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mm: Move vma_stack_continue into mm.h 

So it can be used by all that need to check for that.

Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Stefan Bader 2010-08-31 15:52:27 +02:00 committed by Linus Torvalds
parent 26a94e81de
commit 39aa3cb3e8
3 changed files with 8 additions and 7 deletions
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3
fs/proc/task_mmu.c
View File

@ -224,7 +224,8 @@ static void show_map_vma(struct seq_file *m, struct vm_area_struct *vma)
/* We don't show the stack guard page in /proc/maps */
start = vma->vm_start;
if (vma->vm_flags & VM_GROWSDOWN)
start += PAGE_SIZE;
if (!vma_stack_continue(vma->vm_prev, vma->vm_start))
start += PAGE_SIZE;
seq_printf(m, "%08lx-%08lx %c%c%c%c %08llx %02x:%02x %lu %n",
start,

6
include/linux/mm.h
View File

@ -864,6 +864,12 @@ int set_page_dirty(struct page *page);
int set_page_dirty_lock(struct page *page);
int clear_page_dirty_for_io(struct page *page);
/* Is the vma a continuation of the stack vma above it? */
static inline int vma_stack_continue(struct vm_area_struct *vma, unsigned long addr)
{
return vma && (vma->vm_end == addr) && (vma->vm_flags & VM_GROWSDOWN);
}
extern unsigned long move_page_tables(struct vm_area_struct *vma,
unsigned long old_addr, struct vm_area_struct *new_vma,
unsigned long new_addr, unsigned long len);

6
mm/mlock.c
View File

@ -135,12 +135,6 @@ void munlock_vma_page(struct page *page)
}
}
/* Is the vma a continuation of the stack vma above it? */
static inline int vma_stack_continue(struct vm_area_struct *vma, unsigned long addr)
{
return vma && (vma->vm_end == addr) && (vma->vm_flags & VM_GROWSDOWN);
}
static inline int stack_guard_page(struct vm_area_struct *vma, unsigned long addr)
{
return (vma->vm_flags & VM_GROWSDOWN) &&