[v3] Introduce Copy-On-Write to Page Table

[PATCH v3 03/14] mm: Add break COW PTE fault and helper functions

Posted by Chih-En Lin 2 years, 9 months ago

Add the function, break_cow_pte_fault(), to break (unshare) COW-ed PTE
with the page fault that will modify the PTE table or the mapped page
resided in COW-ed PTE (i.e., write, unshared, file read).

When breaking COW PTE, it first checks COW-ed PTE's refcount to try to
reuse it. If COW-ed PTE cannot be reused, allocates new PTE and
duplicates all pte entries in COW-ed PTE. Moreover, flush TLB when we
change the write protection of PTE.

In addition, provide the helper functions, break_cow_pte{,_range}(), to
let the other features (remap, THP, migration, swapfile, etc) to use.

Signed-off-by: Chih-En Lin <shiyn.lin@gmail.com>
---
 include/linux/mm.h      |   4 +
 include/linux/pgtable.h |   6 +
 mm/memory.c             | 319 +++++++++++++++++++++++++++++++++++++++-
 mm/mmap.c               |   4 +
 mm/mremap.c             |   2 +
 mm/swapfile.c           |   2 +
 6 files changed, 331 insertions(+), 6 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8c6ec1da2336f..6a0eb01ee6f7e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1894,6 +1894,10 @@ void pagecache_isize_extended(struct inode *inode, loff_t from, loff_t to);
 void truncate_pagecache_range(struct inode *inode, loff_t offset, loff_t end);
 int generic_error_remove_page(struct address_space *mapping, struct page *page);
 
+int break_cow_pte(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr);
+int break_cow_pte_range(struct vm_area_struct *vma, unsigned long start,
+			unsigned long end);
+
 #ifdef CONFIG_MMU
 extern vm_fault_t handle_mm_fault(struct vm_area_struct *vma,
 				  unsigned long address, unsigned int flags,
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index a108b60a6962b..895fa18e3b011 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1395,6 +1395,12 @@ static inline int pmd_none_or_trans_huge_or_clear_bad(pmd_t *pmd)
 	if (pmd_none(pmdval) || pmd_trans_huge(pmdval) ||
 		(IS_ENABLED(CONFIG_ARCH_ENABLE_THP_MIGRATION) && !pmd_present(pmdval)))
 		return 1;
+	/*
+	 * COW-ed PTE has write protection which can trigger pmd_bad().
+	 * To avoid this, return here if entry is write protection.
+	 */
+	if (!pmd_write(pmdval))
+		return 0;
 	if (unlikely(pmd_bad(pmdval))) {
 		pmd_clear_bad(pmd);
 		return 1;
diff --git a/mm/memory.c b/mm/memory.c
index 5b474d14a5411..8ebff4cac2191 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -239,6 +239,35 @@ static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
 	pmd = pmd_offset(pud, addr);
 	do {
 		next = pmd_addr_end(addr, end);
+		/*
+		 * For COW-ed PTE, the pte entries still mapping to pages.
+		 * However, we should did de-accounting to all of it. So,
+		 * even if the refcount is not the same as zapping, we
+		 * could still fall back to normal PTE and handle it
+		 * without traversing entries to do the de-accounting.
+		 */
+		if (test_bit(MMF_COW_PTE, &tlb->mm->flags)) {
+			if (!pmd_none(*pmd) && !pmd_write(*pmd)) {
+				spinlock_t *ptl = pte_lockptr(tlb->mm, pmd);
+
+				spin_lock(ptl);
+				if (!pmd_put_pte(pmd)) {
+					pmd_t new = pmd_mkwrite(*pmd);
+
+					set_pmd_at(tlb->mm, addr, pmd, new);
+					spin_unlock(ptl);
+					free_pte_range(tlb, pmd, addr);
+					continue;
+				}
+				spin_unlock(ptl);
+
+				pmd_clear(pmd);
+				mm_dec_nr_ptes(tlb->mm);
+				flush_tlb_mm_range(tlb->mm, addr, next,
+						   PAGE_SHIFT, false);
+			} else
+				VM_WARN_ON(cow_pte_count(pmd) != 1);
+		}
 		if (pmd_none_or_clear_bad(pmd))
 			continue;
 		free_pte_range(tlb, pmd, addr);
@@ -1676,12 +1705,34 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
 	pte_t *start_pte;
 	pte_t *pte;
 	swp_entry_t entry;
+	bool pte_is_shared = false;
+
+	if (test_bit(MMF_COW_PTE, &mm->flags) && !pmd_write(*pmd)) {
+		if (!range_in_vma(vma, addr & PMD_MASK,
+				  (addr + PMD_SIZE) & PMD_MASK)) {
+			/*
+			 * We cannot promise this COW-ed PTE will also be zap
+			 * with the rest of VMAs. So, break COW PTE here.
+			 */
+			break_cow_pte(vma, pmd, addr);
+		} else {
+			start_pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
+			if (cow_pte_count(pmd) == 1) {
+				/* Reuse COW-ed PTE */
+				pmd_t new = pmd_mkwrite(*pmd);
+				set_pmd_at(tlb->mm, addr, pmd, new);
+			} else
+				pte_is_shared = true;
+			pte_unmap_unlock(start_pte, ptl);
+		}
+	}
 
 	tlb_change_page_size(tlb, PAGE_SIZE);
 again:
 	init_rss_vec(rss);
 	start_pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
 	pte = start_pte;
+
 	flush_tlb_batched_pending(mm);
 	arch_enter_lazy_mmu_mode();
 	do {
@@ -1698,11 +1749,15 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
 			page = vm_normal_page(vma, addr, ptent);
 			if (unlikely(!should_zap_page(details, page)))
 				continue;
-			ptent = ptep_get_and_clear_full(mm, addr, pte,
-							tlb->fullmm);
+			if (pte_is_shared)
+				ptent = *pte;
+			else
+				ptent = ptep_get_and_clear_full(mm, addr, pte,
+								tlb->fullmm);
 			tlb_remove_tlb_entry(tlb, pte, addr);
-			zap_install_uffd_wp_if_needed(vma, addr, pte, details,
-						      ptent);
+			if (!pte_is_shared)
+				zap_install_uffd_wp_if_needed(vma, addr, pte,
+							      details, ptent);
 			if (unlikely(!page))
 				continue;
 
