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authorIngo Molnar <mingo@kernel.org>2019-04-16 12:14:46 +0200
committerIngo Molnar <mingo@kernel.org>2019-04-16 12:14:46 +0200
commitcc8670945d43f857dcb99c61ea3beaacfb6ed472 (patch)
tree9f75c5df1c2d46e2a48c06f9939cc5548715121e /kernel/events/core.c
parent496156e3647f44e2aab3e64f86b63294afca458a (diff)
parent9d5dcc93a6ddfc78124f006ccd3637ce070ef2fc (diff)
Merge branch 'perf/urgent' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events/core.c')
-rw-r--r--kernel/events/core.c37
1 files changed, 21 insertions, 16 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5262813583cc..30a572e4c6f1 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -9077,26 +9077,29 @@ static void perf_event_addr_filters_apply(struct perf_event *event)
if (task == TASK_TOMBSTONE)
return;
- if (!ifh->nr_file_filters)
- return;
-
- mm = get_task_mm(event->ctx->task);
- if (!mm)
- goto restart;
+ if (ifh->nr_file_filters) {
+ mm = get_task_mm(event->ctx->task);
+ if (!mm)
+ goto restart;
- down_read(&mm->mmap_sem);
+ down_read(&mm->mmap_sem);
+ }
raw_spin_lock_irqsave(&ifh->lock, flags);
list_for_each_entry(filter, &ifh->list, entry) {
- event->addr_filter_ranges[count].start = 0;
- event->addr_filter_ranges[count].size = 0;
+ if (filter->path.dentry) {
+ /*
+ * Adjust base offset if the filter is associated to a
+ * binary that needs to be mapped:
+ */
+ event->addr_filter_ranges[count].start = 0;
+ event->addr_filter_ranges[count].size = 0;
- /*
- * Adjust base offset if the filter is associated to a binary
- * that needs to be mapped:
- */
- if (filter->path.dentry)
perf_addr_filter_apply(filter, mm, &event->addr_filter_ranges[count]);
+ } else {
+ event->addr_filter_ranges[count].start = filter->offset;
+ event->addr_filter_ranges[count].size = filter->size;
+ }
count++;
}
@@ -9104,9 +9107,11 @@ static void perf_event_addr_filters_apply(struct perf_event *event)
event->addr_filters_gen++;
raw_spin_unlock_irqrestore(&ifh->lock, flags);
- up_read(&mm->mmap_sem);
+ if (ifh->nr_file_filters) {
+ up_read(&mm->mmap_sem);
- mmput(mm);
+ mmput(mm);
+ }
restart:
perf_event_stop(event, 1);