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authorNick Piggin <npiggin@suse.de>2006-09-25 23:30:55 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-26 08:48:44 -0700
commit725d704ecaca4a43f067092c140d4f3271cf2856 (patch)
tree320cf8ab5457ac6c01c05da8c30d6026538ee259 /mm/internal.h
parenta6ca1b99ed434f3fb41bbed647ed36c0420501e5 (diff)
downloadvexpress-lsk-725d704ecaca4a43f067092c140d4f3271cf2856.tar.gz
[PATCH] mm: VM_BUG_ON
Introduce a VM_BUG_ON, which is turned on with CONFIG_DEBUG_VM. Use this in the lightweight, inline refcounting functions; PageLRU and PageActive checks in vmscan, because they're pretty well confined to vmscan. And in page allocate/free fastpaths which can be the hottest parts of the kernel for kbuilds. Unlike BUG_ON, VM_BUG_ON must not be used to execute statements with side-effects, and should not be used outside core mm code. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Hugh Dickins <hugh@veritas.com> Cc: Christoph Lameter <clameter@engr.sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/internal.h')
-rw-r--r--mm/internal.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h
index d20e3cc4aef..d527b80b292 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -24,8 +24,8 @@ static inline void set_page_count(struct page *page, int v)
*/
static inline void set_page_refcounted(struct page *page)
{
- BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page);
- BUG_ON(atomic_read(&page->_count));
+ VM_BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page);
+ VM_BUG_ON(atomic_read(&page->_count));
set_page_count(page, 1);
}