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BWz9ZKnmsSfEgRJe8wxswpteApaKe8qJwthd2zDRoGKBnLlaGvKzPLjkLo4O2xfvbDVfZV9NGda Bx7bZA0jUcxoz1QMtEPaH37PILu0+DPOzO2tHsvm54Ap1invHbFflsw4SFnp6TX1Lhmo7vDmcJ1 +RO+Dy5y/h4IlKKswerUTD1qbe5l8mR630vhGOyMCFiSsh4WzldpD9KOciWUCKBTajezB/I0e7W irrw5R2TfDcHbx4Jft8smx2qo3JJtvWyCit0B6NZcIiOGAlrcLE= X-Authority-Analysis: v=2.4 cv=Dckaa/tW c=1 sm=1 tr=0 ts=6920ca5f b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=6UeiqGixMTsA:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=20KFwNOVAAAA:8 a=yPCof4ZbAAAA:8 a=Sf88-goebzjZ85YUTTQA:9 cc=ntf awl=host:12098 X-Proofpoint-GUID: WqhE1oTqpPgVY0pny2VH0-6iXJ2rW7DN X-Proofpoint-ORIG-GUID: WqhE1oTqpPgVY0pny2VH0-6iXJ2rW7DN Content-Type: text/plain; charset="utf-8" From: David Hildenbrand Let's drop all variants that effectively map to clear_page() and provide it in a generic variant instead. We'll use the macro clear_user_page to indicate whether an architecture provides it's own variant. We have to be a bit careful if an architecture provides a custom clear_user_highpage(), because then it's very likely that some special flushing magic is happening behind the scenes. Maybe at some point these should be CONFIG_ options. Note that for parisc, clear_page() and clear_user_page() map to clear_page_asm(), so we can just get rid of the custom clear_user_page() implementation. There is a clear_user_page_asm() function on parisc, that seems to be unused. Not sure what's up with that. Signed-off-by: David Hildenbrand Signed-off-by: Ankur Arora --- Notes: =20 - For architectures which have a specialized version of clear_user_page(= ), define clear_user_page instead of __HAVE_ARCH_CLEAR_USER_PAGE. - m68k/include/asm/page_mm.h, sparc/include/asm/page_32.h already define clear_user_page() as a macro so we just use that instead. arch/alpha/include/asm/page.h | 1 - arch/arc/include/asm/page.h | 2 ++ arch/arm/include/asm/page-nommu.h | 1 - arch/arm64/include/asm/page.h | 1 - arch/csky/abiv1/inc/abi/page.h | 1 + arch/csky/abiv2/inc/abi/page.h | 7 ------- arch/hexagon/include/asm/page.h | 1 - arch/loongarch/include/asm/page.h | 1 - arch/m68k/include/asm/page_no.h | 1 - arch/microblaze/include/asm/page.h | 1 - arch/mips/include/asm/page.h | 1 + arch/nios2/include/asm/page.h | 1 + arch/openrisc/include/asm/page.h | 1 - arch/parisc/include/asm/page.h | 1 - arch/powerpc/include/asm/page.h | 1 + arch/riscv/include/asm/page.h | 1 - arch/s390/include/asm/page.h | 1 - arch/sparc/include/asm/page_64.h | 1 + arch/um/include/asm/page.h | 1 - arch/x86/include/asm/page.h | 6 ------ arch/xtensa/include/asm/page.h | 1 - include/linux/mm.h | 22 ++++++++++++++++++++++ 22 files changed, 29 insertions(+), 26 deletions(-) diff --git a/arch/alpha/include/asm/page.h b/arch/alpha/include/asm/page.h index 5ec4c77e432e..d71ef845deca 100644 --- a/arch/alpha/include/asm/page.h +++ b/arch/alpha/include/asm/page.h @@ -11,7 +11,6 @@ #define STRICT_MM_TYPECHECKS =20 extern void clear_page(void *page); -#define clear_user_page(page, vaddr, pg) clear_page(page) =20 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \ vma_alloc_folio(GFP_HIGHUSER_MOVABLE | __GFP_ZERO, 0, vma, vaddr) diff --git a/arch/arc/include/asm/page.h b/arch/arc/include/asm/page.h index 9720fe6b2c24..38214e126c6d 100644 --- a/arch/arc/include/asm/page.h +++ b/arch/arc/include/asm/page.h @@ -32,6 +32,8 @@ struct page; =20 void copy_user_highpage(struct page *to, struct page *from, unsigned long u_vaddr, struct vm_area_struct *vma); + +#define clear_user_page clear_user_page void clear_user_page(void *to, unsigned long u_vaddr, struct page *page); =20 typedef struct { diff --git a/arch/arm/include/asm/page-nommu.h b/arch/arm/include/asm/page-= nommu.h index 7c2c72323d17..e74415c959be 100644 --- a/arch/arm/include/asm/page-nommu.h +++ b/arch/arm/include/asm/page-nommu.h @@ -11,7 +11,6 @@ #define clear_page(page) memset((page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 /* diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 258cca4b4873..0e8de245e283 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -36,7 +36,6 @@ struct folio *vma_alloc_zeroed_movable_folio(struct vm_ar= ea_struct *vma, bool tag_clear_highpages(struct page *to, int numpages); #define __HAVE_ARCH_TAG_CLEAR_HIGHPAGES =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 typedef struct page *pgtable_t; diff --git a/arch/csky/abiv1/inc/abi/page.h