@@ -1768,8 +1823,12 @@ static unsigned long zap_pte_range(struct mmu_gather *tlb,
 			/* We should have covered all the swap entry types */
 			WARN_ON_ONCE(1);
 		}
-		pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
-		zap_install_uffd_wp_if_needed(vma, addr, pte, details, ptent);
+
+		if (!pte_is_shared) {
+			pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
+			zap_install_uffd_wp_if_needed(vma, addr, pte,
+						      details, ptent);
+		}
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 
 	add_mm_rss_vec(mm, rss);
@@ -2147,6 +2206,8 @@ static int insert_page(struct vm_area_struct *vma, unsigned long addr,
 	if (retval)
 		goto out;
 	retval = -ENOMEM;
+	if (break_cow_pte(vma, NULL, addr) < 0)
+		goto out;
 	pte = get_locked_pte(vma->vm_mm, addr, &ptl);
 	if (!pte)
 		goto out;
@@ -2406,6 +2467,9 @@ static vm_fault_t insert_pfn(struct vm_area_struct *vma, unsigned long addr,
 	pte_t *pte, entry;
 	spinlock_t *ptl;
 
+	if (break_cow_pte(vma, NULL, addr) < 0)
+		return VM_FAULT_OOM;
+
 	pte = get_locked_pte(mm, addr, &ptl);
 	if (!pte)
 		return VM_FAULT_OOM;
@@ -2783,6 +2847,10 @@ int remap_pfn_range_notrack(struct vm_area_struct *vma, unsigned long addr,
 	BUG_ON(addr >= end);
 	pfn -= addr >> PAGE_SHIFT;
 	pgd = pgd_offset(mm, addr);
+
+	if (!break_cow_pte_range(vma, addr, end))
+		return -ENOMEM;
+
 	flush_cache_range(vma, addr, end);
 	do {
 		next = pgd_addr_end(addr, end);
@@ -5143,6 +5211,226 @@ static vm_fault_t wp_huge_pud(struct vm_fault *vmf, pud_t orig_pud)
 	return VM_FAULT_FALLBACK;
 }
 
+/* Break (unshare) COW PTE */
+static vm_fault_t handle_cow_pte_fault(struct vm_fault *vmf)
+{
+	struct vm_area_struct *vma = vmf->vma;
+	struct mm_struct *mm = vma->vm_mm;
+	pmd_t *pmd = vmf->pmd;
+	unsigned long start, end, addr = vmf->address;
+	struct mmu_notifier_range range;
+	pmd_t cowed_entry;
+	pte_t *orig_dst_pte, *orig_src_pte;
+	pte_t *dst_pte, *src_pte;
+	spinlock_t *dst_ptl, *src_ptl;
+	int ret = 0;
+
+	/*
+	 * Do nothing with the fault that doesn't have PTE yet
+	 * (from lazy fork).
+	 */
+	if (pmd_none(*pmd) || pmd_write(*pmd))
+		return 0;
+	/* COW PTE doesn't handle huge page. */
+	if (is_swap_pmd(*pmd) || pmd_trans_huge(*pmd) || pmd_devmap(*pmd))
+		return 0;
+
+	mmap_assert_write_locked(mm);
+
+	start = addr & PMD_MASK;
+	end = (addr + PMD_SIZE) & PMD_MASK;
+	addr = start;
+
+	mmu_notifier_range_init(&range, MMU_NOTIFY_PROTECTION_PAGE,
+				0, vma, mm, start, end);
+	/*
+	 * Because of the address range is PTE not only for the faulted
+	 * vma, it might have some unmatch situations since mmu notifier
+	 * will only reigster the faulted vma.
+	 * Do we really need to care about this kind of unmatch?
+	 */
+	mmu_notifier_invalidate_range_start(&range);
+	raw_write_seqcount_begin(&mm->write_protect_seq);
+
+	/*
+	 * Fast path, check if we are the only one faulted task
+	 * references to this COW-ed PTE, reuse it.
+	 */
+	src_pte = pte_offset_map_lock(mm, pmd, addr, &src_ptl);
+	if (cow_pte_count(pmd) == 1) {
+		pmd_t new = pmd_mkwrite(*pmd);
+		set_pmd_at(mm, addr, pmd, new);
+		pte_unmap_unlock(src_pte, src_ptl);
+		goto flush_tlb;
+	}
+	pte_unmap_unlock(src_pte, src_ptl);
+
+	/*
+	 * Slow path. Since we already did the accounting and still
+	 * sharing the mapped pages, we can just clone PTE.
+	 */
+
+	cowed_entry = READ_ONCE(*pmd);
+	/* Decrease the pgtable_bytes of COW-ed PTE. */
+	mm_dec_nr_ptes(mm);
+	pmd_clear(pmd);
+	orig_dst_pte = dst_pte = pte_alloc_map_lock(mm, pmd, addr, &dst_ptl);
+	if (unlikely(!dst_pte)) {
+		/* If allocation failed, restore COW-ed PTE. */
+		set_pmd_at(mm, addr, pmd, cowed_entry);
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/*
+	 * We should hold the lock of COW-ed PTE until all the operations
+	 * have been done, including duplicating, TLB flush, and decrease
+	 * refcount.
+	 */
+	src_pte = pte_offset_map_lock(mm, &cowed_entry, addr, &src_ptl);
+	orig_src_pte = src_pte;
+	arch_enter_lazy_mmu_mode();
+
+	do {
+		if (pte_none(*src_pte))
+			continue;
+		/*
+		 * We should handled the most of cases in copy_cow_pte_range(),
+		 * But, we cannot distinguish the vma is belong to parent or
+		 * child, so we need to take care about it.
+		 */
+		set_pte_at(mm, addr, dst_pte, *src_pte);
+	} while (dst_pte++, src_pte++, addr += PAGE_SIZE, addr != end);
+
+	arch_leave_lazy_mmu_mode();
+	pte_unmap_unlock(orig_dst_pte, dst_ptl);
+
+	/* Decrease the refcount of COW-ed PTE. */
+	if (!pmd_put_pte(&cowed_entry)) {
+		/* COW-ed (old) PTE's refcount is 1, reuse it. */
+		pgtable_t token = pmd_pgtable(*pmd);
+		/* Reuse COW-ed PTE. */
+		pmd_t new = pmd_mkwrite(cowed_entry);
+
+		/* Clear all the entries of new PTE. */
+		addr = start;
+		dst_pte = pte_offset_map_lock(mm, pmd, addr, &dst_ptl);
+		orig_dst_pte = dst_pte;
+		do {
+			if (pte_none(*dst_pte))
+				continue;
+			if (pte_present(*dst_pte))
+				page_table_check_pte_clear(mm, addr, *dst_pte);
+			pte_clear(mm, addr, dst_pte);
+		} while (dst_pte++, addr += PAGE_SIZE, addr != end);
+		pte_unmap_unlock(orig_dst_pte, dst_ptl);
+		/* Now, we can safely free new PTE. */
+		pmd_clear(pmd);
+		pte_free(mm, token);
+		/* Reuse COW-ed PTE */
+		set_pmd_at(mm, start, pmd, new);
+	}
+
+	pte_unmap_unlock(orig_src_pte, src_ptl);
+
+flush_tlb:
+	/*
+	 * If we change the protection, flush TLB.
+	 * flush_tlb_range() will only use vma to get mm, we don't need
+	 * to consider the unmatch address range with vma problem here.
+	 */
+	flush_tlb_range(vma, start, end);
+out:
+	raw_write_seqcount_end(&mm->write_protect_seq);
+	mmu_notifier_invalidate_range_end(&range);
+
+	return ret;
+}
+
+static inline int __break_cow_pte(struct vm_area_struct *vma, pmd_t *pmd,
+				  unsigned long addr)
+{
+	struct vm_fault vmf = {
+		.vma = vma,
+		.address = addr & PAGE_MASK,
+		.pmd = pmd,
+	};
+
+	return handle_cow_pte_fault(&vmf);
+}
+
+/**
+ * break_cow_pte - duplicate/reuse shared, wprotected (COW-ed) PTE
+ * @vma: target vma want to break COW
+ * @pmd: pmd index that maps to the shared PTE
+ * @addr: the address trigger break COW PTE
+ *
+ * The address needs to be in the range of shared and write portected
+ * PTE that the pmd index mapped. If pmd is NULL, it will get the pmd
+ * from vma. Duplicate COW-ed PTE when some still mapping to it.
+ * Otherwise, reuse COW-ed PTE.
+ */
+int break_cow_pte(struct vm_area_struct *vma, pmd_t *pmd, unsigned long addr)
+{
+	struct mm_struct *mm;
+	pgd_t *pgd;
+	p4d_t *p4d;
+	pud_t *pud;
+
+	if (!vma)
+		return -EINVAL;
+	mm = vma->vm_mm;
+
+	if (!test_bit(MMF_COW_PTE, &mm->flags))
+		return 0;
+
+	if (!pmd) {
+		pgd = pgd_offset(mm, addr);
+		if (pgd_none_or_clear_bad(pgd))
+			return 0;
+		p4d = p4d_offset(pgd, addr);
+		if (p4d_none_or_clear_bad(p4d))
+			return 0;
+		pud = pud_offset(p4d, addr);
+		if (pud_none_or_clear_bad(pud))
+			return 0;
+		pmd = pmd_offset(pud, addr);
+	}
+
+	/* We will check the type of pmd entry later. */
+
+	return __break_cow_pte(vma, pmd, addr);
+}
+
+/**
+ * break_cow_pte_range - duplicate/reuse COW-ed PTE in a given range
+ * @vma: target vma want to break COW
+ * @start: the address of start breaking
+ * @end: the address of end breaking
+ *
+ * Return: zero on success, the number of failed otherwise.
+ */
+int break_cow_pte_range(struct vm_area_struct *vma, unsigned long start,
+			unsigned long end)
+{
+	unsigned long addr, next;
+	int nr_failed = 0;
+
+	if (!vma)
+		return -EINVAL;
+	if (range_in_vma(vma, start, end))
+		return -EINVAL;
+
+	addr = start;
+	do {
+		next = pmd_addr_end(addr, end);
+		if (break_cow_pte(vma, NULL, addr) < 0)
+			nr_failed++;
+	} while (addr = next, addr != end);
+
+	return nr_failed;
+}
+
 /*
  * These routines also need to handle stuff like marking pages dirty
  * and/or accessed for architectures that don't do it in hardware (most
@@ -5355,8 +5643,27 @@ static vm_fault_t __handle_mm_fault(struct vm_area_struct *vma,
 				return 0;
 			}
 		}
+		/*
+		 * Duplicate COW-ed PTE when page fault will change the
+		 * mapped pages (write or unshared fault) or COW-ed PTE
+		 * (file mapped read fault, see do_read_fault()).
+		 */
+		if ((flags & (FAULT_FLAG_WRITE|FAULT_FLAG_UNSHARE) ||
+		      vma->vm_ops) && test_bit(MMF_COW_PTE, &mm->flags)) {
+			ret = handle_cow_pte_fault(&vmf);
+			if (unlikely(ret == -ENOMEM))
+				return VM_FAULT_OOM;
+		}
 	}
 
