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| author |   Chintan Pandya <cpandya@codeaurora.org> | 2014-08-06 16:08:18 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-06 18:01:22 -0700 |
| commit | 1d352bfd41e8219cdf9bebe79677700bdc38b540 (patch) | |
| tree | d2e3e21f7dd702ddd65f0d57ce931d6162303960 /include/linux/mmu_notifier.h | |
| parent | mm: memcontrol: clean up reclaim size variable use in try_charge() (diff) | |
| download | linux-dev-1d352bfd41e8219cdf9bebe79677700bdc38b540.tar.xz linux-dev-1d352bfd41e8219cdf9bebe79677700bdc38b540.zip | |
mm: BUG when __kmap_atomic_idx equals KM_TYPE_NR
__kmap_atomic_idx is per_cpu variable. Each CPU can use KM_TYPE_NR
entries from FIXMAP i.e. from 0 to KM_TYPE_NR - 1. Allowing
__kmap_atomic_idx to over- shoot to KM_TYPE_NR can mess up with next
CPU's 0th entry which is a bug. Hence BUG_ON if __kmap_atomic_idx >=
KM_TYPE_NR.
Fix the off-by-on in this test.
Signed-off-by: Chintan Pandya <cpandya@codeaurora.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/mmu_notifier.h')
0 files changed, 0 insertions, 0 deletions