diff options
| author | Cody P Schafer <[email protected]> | 2013-02-22 16:35:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-02-23 17:50:20 -0800 |
| commit | d29bb9782d22063892e28716cdb76a87d2876ddb (patch) | |
| tree | 48c533b522cf65528c14ecfd2e7de7760badb192 | |
| parent | 2a6e3ebee2edcade56f836390a5f0c7b76ff5f9e (diff) | |
mm/page_alloc: add a VM_BUG in __free_one_page() if the zone is uninitialized.
Freeing pages to uninitialized zones is not handled by
__free_one_page(), and should never happen when the code is correct.
Ran into this while writing some code that dynamically onlines extra
zones.
Signed-off-by: Cody P Schafer <[email protected]>
Cc: David Hansen <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Mel Gorman <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
| -rw-r--r-- | mm/page_alloc.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index a3687afc5917..9614aabee8c5 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -538,6 +538,8 @@ static inline void __free_one_page(struct page *page, unsigned long uninitialized_var(buddy_idx); struct page *buddy; + VM_BUG_ON(!zone_is_initialized(zone)); + if (unlikely(PageCompound(page))) if (unlikely(destroy_compound_page(page, order))) return; |