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| author | Jonathan Corbet <corbet@lwn.net> | 2010-09-08 16:54:54 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-09 09:09:43 -0700 |
| commit | a73f8844e1fc54c3762555c1cf1f71774142ca91 (patch) | |
| tree | 6cf860dead41a30f5fac677f0cd478efad564c8f /arch/arm/kernel/perf_event.c | |
| parent | 39aa3cb3e8250db9188a6f1e3fb62ffa1a717678 (diff) | |
| download | linux-a73f8844e1fc54c3762555c1cf1f71774142ca91.tar.gz linux-a73f8844e1fc54c3762555c1cf1f71774142ca91.tar.bz2 linux-a73f8844e1fc54c3762555c1cf1f71774142ca91.zip | |
lglock: make lg_lock_global() actually lock globally
lg_lock_global() currently only acquires spinlocks for online CPUs, but
it's meant to lock all possible CPUs. Lglock-protected resources may be
associated with removed CPUs - and, indeed, that could happen with the
per-superblock open files lists.
At Nick's suggestion, change for_each_online_cpu() to
for_each_possible_cpu() to protect accesses to those resources.
Cc: Al Viro <viro@ZenIV.linux.org.uk>
Acked-by: Nick Piggin <npiggin@kernel.dk>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
0 files changed, 0 insertions, 0 deletions