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mm: add lock release annotation on do_wp_page()

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The do_wp_page() releases @ptl but was missing proper annotation.  Add it.
 This removes following warnings from sparse:

 mm/memory.c:2337:9: warning: context imbalance in 'do_wp_page' - unexpected unlock
 mm/memory.c:3142:19: warning: context imbalance in 'handle_mm_fault' - different lock contexts for basic block

Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Namhyung Kim 2010-10-26 14:22:00 -07:00 committed by Linus Torvalds
parent 25ca1d6c02
commit e6219ec819
1 changed files with 1 additions and 0 deletions
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mm/memory.c
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@ -2108,6 +2108,7 @@ static inline void cow_user_page(struct page *dst, struct page *src, unsigned lo
static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
unsigned long address, pte_t *page_table, pmd_t *pmd,
spinlock_t *ptl, pte_t orig_pte)
__releases(ptl)
{
struct page *old_page, *new_page;
pte_t entry;