diff options
Diffstat (limited to 'mm/debug-pagealloc.c')
| -rw-r--r-- | mm/debug-pagealloc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/debug-pagealloc.c b/mm/debug-pagealloc.c index 5bf5906ce13b..3b8f1b83610e 100644 --- a/mm/debug-pagealloc.c +++ b/mm/debug-pagealloc.c @@ -34,6 +34,8 @@ static inline void set_page_poison(struct page *page) struct page_ext *page_ext; page_ext = lookup_page_ext(page); + if (!page_ext) + return; __set_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags); } @@ -42,6 +44,8 @@ static inline void clear_page_poison(struct page *page) struct page_ext *page_ext; page_ext = lookup_page_ext(page); + if (!page_ext) + return; __clear_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags); } @@ -50,6 +54,8 @@ static inline bool page_poison(struct page *page) struct page_ext *page_ext; page_ext = lookup_page_ext(page); + if (!page_ext) + return false; return test_bit(PAGE_EXT_DEBUG_POISON, &page_ext->flags); } |