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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>
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5 changed files with 18 additions and 20 deletions
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@ -87,8 +87,6 @@ extern struct kobj_attribute shmem_enabled_attr;
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#define HPAGE_PUD_SIZE ((1UL) << HPAGE_PUD_SHIFT)
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#define HPAGE_PUD_MASK (~(HPAGE_PUD_SIZE - 1))
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extern bool is_vma_temporary_stack(struct vm_area_struct *vma);
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extern unsigned long transparent_hugepage_flags;
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/*
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@ -100,7 +98,7 @@ static inline bool __transparent_hugepage_enabled(struct vm_area_struct *vma)
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if (vma->vm_flags & VM_NOHUGEPAGE)
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return false;
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if (is_vma_temporary_stack(vma))
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if (vma_is_temporary_stack(vma))
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return false;
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if (test_bit(MMF_DISABLE_THP, &vma->vm_mm->flags))
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@ -544,6 +544,20 @@ static inline bool vma_is_anonymous(struct vm_area_struct *vma)
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return !vma->vm_ops;
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}
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static inline bool vma_is_temporary_stack(struct vm_area_struct *vma)
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{
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int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);
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if (!maybe_stack)
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return false;
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if ((vma->vm_flags & VM_STACK_INCOMPLETE_SETUP) ==
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VM_STACK_INCOMPLETE_SETUP)
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return true;
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return false;
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}
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static inline bool vma_is_foreign(struct vm_area_struct *vma)
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{
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if (!current->mm)
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@ -421,7 +421,7 @@ static bool hugepage_vma_check(struct vm_area_struct *vma,
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}
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if (!vma->anon_vma || vma->vm_ops)
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return false;
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if (is_vma_temporary_stack(vma))
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if (vma_is_temporary_stack(vma))
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return false;
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return !(vm_flags & VM_NO_KHUGEPAGED);
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}
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@ -133,7 +133,7 @@ static void move_ptes(struct vm_area_struct *vma, pmd_t *old_pmd,
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* such races:
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*
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* - During exec() shift_arg_pages(), we use a specially tagged vma
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* which rmap call sites look for using is_vma_temporary_stack().
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* which rmap call sites look for using vma_is_temporary_stack().
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*
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* - During mremap(), new_vma is often known to be placed after vma
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* in rmap traversal order. This ensures rmap will always observe
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16
mm/rmap.c
16
mm/rmap.c
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@ -1699,23 +1699,9 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
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return ret;
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}
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bool is_vma_temporary_stack(struct vm_area_struct *vma)
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{
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int maybe_stack = vma->vm_flags & (VM_GROWSDOWN | VM_GROWSUP);
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if (!maybe_stack)
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return false;
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if ((vma->vm_flags & VM_STACK_INCOMPLETE_SETUP) ==
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VM_STACK_INCOMPLETE_SETUP)
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return true;
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return false;
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}
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static bool invalid_migration_vma(struct vm_area_struct *vma, void *arg)
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{
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return is_vma_temporary_stack(vma);
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return vma_is_temporary_stack(vma);
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}
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static int page_mapcount_is_zero(struct page *page)
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