b/arch/csky/abiv1/inc/abi/page.h index 2d2159933b76..58307254e7e5 100644 --- a/arch/csky/abiv1/inc/abi/page.h +++ b/arch/csky/abiv1/inc/abi/page.h @@ -10,6 +10,7 @@ static inline unsigned long pages_do_alias(unsigned long = addr1, return (addr1 ^ addr2) & (SHMLBA-1); } =20 +#define clear_user_page clear_user_page static inline void clear_user_page(void *addr, unsigned long vaddr, struct page *page) { diff --git a/arch/csky/abiv2/inc/abi/page.h b/arch/csky/abiv2/inc/abi/page.h index cf005f13cd15..a5a255013308 100644 --- a/arch/csky/abiv2/inc/abi/page.h +++ b/arch/csky/abiv2/inc/abi/page.h @@ -1,11 +1,4 @@ /* SPDX-License-Identifier: GPL-2.0 */ - -static inline void clear_user_page(void *addr, unsigned long vaddr, - struct page *page) -{ - clear_page(addr); -} - static inline void copy_user_page(void *to, void *from, unsigned long vadd= r, struct page *page) { diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/pag= e.h index 137ba7c5de48..f0aed3ed812b 100644 --- a/arch/hexagon/include/asm/page.h +++ b/arch/hexagon/include/asm/page.h @@ -113,7 +113,6 @@ static inline void clear_page(void *page) /* * Under assumption that kernel always "sees" user map... */ -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 static inline unsigned long virt_to_pfn(const void *kaddr) diff --git a/arch/loongarch/include/asm/page.h b/arch/loongarch/include/asm= /page.h index a3aaf34fba16..b83415fe4ffb 100644 --- a/arch/loongarch/include/asm/page.h +++ b/arch/loongarch/include/asm/page.h @@ -30,7 +30,6 @@ extern void clear_page(void *page); extern void copy_page(void *to, void *from); =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 extern unsigned long shm_align_mask; diff --git a/arch/m68k/include/asm/page_no.h b/arch/m68k/include/asm/page_n= o.h index 39db2026a4b4..d2532bc407ef 100644 --- a/arch/m68k/include/asm/page_no.h +++ b/arch/m68k/include/asm/page_no.h @@ -10,7 +10,6 @@ extern unsigned long memory_end; #define clear_page(page) memset((page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((to), (from), PAGE_SIZE) =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \ diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/a= sm/page.h index 90ac9f34b4b4..e1e396367ba7 100644 --- a/arch/microblaze/include/asm/page.h +++ b/arch/microblaze/include/asm/page.h @@ -45,7 +45,6 @@ typedef unsigned long pte_basic_t; # define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) # define clear_page(pgaddr) memset((pgaddr), 0, PAGE_SIZE) =20 -# define clear_user_page(pgaddr, vaddr, page) memset((pgaddr), 0, PAGE_SIZ= E) # define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) =20 diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h index bc3e3484c1bf..5ec428fcc887 100644 --- a/arch/mips/include/asm/page.h +++ b/arch/mips/include/asm/page.h @@ -90,6 +90,7 @@ static inline void clear_user_page(void *addr, unsigned l= ong vaddr, if (pages_do_alias((unsigned long) addr, vaddr & PAGE_MASK)) flush_data_cache_page((unsigned long)addr); } +#define clear_user_page clear_user_page =20 struct vm_area_struct; extern void copy_user_highpage(struct page *to, struct page *from, diff --git a/arch/nios2/include/asm/page.h b/arch/nios2/include/asm/page.h index 00a51623d38a..722956ac0bf8 100644 --- a/arch/nios2/include/asm/page.h +++ b/arch/nios2/include/asm/page.h @@ -45,6 +45,7 @@ =20 struct page; =20 +#define clear_user_page clear_user_page extern void clear_user_page(void *addr, unsigned long vaddr, struct page *= page); extern void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *to); diff --git a/arch/openrisc/include/asm/page.h b/arch/openrisc/include/asm/p= age.h index 85797f94d1d7..d2cdbf3579bb 100644 --- a/arch/openrisc/include/asm/page.h +++ b/arch/openrisc/include/asm/page.h @@ -30,7 +30,6 @@ #define clear_page(page) memset((page), 0, PAGE_SIZE) #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 /* diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h index 8f4e51071ea1..3630b36d07da 100644 --- a/arch/parisc/include/asm/page.h +++ b/arch/parisc/include/asm/page.h @@ -21,7 +21,6 @@ struct vm_area_struct; =20 void clear_page_asm(void *page); void copy_page_asm(void *to, void *from); -#define clear_user_page(vto, vaddr, page) clear_page_asm(vto) void copy_user_highpage(struct page *to, struct page *from, unsigned long = vaddr, struct vm_area_struct *vma); #define __HAVE_ARCH_COPY_USER_HIGHPAGE diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/pag= e.h