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| author | Paul Mackerras <paulus@samba.org> | 2009-05-14 13:29:14 +1000 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-05-15 16:38:55 +0200 |
| commit | ef923214a4816c289e4af2d67a9ebb1a31e4ac61 (patch) | |
| tree | bf850f4f53a4f8391b6b9c0335e58364668586d9 /kernel/perf_counter.c | |
| parent | 2e569d36729c8105ae066a9b105068305442cc77 (diff) | |
| download | lwn-ef923214a4816c289e4af2d67a9ebb1a31e4ac61.tar.gz lwn-ef923214a4816c289e4af2d67a9ebb1a31e4ac61.zip | |
perf_counter: powerpc: use u64 for event codes internally
Although the perf_counter API allows 63-bit raw event codes,
internally in the powerpc back-end we had been using 32-bit
event codes. This expands them to 64 bits so that we can add
bits for specifying threshold start/stop events and instruction
sampling modes later.
This also corrects the return value of can_go_on_limited_pmc;
we were returning an event code rather than just a 0/1 value in
some circumstances. That didn't particularly matter while event
codes were 32-bit, but now that event codes are 64-bit it
might, so this fixes it.
[ Impact: extend PowerPC perfcounter interfaces from u32 to u64 ]
Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <18955.36874.472452.353104@drongo.ozlabs.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_counter.c')
0 files changed, 0 insertions, 0 deletions