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| author | Konstantin Khlebnikov <khlebnikov@openvz.org> | 2012-05-29 15:06:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 16:22:20 -0700 |
| commit | 02602a18c32d76f0e0f50eefa91b2d53c8a3a751 (patch) | |
| tree | 64a2645d05cd57731e7d2f5bd0ef390de8b5e76b /arch/x86/kernel/e820.c | |
| parent | baf05aa9271bdbc07d3160035a231abc5fbd429a (diff) | |
| download | op-kernel-dev-02602a18c32d76f0e0f50eefa91b2d53c8a3a751.zip op-kernel-dev-02602a18c32d76f0e0f50eefa91b2d53c8a3a751.tar.gz | |
bug: completely remove code generated by disabled VM_BUG_ON()
Even if CONFIG_DEBUG_VM=n gcc genereates code for some VM_BUG_ON()
for example VM_BUG_ON(!PageCompound(page) || !PageHead(page)); in
do_huge_pmd_wp_page() generates 114 bytes of code.
But they mostly disappears when I split this VM_BUG_ON into two:
-VM_BUG_ON(!PageCompound(page) || !PageHead(page));
+VM_BUG_ON(!PageCompound(page));
+VM_BUG_ON(!PageHead(page));
weird... but anyway after this patch code disappears completely.
add/remove: 0/0 grow/shrink: 7/97 up/down: 135/-1784 (-1649)
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86/kernel/e820.c')
0 files changed, 0 insertions, 0 deletions
