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| author | Robert Richter <robert.richter@amd.com> | 2010-04-13 22:23:15 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2010-05-07 11:31:01 +0200 |
| commit | a1f2b70a942b8d858a0ab02567da3999b60a99b2 (patch) | |
| tree | 138457e3edf7d670eb0ad977b18a30be0110a355 /arch | |
| parent | 31fa58af57c41d2912debf62d47d5811062411f1 (diff) | |
| download | linux-stable-a1f2b70a942b8d858a0ab02567da3999b60a99b2.tar.gz linux-stable-a1f2b70a942b8d858a0ab02567da3999b60a99b2.tar.bz2 linux-stable-a1f2b70a942b8d858a0ab02567da3999b60a99b2.zip | |
perf, x86: Use weight instead of cmask in for_each_event_constraint()
There may exist constraints with a cmask set to zero. In this case
for_each_event_constraint() will not work properly. Now weight is used
instead of the cmask for loop exit detection. Weight is always a value
other than zero since the default contains the HWEIGHT from the
counter mask and in other cases a value of zero does not fit too.
This is in preparation of ibs event constraints that wont have a
cmask.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1271190201-25705-7-git-send-email-robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kernel/cpu/perf_event.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index 4e218d7ac852..4a3f1f2b9b91 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -170,7 +170,7 @@ struct cpu_hw_events { EVENT_CONSTRAINT(0, 0, 0) #define for_each_event_constraint(e, c) \ - for ((e) = (c); (e)->cmask; (e)++) + for ((e) = (c); (e)->weight; (e)++) union perf_capabilities { struct { |