diff options
| author | Hugh Dickins <[email protected]> | 2012-02-08 17:13:40 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-02-08 19:03:51 -0800 |
| commit | b9980cdcf2524c5fe15d8cbae9c97b3ed6385563 (patch) | |
| tree | 18295d2fe860bcdaae87138b44023abadfcd24d4 /tools/perf/scripts/python/Perf-Trace-Util/Context.c | |
| parent | ec44fd429879f7d4f28021f1a7f9fb0b5f831aab (diff) | |
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 'tools/perf/scripts/python/Perf-Trace-Util/Context.c')
0 files changed, 0 insertions, 0 deletions