mm: replace some BUG_ONs by VM_BUG_ONs

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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>

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This commit is contained in:

Hugh Dickins 2009-01-06 14:39:25 -08:00 • committed by Linus Torvalds

parent 6d91add09f

commit 51726b1222

3 changed files with 14 additions and 17 deletions

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4

mm/page_io.c

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19

mm/swap_state.c

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8

mm/swapfile.c

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