+	/*
+	 * It's definitely will break the kernel when refcount of PTE
+	 * is higher than 1 and it is writeable in PMD entry. But we
+	 * want to see more information so just warning here.
+	 */
+	if (likely(!pmd_none(*vmf.pmd)))
+		VM_WARN_ON(cow_pte_count(vmf.pmd) > 1 && pmd_write(*vmf.pmd));
+
 	return handle_pte_fault(&vmf);
 }
 
diff --git a/mm/mmap.c b/mm/mmap.c
index 74a84eb33b904..3eb9b852adc3b 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2208,6 +2208,10 @@ int __split_vma(struct mm_struct *mm, struct vm_area_struct *vma,
 			return err;
 	}
 
+	err = break_cow_pte(vma, NULL, addr);
+	if (err)
+		return err;
+
 	new = vm_area_dup(vma);
 	if (!new)
 		return -ENOMEM;
diff --git a/mm/mremap.c b/mm/mremap.c
index e465ffe279bb0..b4136b12f24b6 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -534,6 +534,8 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
 		old_pmd = get_old_pmd(vma->vm_mm, old_addr);
 		if (!old_pmd)
 			continue;
+		/* TLB flush twice time here? */
+		break_cow_pte(vma, old_pmd, old_addr);
 		new_pmd = alloc_new_pmd(vma->vm_mm, vma, new_addr);
 		if (!new_pmd)
 			break;
diff --git a/mm/swapfile.c b/mm/swapfile.c
index 72e481aacd5df..10af3e0a2eb5d 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -1911,6 +1911,8 @@ static inline int unuse_pmd_range(struct vm_area_struct *vma, pud_t *pud,
 		next = pmd_addr_end(addr, end);
 		if (pmd_none_or_trans_huge_or_clear_bad(pmd))
 			continue;
+		if (break_cow_pte(vma, pmd, addr) < 0)
+			return -ENOMEM;
 		ret = unuse_pte_range(vma, pmd, addr, next, type);
 		if (ret)
 			return ret;
-- 
2.37.3

