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| author | Hugh Dickins <[email protected]> | 2012-02-09 01:13:40 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-02-09 03:03:51 +0000 |
| commit | b9980cdcf2524c5fe15d8cbae9c97b3ed6385563 (patch) | |
| tree | 18295d2fe860bcdaae87138b44023abadfcd24d4 /lib/syscall.c | |
| parent | drivers/leds/leds-lm3530.c: fix setting pltfm->als_vmax (diff) | |
| download | kernel-b9980cdcf2524c5fe15d8cbae9c97b3ed6385563.tar.gz kernel-b9980cdcf2524c5fe15d8cbae9c97b3ed6385563.zip | |
mm: fix UP THP spin_is_locked BUGs
Fix CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_SMP=n CONFIG_DEBUG_VM=y
CONFIG_DEBUG_SPINLOCK=n kernel: spin_is_locked() is then always false,
and so triggers some BUGs in Transparent HugePage codepaths.
asm-generic/bug.h mentions this problem, and provides a WARN_ON_SMP(x);
but being too lazy to add VM_BUG_ON_SMP, BUG_ON_SMP, WARN_ON_SMP_ONCE,
VM_WARN_ON_SMP_ONCE, just test NR_CPUS != 1 in the existing VM_BUG_ONs.
Signed-off-by: Hugh Dickins <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/syscall.c')
0 files changed, 0 insertions, 0 deletions