index b28fbb1d57eb..f2bb1f98eebe 100644 --- a/arch/powerpc/include/asm/page.h +++ b/arch/powerpc/include/asm/page.h @@ -271,6 +271,7 @@ static inline const void *pfn_to_kaddr(unsigned long pf= n) =20 struct page; extern void clear_user_page(void *page, unsigned long vaddr, struct page *= pg); +#define clear_user_page clear_user_page extern void copy_user_page(void *to, void *from, unsigned long vaddr, struct page *p); extern int devmem_is_allowed(unsigned long pfn); diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index ffe213ad65a4..061b60b954ec 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -50,7 +50,6 @@ void clear_page(void *page); #endif #define copy_page(to, from) memcpy((to), (from), PAGE_SIZE) =20 -#define clear_user_page(pgaddr, vaddr, page) clear_page(pgaddr) #define copy_user_page(vto, vfrom, vaddr, topg) \ memcpy((vto), (vfrom), PAGE_SIZE) =20 diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 9240a363c893..6635ba56d4b2 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -65,7 +65,6 @@ static inline void copy_page(void *to, void *from) : : "memory", "cc"); } =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 #define vma_alloc_zeroed_movable_folio(vma, vaddr) \ diff --git a/arch/sparc/include/asm/page_64.h b/arch/sparc/include/asm/page= _64.h index d764d8a8586b..fd4dc85fb38b 100644 --- a/arch/sparc/include/asm/page_64.h +++ b/arch/sparc/include/asm/page_64.h @@ -43,6 +43,7 @@ void _clear_page(void *page); #define clear_page(X) _clear_page((void *)(X)) struct page; void clear_user_page(void *addr, unsigned long vaddr, struct page *page); +#define clear_user_page clear_user_page #define copy_page(X,Y) memcpy((void *)(X), (void *)(Y), PAGE_SIZE) void copy_user_page(void *to, void *from, unsigned long vaddr, struct page= *topage); #define __HAVE_ARCH_COPY_USER_HIGHPAGE diff --git a/arch/um/include/asm/page.h b/arch/um/include/asm/page.h index 6f54254aaf44..8cea97a9c8f9 100644 --- a/arch/um/include/asm/page.h +++ b/arch/um/include/asm/page.h @@ -26,7 +26,6 @@ struct page; #define clear_page(page) memset((void *)(page), 0, PAGE_SIZE) #define copy_page(to,from) memcpy((void *)(to), (void *)(from), PAGE_SIZE) =20 -#define clear_user_page(page, vaddr, pg) clear_page(page) #define copy_user_page(to, from, vaddr, pg) copy_page(to, from) =20 typedef struct { unsigned long pte; } pte_t; diff --git a/arch/x86/include/asm/page.h b/arch/x86/include/asm/page.h index 9265f2fca99a..416dc88e35c1 100644 --- a/arch/x86/include/asm/page.h +++ b/arch/x86/include/asm/page.h @@ -22,12 +22,6 @@ struct page; extern struct range pfn_mapped[]; extern int nr_pfn_mapped; =20 -static inline void clear_user_page(void *page, unsigned long vaddr, - struct page *pg) -{ - clear_page(page); -} - static inline void copy_user_page(void *to, void *from, unsigned long vadd= r, struct page *topage) { diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h index 20655174b111..059493256765 100644 --- a/arch/xtensa/include/asm/page.h +++ b/arch/xtensa/include/asm/page.h @@ -126,7 +126,6 @@ void clear_user_highpage(struct page *page, unsigned lo= ng vaddr); void copy_user_highpage(struct page *to, struct page *from, unsigned long vaddr, struct vm_area_struct *vma); #else -# define clear_user_page(page, vaddr, pg) clear_page(page) # define copy_user_page(to, from, vaddr, pg) copy_page(to, from) #endif =20 diff --git a/include/linux/mm.h b/include/linux/mm.h index 7c79b3369b82..6fa6c188f99a 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -3879,6 +3879,28 @@ static inline void clear_page_guard(struct zone *zon= e, struct page *page, unsigned int order) {} #endif /* CONFIG_DEBUG_PAGEALLOC */ =20 +#ifndef clear_user_page +/** + * clear_user_page() - clear a page to be mapped to user space + * @addr: the address of the page + * @vaddr: the address of the user mapping + * @page: the page + */ +static inline void clear_user_page(void *addr, unsigned long vaddr, struct= page *page) +{ +#ifdef clear_user_highpage + /* + * If an architecture defines its own clear_user_highpage() variant, + * then we have to be a bit more careful here and cannot simply + * rely on clear_page(). + */ + clear_user_highpage(page, vaddr); +#else + clear_page(addr); +#endif +} +#endif + #ifdef __HAVE_ARCH_GATE_AREA extern struct vm_area_struct *get_gate_vma(struct mm_struct *mm); extern int in_gate_area_no_mm(unsigned long addr); --=20 2.31.1