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charset="utf-8" From: Khalid Aziz An mshare region contains zero or more actual vmas that map objects in the mshare range with shared page tables. Signed-off-by: Khalid Aziz Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Anthony Yznaga --- include/linux/mm.h | 19 +++++++++++++++++++ include/trace/events/mmflags.h | 7 +++++++ 2 files changed, 26 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 778f5de6a12e..f2f9d15213ab 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -414,6 +414,13 @@ extern unsigned int kobjsize(const void *objp); #define VM_DROPPABLE VM_NONE #endif =20 +#ifdef CONFIG_MSHARE +#define VM_MSHARE_BIT 41 +#define VM_MSHARE BIT(VM_MSHARE_BIT) +#else +#define VM_MSHARE VM_NONE +#endif + #ifdef CONFIG_64BIT /* VM is sealed, in vm_flags */ #define VM_SEALED _BITUL(63) @@ -1161,6 +1168,18 @@ static inline bool vma_is_anon_shmem(struct vm_area_= struct *vma) { return false; =20 int vma_is_stack_for_current(struct vm_area_struct *vma); =20 +#ifdef CONFIG_MSHARE +static inline bool vma_is_mshare(const struct vm_area_struct *vma) +{ + return vma->vm_flags & VM_MSHARE; +} +#else +static inline bool vma_is_mshare(const struct vm_area_struct *vma) +{ + return false; +} +#endif + /* flush_tlb_range() takes a vma, not a mm, and can care about flags */ #define TLB_FLUSH_VMA(mm,flags) { .vm_mm =3D (mm), .vm_flags =3D (flags) } =20 diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h index 15aae955a10b..02ebd354ed55 100644 --- a/include/trace/events/mmflags.h +++ b/include/trace/events/mmflags.h @@ -202,6 +202,12 @@ IF_HAVE_PG_ARCH_3(arch_3) # define IF_HAVE_VM_DROPPABLE(flag, name) #endif =20 +#ifdef CONFIG_MSHARE +# define IF_HAVE_VM_MSHARE(flag, name) {flag, name}, +#else +# define IF_HAVE_VM_MSHARE(flag, name) +#endif + #define __def_vmaflag_names \ {VM_READ, "read" }, \ {VM_WRITE, "write" }, \ @@ -235,6 +241,7 @@ IF_HAVE_VM_SOFTDIRTY(VM_SOFTDIRTY, "softdirty" ) \ {VM_HUGEPAGE, "hugepage" }, \ {VM_NOHUGEPAGE, "nohugepage" }, \ IF_HAVE_VM_DROPPABLE(VM_DROPPABLE, "droppable" ) \ +IF_HAVE_VM_MSHARE(VM_MSHARE, "mshare" ) \ {VM_MERGEABLE, "mergeable" } \ =20 #define show_vma_flags(flags) \ --=20 2.43.5