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authorAndy Lutomirski <luto@amacapital.net>2014-10-24 15:58:10 -0700
committerIngo Molnar <mingo@kernel.org>2015-02-04 12:10:45 +0100
commit1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb (patch)
tree1f956e500f6793fba62fd528134310253edda76c /kernel/events
parent22c4bd9fa921c2b1b3f2420d7b9dabbe982f3059 (diff)
downloadlinux-1e0fb9ec679c9273a641f1d6f3d25ea47baef2bb.tar.bz2
perf: Add pmu callbacks to track event mapping and unmapping
Signed-off-by: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Kees Cook <keescook@chromium.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Vince Weaver <vince@deater.net> Cc: "hillf.zj" <hillf.zj@alibaba-inc.com> Cc: Valdis Kletnieks <Valdis.Kletnieks@vt.edu> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: http://lkml.kernel.org/r/266afcba1d1f91ea5501e4e16e94bbbc1a9339b6.1414190806.git.luto@amacapital.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 7f2fbb8b5069..cc1487145d33 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4293,6 +4293,9 @@ static void perf_mmap_open(struct vm_area_struct *vma)
atomic_inc(&event->mmap_count);
atomic_inc(&event->rb->mmap_count);
+
+ if (event->pmu->event_mapped)
+ event->pmu->event_mapped(event);
}
/*
@@ -4312,6 +4315,9 @@ static void perf_mmap_close(struct vm_area_struct *vma)
int mmap_locked = rb->mmap_locked;
unsigned long size = perf_data_size(rb);
+ if (event->pmu->event_unmapped)
+ event->pmu->event_unmapped(event);
+
atomic_dec(&rb->mmap_count);
if (!atomic_dec_and_mutex_lock(&event->mmap_count, &event->mmap_mutex))
@@ -4513,6 +4519,9 @@ unlock:
vma->vm_flags |= VM_DONTCOPY | VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_ops = &perf_mmap_vmops;
+ if (event->pmu->event_mapped)
+ event->pmu->event_mapped(event);
+
return ret;
}