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| author |   Frederic Weisbecker <fweisbec@gmail.com> | 2010-04-15 23:10:42 +0200 |
|---|---|---|
| committer | Frederic Weisbecker <fweisbec@gmail.com> | 2010-04-30 19:15:49 +0200 |
| commit | 8795d7717c467bea7b0a0649d44a258e09f34db2 (patch) | |
| tree | 33d0dc56ef918bfc7dd615162be20e77899147c5 /tools/perf/scripts/python/syscall-counts.py | |
| parent | Merge commit 'v2.6.34-rc6' into core/locking (diff) | |
| download | linux-dev-8795d7717c467bea7b0a0649d44a258e09f34db2.tar.xz linux-dev-8795d7717c467bea7b0a0649d44a258e09f34db2.zip | |
lockdep: Fix redundant_hardirqs_on incremented with irqs enabled
When a path restore the flags while irqs are already enabled, we
update the per cpu var redundant_hardirqs_on in a racy fashion
and debug_atomic_inc() warns about this situation.
In this particular case, loosing a few hits in a stat is not a big
deal, so increment it without protection.
v2: Don't bother with disabling irq, we can miss one count in
rare situations
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Miller <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions