From e9a81a821d7f9c5d899cc3acdeafbd884c2c48bb Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Tue, 26 Oct 2010 14:22:01 -0700 Subject: [PATCH] rmap: wrap page_check_address() using __cond_lock() The page_check_address() conditionally grabs *@ptlp in case of returning non-NULL. Rename and wrap it using __cond_lock() removes following warnings from sparse: mm/rmap.c:472:9: warning: context imbalance in 'page_mapped_in_vma' - unexpected unlock mm/rmap.c:524:9: warning: context imbalance in 'page_referenced_one' - unexpected unlock mm/rmap.c:706:9: warning: context imbalance in 'page_mkclean_one' - unexpected unlock mm/rmap.c:1066:9: warning: context imbalance in 'try_to_unmap_one' - unexpected unlock Signed-off-by: Namhyung Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/rmap.h | 13 ++++++++++++- mm/rmap.c | 2 +- 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/include/linux/rmap.h b/include/linux/rmap.h index 07ea89c16761..bb83c0da2071 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -205,9 +205,20 @@ int try_to_unmap_one(struct page *, struct vm_area_struct *, /* * Called from mm/filemap_xip.c to unmap empty zero page */ -pte_t *page_check_address(struct page *, struct mm_struct *, +pte_t *__page_check_address(struct page *, struct mm_struct *, unsigned long, spinlock_t **, int); +static inline pte_t *page_check_address(struct page *page, struct mm_struct *mm, + unsigned long address, + spinlock_t **ptlp, int sync) +{ + pte_t *ptep; + + __cond_lock(*ptlp, ptep = __page_check_address(page, mm, address, + ptlp, sync)); + return ptep; +} + /* * Used by swapoff to help locate where page is expected in vma. */ diff --git a/mm/rmap.c b/mm/rmap.c index 0995a8f68866..bfeffbddb712 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -409,7 +409,7 @@ unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma) * * On success returns with pte mapped and locked. */ -pte_t *page_check_address(struct page *page, struct mm_struct *mm, +pte_t *__page_check_address(struct page *page, struct mm_struct *mm, unsigned long address, spinlock_t **ptlp, int sync) { pgd_t *pgd; -- 2.30.2