Re: [PATCH v3 03/14] mm: Add break COW PTE fault and helper functions

Posted by kernel test robot 2 years, 9 months ago

Hi Chih-En,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on v6.1-rc7]
[also build test ERROR on next-20221220]
[cannot apply to akpm-mm/mm-everything tip/perf/core acme/perf/core linus/master v6.1 v6.1-rc8]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Chih-En-Lin/Introduce-Copy-On-Write-to-Page-Table/20221220-153207
patch link:    https://lore.kernel.org/r/20221220072743.3039060-4-shiyn.lin%40gmail.com
patch subject: [PATCH v3 03/14] mm: Add break COW PTE fault and helper functions
config: powerpc-allnoconfig
compiler: powerpc-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/18accecf2701f7705ada53938cc2005fa15cc063
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Chih-En-Lin/Introduce-Copy-On-Write-to-Page-Table/20221220-153207
        git checkout 18accecf2701f7705ada53938cc2005fa15cc063
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   mm/memory.c: In function 'free_pmd_range':
>> mm/memory.c:255:53: error: implicit declaration of function 'pmd_mkwrite'; did you mean 'pmd_write'? [-Werror=implicit-function-declaration]
     255 |                                         pmd_t new = pmd_mkwrite(*pmd);
         |                                                     ^~~~~~~~~~~
         |                                                     pmd_write
>> mm/memory.c:255:53: error: invalid initializer
   mm/memory.c:257:41: error: implicit declaration of function 'set_pmd_at'; did you mean 'set_pte_at'? [-Werror=implicit-function-declaration]
     257 |                                         set_pmd_at(tlb->mm, addr, pmd, new);
         |                                         ^~~~~~~~~~
         |                                         set_pte_at
>> mm/memory.c:266:33: error: implicit declaration of function 'flush_tlb_mm_range'; did you mean 'flush_tlb_range'? [-Werror=implicit-function-declaration]
     266 |                                 flush_tlb_mm_range(tlb->mm, addr, next,
         |                                 ^~~~~~~~~~~~~~~~~~
         |                                 flush_tlb_range
   In file included from arch/powerpc/include/asm/page.h:331,
                    from arch/powerpc/include/asm/thread_info.h:13,
                    from include/linux/thread_info.h:60,
                    from arch/powerpc/include/asm/ptrace.h:328,
                    from arch/powerpc/include/asm/hw_irq.h:12,
                    from arch/powerpc/include/asm/irqflags.h:12,
                    from include/linux/irqflags.h:16,
                    from include/asm-generic/cmpxchg-local.h:6,
                    from arch/powerpc/include/asm/cmpxchg.h:526,
                    from arch/powerpc/include/asm/atomic.h:11,
                    from include/linux/atomic.h:7,
                    from include/linux/cpumask.h:13,
                    from include/linux/smp.h:13,
                    from include/linux/kernel_stat.h:5,
                    from mm/memory.c:42:
   mm/memory.c: In function 'copy_cow_pte_range':
   include/asm-generic/memory_model.h:18:33: error: initialization of 'pgtable_t' {aka 'long unsigned int *'} from incompatible pointer type 'struct page *' [-Werror=incompatible-pointer-types]
      18 | #define __pfn_to_page(pfn)      (mem_map + ((pfn) - ARCH_PFN_OFFSET))
         |                                 ^
   include/asm-generic/memory_model.h:53:21: note: in expansion of macro '__pfn_to_page'
      53 | #define pfn_to_page __pfn_to_page
         |                     ^~~~~~~~~~~~~
   arch/powerpc/include/asm/book3s/32/pgtable.h:363:33: note: in expansion of macro 'pfn_to_page'
     363 | #define pmd_page(pmd)           pfn_to_page(pmd_pfn(pmd))
         |                                 ^~~~~~~~~~~
   mm/memory.c:1217:31: note: in expansion of macro 'pmd_page'
    1217 |         pgtable_t pte_table = pmd_page(*src_pmd);
         |                               ^~~~~~~~
   mm/memory.c:1329:48: error: implicit declaration of function 'pmd_wrprotect'; did you mean 'pte_wrprotect'? [-Werror=implicit-function-declaration]
    1329 |         set_pmd_at(dst_mm, orig_addr, dst_pmd, pmd_wrprotect(*src_pmd));
         |                                                ^~~~~~~~~~~~~
         |                                                pte_wrprotect
   mm/memory.c: In function 'zap_pte_range':
   mm/memory.c:1722:45: error: invalid initializer
    1722 |                                 pmd_t new = pmd_mkwrite(*pmd);
         |                                             ^~~~~~~~~~~
   mm/memory.c: In function 'handle_cow_pte_fault':
   mm/memory.c:5261:29: error: invalid initializer
    5261 |                 pmd_t new = pmd_mkwrite(*pmd);
         |                             ^~~~~~~~~~~
   mm/memory.c:5313:29: error: invalid initializer
    5313 |                 pmd_t new = pmd_mkwrite(cowed_entry);
         |                             ^~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +255 mm/memory.c

   229	
   230	static inline void free_pmd_range(struct mmu_gather *tlb, pud_t *pud,
   231					unsigned long addr, unsigned long end,
   232					unsigned long floor, unsigned long ceiling)
   233	{
   234		pmd_t *pmd;
   235		unsigned long next;
   236		unsigned long start;
   237	
   238		start = addr;
   239		pmd = pmd_offset(pud, addr);
   240		do {
   241			next = pmd_addr_end(addr, end);
   242			/*
   243			 * For COW-ed PTE, the pte entries still mapping to pages.
   244			 * However, we should did de-accounting to all of it. So,
   245			 * even if the refcount is not the same as zapping, we
   246			 * could still fall back to normal PTE and handle it
   247			 * without traversing entries to do the de-accounting.
   248			 */
   249			if (test_bit(MMF_COW_PTE, &tlb->mm->flags)) {
   250				if (!pmd_none(*pmd) && !pmd_write(*pmd)) {
   251					spinlock_t *ptl = pte_lockptr(tlb->mm, pmd);
   252	
   253					spin_lock(ptl);
   254					if (!pmd_put_pte(pmd)) {
 > 255						pmd_t new = pmd_mkwrite(*pmd);
   256	
   257						set_pmd_at(tlb->mm, addr, pmd, new);
   258						spin_unlock(ptl);
   259						free_pte_range(tlb, pmd, addr);
   260						continue;
   261					}
   262					spin_unlock(ptl);
   263	
   264					pmd_clear(pmd);
   265					mm_dec_nr_ptes(tlb->mm);
 > 266					flush_tlb_mm_range(tlb->mm, addr, next,
   267							   PAGE_SHIFT, false);
   268				} else
   269					VM_WARN_ON(cow_pte_count(pmd) != 1);
   270			}
   271			if (pmd_none_or_clear_bad(pmd))
   272				continue;
   273			free_pte_range(tlb, pmd, addr);
   274		} while (pmd++, addr = next, addr != end);
   275	
   276		start &= PUD_MASK;
   277		if (start < floor)
   278			return;
   279		if (ceiling) {
   280			ceiling &= PUD_MASK;
   281			if (!ceiling)
   282				return;
   283		}
   284		if (end - 1 > ceiling - 1)
   285			return;
   286	
   287		pmd = pmd_offset(pud, start);
   288		pud_clear(pud);
   289		pmd_free_tlb(tlb, pmd, start);
   290		mm_dec_nr_pmds(tlb->mm);
   291	}
   292	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp
#
# Automatically generated file; DO NOT EDIT.
# Linux/powerpc 6.1.0-rc7 Kernel Configuration
#
CONFIG_CC_VERSION_TEXT="powerpc-linux-gcc (GCC) 12.1.0"
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=120100
CONFIG_CLANG_VERSION=0
CONFIG_AS_IS_GNU=y
CONFIG_AS_VERSION=23800
CONFIG_LD_IS_BFD=y
CONFIG_LD_VERSION=23800
CONFIG_LLD_VERSION=0
CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
CONFIG_CC_HAS_ASM_INLINE=y
CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
CONFIG_PAHOLE_VERSION=123
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_TABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
# CONFIG_WERROR is not set
CONFIG_LOCALVERSION=""
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_KERNEL_GZIP=y
# CONFIG_KERNEL_XZ is not set
CONFIG_DEFAULT_INIT=""
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SYSVIPC is not set
# CONFIG_WATCH_QUEUE is not set
# CONFIG_CROSS_MEMORY_ATTACH is not set
# CONFIG_USELIB is not set
CONFIG_HAVE_ARCH_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
CONFIG_IRQ_DOMAIN=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# end of IRQ subsystem

CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CMOS_UPDATE=y

#
# Timers subsystem
#
CONFIG_HZ_PERIODIC=y
# CONFIG_NO_HZ_IDLE is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
# end of Timers subsystem

CONFIG_HAVE_EBPF_JIT=y

#
# BPF subsystem
#
# CONFIG_BPF_SYSCALL is not set
# end of BPF subsystem

CONFIG_PREEMPT_NONE_BUILD=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_TICK_CPU_ACCOUNTING=y
# CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set
# CONFIG_IRQ_TIME_ACCOUNTING is not set
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_PSI is not set
# end of CPU/Task time and stats accounting

#
# RCU Subsystem
#
CONFIG_TINY_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TINY_SRCU=y
# end of RCU Subsystem

# CONFIG_IKCONFIG is not set
# CONFIG_IKHEADERS is not set
CONFIG_LOG_BUF_SHIFT=17
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=13

#
# Scheduler features
#
# end of Scheduler features

CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
CONFIG_GCC12_NO_ARRAY_BOUNDS=y
CONFIG_CC_NO_ARRAY_BOUNDS=y
# CONFIG_CGROUPS is not set
CONFIG_NAMESPACES=y
# CONFIG_UTS_NS is not set
# CONFIG_TIME_NS is not set
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_BOOT_CONFIG is not set
# CONFIG_INITRAMFS_PRESERVE_MTIME is not set
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
# CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not set
CONFIG_LD_ORPHAN_WARN=y
CONFIG_SYSCTL=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_EXPERT=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
CONFIG_FHANDLE=y
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_IO_URING=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_ALL is not set
CONFIG_KALLSYMS_BASE_RELATIVE=y
CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS=y
CONFIG_ARCH_HAS_MEMBARRIER_SYNC_CORE=y
# CONFIG_KCMP is not set
CONFIG_RSEQ=y
# CONFIG_DEBUG_RSEQ is not set
# CONFIG_EMBEDDED is not set
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# end of Kernel Performance Events And Counters

# CONFIG_PROFILING is not set
# end of General setup

CONFIG_PPC32=y
# CONFIG_PPC64 is not set

#
# Processor support
#
CONFIG_PPC_BOOK3S_32=y
# CONFIG_PPC_85xx is not set
# CONFIG_PPC_8xx is not set
# CONFIG_40x is not set
# CONFIG_44x is not set
# CONFIG_PPC_BOOK3S_603 is not set
CONFIG_PPC_BOOK3S_604=y
CONFIG_POWERPC_CPU=y
# CONFIG_E300C2_CPU is not set
# CONFIG_E300C3_CPU is not set
# CONFIG_G4_CPU is not set
# CONFIG_TOOLCHAIN_DEFAULT_CPU is not set
CONFIG_TARGET_CPU_BOOL=y
CONFIG_TARGET_CPU="powerpc"
CONFIG_PPC_BOOK3S=y
CONFIG_PPC_FPU_REGS=y
CONFIG_PPC_FPU=y
# CONFIG_ALTIVEC is not set
# CONFIG_PPC_KUEP is not set
# CONFIG_PPC_KUAP is not set
CONFIG_PPC_HAVE_PMU_SUPPORT=y
# CONFIG_PMU_SYSFS is not set
# CONFIG_SMP is not set
CONFIG_NR_CPUS=1
# end of Processor support

CONFIG_VDSO32=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_32BIT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_BITS_MIN=11
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
CONFIG_NR_IRQS=512
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_PPC=y
CONFIG_EARLY_PRINTK=y
CONFIG_PANIC_TIMEOUT=180
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_BUG_RELATIVE_POINTERS=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_HAS_ADD_PAGES=y
# CONFIG_PPC_PCI_BUS_NUM_DOMAIN_DEPENDENT is not set
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_PGTABLE_LEVELS=2

#
# Platform support
#
# CONFIG_PPC_CHRP is not set
# CONFIG_PPC_MPC512x is not set
# CONFIG_PPC_MPC52xx is not set
# CONFIG_PPC_PMAC is not set
# CONFIG_PPC_82xx is not set
# CONFIG_PPC_83xx is not set
# CONFIG_PPC_86xx is not set
# CONFIG_EMBEDDED6xx is not set
# CONFIG_AMIGAONE is not set
# CONFIG_KVM_GUEST is not set
# CONFIG_EPAPR_PARAVIRT is not set
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
# end of CPU Frequency scaling

#
# CPUIdle driver
#

#
# CPU Idle
#
# CONFIG_CPU_IDLE is not set
# end of CPU Idle
# end of CPUIdle driver

# CONFIG_TAU is not set
# CONFIG_GEN_RTC is not set
# end of Platform support

#
# Kernel options
#
# CONFIG_HIGHMEM is not set
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
# CONFIG_KEXEC is not set
# CONFIG_CRASH_DUMP is not set
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ILLEGAL_POINTER_VALUE=0
CONFIG_PPC_4K_PAGES=y
CONFIG_PAGE_SIZE_4KB=y
CONFIG_PPC_PAGE_SHIFT=12
CONFIG_THREAD_SHIFT=13
CONFIG_DATA_SHIFT=12
CONFIG_ARCH_FORCE_MAX_ORDER=11
CONFIG_CMDLINE=""
CONFIG_EXTRA_TARGETS=""
# CONFIG_PM is not set
# end of Kernel options

