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authorHugh Dickins <hugh@veritas.com>2009-01-06 22:39:25 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-06 23:59:02 (GMT)
commit51726b1222863852c46ca21ed0115b85d1edfd89 (patch)
treefb9d4de47a1ee860003bc4aa7c46651a77ae7b83 /mm/page_io.c
parent6d91add09f4bad5f4d4233b13faa392f0c4b16be (diff)
mm: replace some BUG_ONs by VM_BUG_ONs
The swap code is over-provisioned with BUG_ONs on assorted page flags, mostly dating back to 2.3. They're good documentation, and guard against developer error, but a waste of space on most systems: change them to VM_BUG_ONs, conditional on CONFIG_DEBUG_VM. Just delete the PagePrivate ones: they're later, from 2.5.69, but even less interesting now. Signed-off-by: Hugh Dickins <hugh@veritas.com> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_io.c')
-rw-r--r--mm/page_io.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_io.c b/mm/page_io.c
index 065c448..d277a80 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -125,8 +125,8 @@ int swap_readpage(struct file *file, struct page *page)
struct bio *bio;
int ret = 0;
- BUG_ON(!PageLocked(page));
- BUG_ON(PageUptodate(page));
+ VM_BUG_ON(!PageLocked(page));
+ VM_BUG_ON(PageUptodate(page));
bio = get_swap_bio(GFP_KERNEL, page_private(page), page,
end_swap_bio_read);
if (bio == NULL) {

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