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| author | Hugh Dickins <hugh@veritas.com> | 2009-01-06 14:39:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:02 -0800 |
| commit | 51726b1222863852c46ca21ed0115b85d1edfd89 (patch) | |
| tree | fb9d4de47a1ee860003bc4aa7c46651a77ae7b83 /mm/page_io.c | |
| parent | 6d91add09f4bad5f4d4233b13faa392f0c4b16be (diff) | |
| download | lwn-51726b1222863852c46ca21ed0115b85d1edfd89.tar.gz lwn-51726b1222863852c46ca21ed0115b85d1edfd89.zip | |
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.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_io.c b/mm/page_io.c index 065c4480eaf0..d277a80efa71 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) { |