#
# Bus options
#
# CONFIG_FSL_LBC is not set
# end of Bus options

#
# Advanced setup
#
# CONFIG_ADVANCED_OPTIONS is not set

#
# Default settings for advanced configuration options are used
#
CONFIG_LOWMEM_SIZE=0x30000000
CONFIG_PAGE_OFFSET=0xc0000000
CONFIG_KERNEL_START=0xc0000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_TASK_SIZE=0xb0000000
# end of Advanced setup

# CONFIG_VIRTUALIZATION is not set
CONFIG_HAVE_LIVEPATCH=y

#
# General architecture-dependent options
#
# CONFIG_JUMP_LABEL is not set
# CONFIG_STATIC_CALL_SELFTEST is not set
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_ARCH_HAS_SET_MEMORY=y
CONFIG_ARCH_WANTS_NO_INSTR=y
CONFIG_ARCH_32BIT_OFF_T=y
CONFIG_HAVE_ASM_MODVERSIONS=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_ARCH_JUMP_LABEL_RELATIVE=y
CONFIG_MMU_GATHER_TABLE_FREE=y
CONFIG_MMU_GATHER_RCU_TABLE_FREE=y
CONFIG_MMU_GATHER_PAGE_SIZE=y
CONFIG_MMU_GATHER_MERGE_VMAS=y
CONFIG_ARCH_WANT_IRQS_OFF_ACTIVATE_MM=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_ARCH_WEAK_RELEASE_ACQUIRE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_HAVE_ARCH_SECCOMP=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
# CONFIG_SECCOMP is not set
CONFIG_HAVE_STACKPROTECTOR=y
# CONFIG_STACKPROTECTOR is not set
CONFIG_LTO_NONE=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_ARCH_WANTS_MODULES_DATA_IN_VMALLOC=y
CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
CONFIG_SOFTIRQ_ON_OWN_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_ARCH_MMAP_RND_BITS=11
CONFIG_PAGE_SIZE_LESS_THAN_64KB=y
CONFIG_PAGE_SIZE_LESS_THAN_256KB=y
CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
CONFIG_HAVE_RELIABLE_STACKTRACE=y
CONFIG_HAVE_ARCH_NVRAM_OPS=y
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND=y
CONFIG_OLD_SIGACTION=y
# CONFIG_COMPAT_32BIT_TIME is not set
CONFIG_HAVE_ARCH_VMAP_STACK=y
# CONFIG_VMAP_STACK is not set
CONFIG_HAVE_ARCH_RANDOMIZE_KSTACK_OFFSET=y
CONFIG_RANDOMIZE_KSTACK_OFFSET=y
# CONFIG_RANDOMIZE_KSTACK_OFFSET_DEFAULT is not set
CONFIG_ARCH_OPTIONAL_KERNEL_RWX=y
CONFIG_ARCH_OPTIONAL_KERNEL_RWX_DEFAULT=y
CONFIG_ARCH_HAS_STRICT_KERNEL_RWX=y
# CONFIG_STRICT_KERNEL_RWX is not set
CONFIG_ARCH_HAS_STRICT_MODULE_RWX=y
CONFIG_ARCH_HAS_PHYS_TO_DMA=y
CONFIG_HAVE_STATIC_CALL=y
CONFIG_ARCH_WANT_LD_ORPHAN_WARN=y
CONFIG_ARCH_SUPPORTS_DEBUG_PAGEALLOC=y
CONFIG_ARCH_SPLIT_ARG64=y

#
# GCOV-based kernel profiling
#
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
# end of GCOV-based kernel profiling

CONFIG_HAVE_GCC_PLUGINS=y
# CONFIG_GCC_PLUGINS is not set
# end of General architecture-dependent options

CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
# CONFIG_MODULES is not set
CONFIG_BLOCK=y
# CONFIG_BLOCK_LEGACY_AUTOLOAD is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_SED_OPAL is not set
# CONFIG_BLK_INLINE_ENCRYPTION is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_EFI_PARTITION=y
# end of Partition Types

#
# IO Schedulers
#
# CONFIG_MQ_IOSCHED_DEADLINE is not set
# CONFIG_MQ_IOSCHED_KYBER is not set
# CONFIG_IOSCHED_BFQ is not set
# end of IO Schedulers

CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE=y
CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_ELFCORE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
# CONFIG_BINFMT_SCRIPT is not set
# CONFIG_BINFMT_MISC is not set
CONFIG_COREDUMP=y
# end of Executable file formats

#
# Memory Management options
#
# CONFIG_SWAP is not set

#
# SLAB allocator options
#
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
# CONFIG_SLAB_MERGE_DEFAULT is not set
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_SLAB_FREELIST_HARDENED is not set
# CONFIG_SLUB_STATS is not set
# end of SLAB allocator options

# CONFIG_SHUFFLE_PAGE_ALLOCATOR is not set
# CONFIG_COMPAT_BRK is not set
CONFIG_FLATMEM=y
CONFIG_HAVE_FAST_GUP=y
CONFIG_ARCH_KEEP_MEMBLOCK=y
CONFIG_EXCLUSIVE_SYSTEM_RAM=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PAGE_REPORTING is not set
# CONFIG_MIGRATION is not set
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CMA is not set
CONFIG_GENERIC_EARLY_IOREMAP=y
# CONFIG_IDLE_PAGE_TRACKING is not set
CONFIG_ARCH_HAS_CURRENT_STACK_POINTER=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_PERCPU_STATS is not set

#
# GUP_TEST needs to have DEBUG_FS enabled
#
CONFIG_ARCH_HAS_PTE_SPECIAL=y
# CONFIG_ANON_VMA_NAME is not set
# CONFIG_USERFAULTFD is not set
# CONFIG_LRU_GEN is not set

#
# Data Access Monitoring
#
# CONFIG_DAMON is not set
# end of Data Access Monitoring
# end of Memory Management options

# CONFIG_NET is not set

#
# Device Drivers
#
# CONFIG_PCCARD is not set

#
# Generic Driver Options
#
# CONFIG_UEVENT_HELPER is not set
# CONFIG_DEVTMPFS is not set
# CONFIG_STANDALONE is not set
# CONFIG_PREVENT_FIRMWARE_BUILD is not set

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER is not set
# CONFIG_FW_LOADER_COMPRESS is not set
# CONFIG_FW_UPLOAD is not set
# end of Firmware loader

CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
# end of Generic Driver Options

#
# Bus devices
#
# CONFIG_MHI_BUS is not set
# CONFIG_MHI_BUS_EP is not set
# end of Bus devices

#
# Firmware Drivers
#

#
# ARM System Control and Management Interface Protocol
#
# end of ARM System Control and Management Interface Protocol

# CONFIG_FIRMWARE_MEMMAP is not set
# CONFIG_GOOGLE_FIRMWARE is not set

#
# Tegra firmware driver
#
# end of Tegra firmware driver
# end of Firmware Drivers

# CONFIG_GNSS is not set
# CONFIG_MTD is not set
CONFIG_DTC=y
CONFIG_OF=y
# CONFIG_OF_UNITTEST is not set
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_KOBJ=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_RESERVED_MEM=y
# CONFIG_OF_OVERLAY is not set
CONFIG_OF_DMA_DEFAULT_COHERENT=y
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
# CONFIG_BLK_DEV is not set

