diff options
| author | Anshuman Khandual | 2020-04-01 21:07:52 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2020-04-02 09:35:29 -0700 |
| commit | 222100eed264ba9d640af9977bffb6fcb6f11ea3 (patch) | |
| tree | 4eb02cbbcfc762576e7217baf1eaf84cb199e4f6 /include | |
| parent | 7969f2264f92871b9879796f08b455f737373718 (diff) | |
mm/vma: make is_vma_temporary_stack() available for general use
Currently the declaration and definition for is_vma_temporary_stack() are
scattered. Lets make is_vma_temporary_stack() helper available for
general use and also drop the declaration from (include/linux/huge_mm.h)
which is no longer required. While at this, rename this as
vma_is_temporary_stack() in line with existing helpers. This should not
cause any functional change.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1582782965-3274-4-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/huge_mm.h | 4 | ||||
| -rw-r--r-- | include/linux/mm.h | 14 |
2 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 5aca3d1bdb32..31c39f4a5518 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -87,8 +87,6 @@ extern struct kobj_attribute shmem_enabled_attr; #define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT) #define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1)) -extern bool is_vma_temporary_stack(struct vm_area_struct *vma); - extern unsigned long transparent_hugepage_flags; /* @@ -100,7 +98,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma) if (vma->vm_flags & VM_NOHUGEPAGE) return false; - if (is_vma_temporary_stack(vma)) + if (vma_is_temporary_stack(vma)) return false; if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags)) diff --git a/include/linux/mm.h b/include/linux/mm.h index 083e66f80709..12d194ec6422 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -544,6 +544,20 @@ static inline bool vma_is_anonymous(struct vm_area_struct *vma) return !vma->vm_ops; } +static inline bool vma_is_temporary_stack(struct vm_area_struct *vma) +{ + int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP); + + if (!maybe_stack) + return false; + + if ((vma->vm_flags & VM_STACK_INCOMPLETE_SETUP) == + VM_STACK_INCOMPLETE_SETUP) + return true; + + return false; +} + static inline bool vma_is_foreign(struct vm_area_struct *vma) { if (!current->mm) |