diff options
author | Avi Kivity <avi@redhat.com> | 2011-06-29 11:42:35 -0400 |
---|---|---|
committer | Ingo Molnar <mingo@elte.hu> | 2011-07-01 05:06:38 -0400 |
commit | 4dc0da86967d5463708631d02a70cfed5b104884 (patch) | |
tree | e09071a62f2457b710ff69df3be1bff39340a4c6 /arch/powerpc/kernel/ptrace.c | |
parent | 89d6c0b5bdbb1927775584dcf532d98b3efe1477 (diff) |
perf: Add context field to perf_event
The perf_event overflow handler does not receive any caller-derived
argument, so many callers need to resort to looking up the perf_event
in their local data structure. This is ugly and doesn't scale if a
single callback services many perf_events.
Fix by adding a context parameter to perf_event_create_kernel_counter()
(and derived hardware breakpoints APIs) and storing it in the perf_event.
The field can be accessed from the callback as event->overflow_handler_context.
All callers are updated.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1309362157-6596-2-git-send-email-avi@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/powerpc/kernel/ptrace.c')
-rw-r--r-- | arch/powerpc/kernel/ptrace.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c index 3177617af2ef..05b7dd217f60 100644 --- a/arch/powerpc/kernel/ptrace.c +++ b/arch/powerpc/kernel/ptrace.c | |||
@@ -973,7 +973,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr, | |||
973 | &attr.bp_type); | 973 | &attr.bp_type); |
974 | 974 | ||
975 | thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr, | 975 | thread->ptrace_bps[0] = bp = register_user_hw_breakpoint(&attr, |
976 | ptrace_triggered, task); | 976 | ptrace_triggered, NULL, task); |
977 | if (IS_ERR(bp)) { | 977 | if (IS_ERR(bp)) { |
978 | thread->ptrace_bps[0] = NULL; | 978 | thread->ptrace_bps[0] = NULL; |
979 | ptrace_put_breakpoints(task); | 979 | ptrace_put_breakpoints(task); |