#
# NVME Support
#
# CONFIG_NVME_FC is not set
# end of NVME Support

#
# Misc devices
#
# CONFIG_DUMMY_IRQ is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_SRAM is not set
# CONFIG_XILINX_SDFEC is not set
# CONFIG_OPEN_DICE is not set
# CONFIG_VCPU_STALL_DETECTOR is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_93CX6 is not set
# end of EEPROM support

#
# Texas Instruments shared transport line discipline
#
# end of Texas Instruments shared transport line discipline

#
# Altera FPGA firmware download module (requires I2C)
#
# CONFIG_ECHO is not set
# CONFIG_PVPANIC is not set
# end of Misc devices

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
# CONFIG_SCSI is not set
# end of SCSI device support

# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_MACINTOSH_DRIVERS is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE is not set

#
# Hardware I/O ports
#
# CONFIG_SERIO is not set
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
# CONFIG_GAMEPORT is not set
# end of Hardware I/O ports
# end of Input device support

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_LDISC_AUTOLOAD is not set

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_UARTLITE is not set
# CONFIG_SERIAL_SIFIVE is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_FSL_LINFLEXUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# end of Serial drivers

# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_PPC_EPAPR_HV_BYTECHAN is not set
# CONFIG_NULL_TTY is not set
# CONFIG_HVC_UDBG is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_VIRTIO_CONSOLE is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_DEVMEM is not set
# CONFIG_NVRAM is not set
# CONFIG_TCG_TPM is not set
# CONFIG_XILLYBUS is not set
# CONFIG_RANDOM_TRUST_CPU is not set
# CONFIG_RANDOM_TRUST_BOOTLOADER is not set
# end of Character devices

#
# I2C support
#
# CONFIG_I2C is not set
# end of I2C support

# CONFIG_I3C is not set
# CONFIG_SPI is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
# CONFIG_PPS is not set

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK_OPTIONAL=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# end of PTP clock support

# CONFIG_PINCTRL is not set
# CONFIG_GPIOLIB is not set
# CONFIG_W1 is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_ATMEL_FLEXCOM is not set
# CONFIG_MFD_ATMEL_HLCDC is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_MFD_HI6421_PMIC is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_TQMX86 is not set
# end of Multifunction device drivers

# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set

#
# CEC support
#
# CONFIG_MEDIA_CEC_SUPPORT is not set
# end of CEC support

# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_DRM is not set
# CONFIG_DRM_DEBUG_MODESET_LOCK is not set

#
# ARM devices
#
# end of ARM devices

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# end of Frame buffer Devices

#
# Backlight & LCD device support
#
# CONFIG_LCD_CLASS_DEVICE is not set
# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
# end of Backlight & LCD device support

#
# Console display driver support
#
# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# end of Console display driver support
# end of Graphics support

# CONFIG_SOUND is not set

#
# HID support
#
# CONFIG_HID is not set
# end of HID support

CONFIG_USB_OHCI_LITTLE_ENDIAN=y
# CONFIG_USB_SUPPORT is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_RTC_LIB=y
# CONFIG_RTC_CLASS is not set
# CONFIG_DMADEVICES is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_DMABUF_HEAPS is not set
# end of DMABUF options

# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set
# CONFIG_VFIO is not set
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_VIRTIO_MENU is not set
# CONFIG_VHOST_MENU is not set

#
# Microsoft Hyper-V guest support
#
# end of Microsoft Hyper-V guest support

# CONFIG_GREYBUS is not set
# CONFIG_COMEDI is not set
# CONFIG_STAGING is not set
# CONFIG_GOLDFISH is not set
# CONFIG_COMMON_CLK is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# CONFIG_MICROCHIP_PIT64B is not set
# end of Clock Source drivers

# CONFIG_MAILBOX is not set
# CONFIG_IOMMU_SUPPORT is not set

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set
# end of Remoteproc drivers

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# end of Rpmsg drivers

# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#
# end of Amlogic SoC drivers

#
# Broadcom SoC drivers
#
# end of Broadcom SoC drivers

#
# NXP/Freescale QorIQ SoC drivers
#
# CONFIG_QUICC_ENGINE is not set
# end of NXP/Freescale QorIQ SoC drivers

#
# fujitsu SoC drivers
#
# end of fujitsu SoC drivers

#
# i.MX SoC drivers
#
# end of i.MX SoC drivers

#
# Enable LiteX SoC Builder specific drivers
#
# CONFIG_LITEX_SOC_CONTROLLER is not set
# end of Enable LiteX SoC Builder specific drivers

#
# Qualcomm SoC drivers
#
# end of Qualcomm SoC drivers

# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# end of Xilinx SoC drivers
# end of SOC (System On Chip) specific Drivers

# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
# CONFIG_MEMORY is not set
# CONFIG_IIO is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
# CONFIG_AL_FIC is not set
# CONFIG_XILINX_INTC is not set
# end of IRQ chip support

# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_PHY_CAN_TRANSCEIVER is not set

#
# PHY drivers for Broadcom platforms
#
# CONFIG_BCM_KONA_USB2_PHY is not set
# end of PHY drivers for Broadcom platforms

# CONFIG_PHY_CADENCE_DPHY is not set
# CONFIG_PHY_CADENCE_DPHY_RX is not set
# CONFIG_PHY_CADENCE_SALVO is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# end of PHY Subsystem

# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set
# CONFIG_RAS is not set

#
# Android
#
# CONFIG_ANDROID_BINDER_IPC is not set
# end of Android

# CONFIG_DAX is not set
# CONFIG_NVMEM is not set

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# end of HW tracing support

# CONFIG_FPGA is not set
# CONFIG_FSI is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set
# CONFIG_INTERCONNECT is not set
# CONFIG_COUNTER is not set
# CONFIG_PECI is not set
# CONFIG_HTE is not set
# end of Device Drivers

#
# File systems
#
# CONFIG_VALIDATE_FS_PARSER is not set
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
CONFIG_EXPORTFS=y
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
# CONFIG_FS_VERITY is not set
# CONFIG_DNOTIFY is not set
# CONFIG_INOTIFY_USER is not set
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set
# end of Caches

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set
# end of CD-ROM/DVD Filesystems

#
# DOS/FAT/EXFAT/NT Filesystems
#
# CONFIG_MSDOS_FS is not set
# CONFIG_VFAT_FS is not set
# CONFIG_EXFAT_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS3_FS is not set
# end of DOS/FAT/EXFAT/NT Filesystems

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
# CONFIG_PROC_KCORE is not set
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
# CONFIG_TMPFS is not set
# CONFIG_CONFIGFS_FS is not set
# end of Pseudo filesystems

# CONFIG_MISC_FILESYSTEMS is not set
# CONFIG_NLS is not set
# CONFIG_UNICODE is not set
CONFIG_IO_WQ=y
# end of File systems

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_LSM="landlock,lockdown,yama,loadpin,safesetid,integrity,bpf"

#
# Kernel hardening options
#

#
# Memory initialization
#
CONFIG_CC_HAS_AUTO_VAR_INIT_PATTERN=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO_BARE=y
CONFIG_CC_HAS_AUTO_VAR_INIT_ZERO=y
# CONFIG_INIT_STACK_NONE is not set
# CONFIG_INIT_STACK_ALL_PATTERN is not set
CONFIG_INIT_STACK_ALL_ZERO=y
# CONFIG_INIT_ON_ALLOC_DEFAULT_ON is not set
# CONFIG_INIT_ON_FREE_DEFAULT_ON is not set
CONFIG_CC_HAS_ZERO_CALL_USED_REGS=y
# CONFIG_ZERO_CALL_USED_REGS is not set
# end of Memory initialization

CONFIG_RANDSTRUCT_NONE=y
# end of Kernel hardening options
# end of Security options

# CONFIG_CRYPTO is not set

#
# Library routines
#
# CONFIG_PACKING is not set
CONFIG_BITREVERSE=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
# CONFIG_CORDIC is not set
# CONFIG_PRIME_NUMBERS is not set

#
# Crypto library routines
#
CONFIG_CRYPTO_LIB_BLAKE2S_GENERIC=y
# CONFIG_CRYPTO_LIB_CHACHA is not set
# CONFIG_CRYPTO_LIB_CURVE25519 is not set
CONFIG_CRYPTO_LIB_POLY1305_RSIZE=1
# CONFIG_CRYPTO_LIB_POLY1305 is not set
# end of Crypto library routines

# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC64_ROCKSOFT is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
# CONFIG_RANDOM32_SELFTEST is not set
# CONFIG_XZ_DEC is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_DMA_DECLARE_COHERENT=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_IRQ_POLL is not set
CONFIG_LIBFDT=y
CONFIG_HAVE_GENERIC_VDSO=y
CONFIG_GENERIC_GETTIMEOFDAY=y
CONFIG_GENERIC_VDSO_TIME_NS=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_ARCH_STACKWALK=y
CONFIG_STACKDEPOT=y
CONFIG_SBITMAP=y
# end of Library routines

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
# CONFIG_PRINTK_CALLER is not set
# CONFIG_STACKTRACE_BUILD_ID is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DYNAMIC_DEBUG_CORE is not set
# CONFIG_SYMBOLIC_ERRNAME is not set
CONFIG_DEBUG_BUGVERBOSE=y
# end of printk and dmesg options

CONFIG_DEBUG_KERNEL=y
CONFIG_DEBUG_MISC=y

#
# Compile-time checks and compiler options
#
CONFIG_AS_HAS_NON_CONST_LEB128=y
CONFIG_DEBUG_INFO_NONE=y
# CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT is not set
# CONFIG_DEBUG_INFO_DWARF4 is not set
# CONFIG_DEBUG_INFO_DWARF5 is not set
CONFIG_FRAME_WARN=1024
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_HEADERS_INSTALL is not set
CONFIG_DEBUG_SECTION_MISMATCH=y
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B is not set
# CONFIG_VMLINUX_MAP is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# end of Compile-time checks and compiler options

#
# Generic Kernel Debugging Instruments
#
# CONFIG_MAGIC_SYSRQ is not set
# CONFIG_DEBUG_FS is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
CONFIG_HAVE_KCSAN_COMPILER=y
# end of Generic Kernel Debugging Instruments

#
# Networking Debugging
#
# end of Networking Debugging

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_SLUB_DEBUG=y
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_PAGE_OWNER is not set
# CONFIG_PAGE_POISONING is not set
CONFIG_GENERIC_PTDUMP=y
# CONFIG_DEBUG_OBJECTS is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_VM_PGTABLE is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
CONFIG_DEBUG_MEMORY_INIT=y
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
# CONFIG_DEBUG_STACKOVERFLOW is not set
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_HAVE_ARCH_KASAN_VMALLOC=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_CC_HAS_WORKING_NOSANITIZE_ADDRESS=y
# CONFIG_KASAN is not set
CONFIG_HAVE_ARCH_KFENCE=y
# CONFIG_KFENCE is not set
# end of Memory Debugging

# CONFIG_DEBUG_SHIRQ is not set

#
# Debug Oops, Lockups and Hangs
#
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
# CONFIG_SOFTLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_WQ_WATCHDOG is not set
# end of Debug Oops, Lockups and Hangs

#
# Scheduler Debugging
#
CONFIG_SCHED_DEBUG=y
# CONFIG_SCHEDSTATS is not set
# end of Scheduler Debugging

# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
# CONFIG_SCF_TORTURE_TEST is not set
# end of Lock Debugging (spinlocks, mutexes, etc...)

# CONFIG_DEBUG_IRQFLAGS is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set

#
# Debug kernel data structures
#
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PLIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# CONFIG_DEBUG_MAPLE_TREE is not set
# end of Debug kernel data structures

# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
# CONFIG_RCU_SCALE_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_REF_SCALE_TEST is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_RCU_EQS_DEBUG is not set
# end of RCU Debugging

# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_LATENCYTOP is not set
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS=y
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_SAMPLES is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y

#
# powerpc Debugging
#
# CONFIG_PPC_DISABLE_WERROR is not set
CONFIG_PPC_WERROR=y
CONFIG_PRINT_STACK_DEPTH=64
# CONFIG_CODE_PATCHING_SELFTEST is not set
# CONFIG_FTR_FIXUP_SELFTEST is not set
# CONFIG_MSI_BITMAP_SELFTEST is not set
# CONFIG_XMON is not set
# CONFIG_BDI_SWITCH is not set
# CONFIG_BOOTX_TEXT is not set
# CONFIG_PPC_EARLY_DEBUG is not set
# end of powerpc Debugging

#
# Kernel Testing and Coverage
#
# CONFIG_KUNIT is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
# CONFIG_FAULT_INJECTION is not set
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
# CONFIG_RUNTIME_TESTING_MENU is not set
CONFIG_ARCH_USE_MEMTEST=y
# CONFIG_MEMTEST is not set
# end of Kernel Testing and Coverage

#
# Rust hacking
#
# end of Rust hacking
# end of Kernel hacking