diff options
author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:02:47 -0700 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-10-19 13:02:47 -0700 |
commit | dfc568e6bc08916f1035af456e4631c47166b5cf (patch) | |
tree | 3c96bdc26687e0f6958e790c8c93c0c6efb6b8d6 /include/linux/perf_event.h | |
parent | fdf91dae6f024c6dfee425fe754df6b1957f6c53 (diff) | |
parent | 31d141e3a666269a3b6fcccddb0351caf7454240 (diff) |
Merge 3.12-rc6 into char-misc-next
We want the fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r-- | include/linux/perf_event.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 866e85c5eb94..c8ba627c1d60 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -294,9 +294,31 @@ struct ring_buffer; */ struct perf_event { #ifdef CONFIG_PERF_EVENTS - struct list_head group_entry; + /* + * entry onto perf_event_context::event_list; + * modifications require ctx->lock + * RCU safe iterations. + */ struct list_head event_entry; + + /* + * XXX: group_entry and sibling_list should be mutually exclusive; + * either you're a sibling on a group, or you're the group leader. + * Rework the code to always use the same list element. + * + * Locked for modification by both ctx->mutex and ctx->lock; holding + * either sufficies for read. + */ + struct list_head group_entry; struct list_head sibling_list; + + /* + * We need storage to track the entries in perf_pmu_migrate_context; we + * cannot use the event_entry because of RCU and we want to keep the + * group in tact which avoids us using the other two entries. + */ + struct list_head migrate_entry; + struct hlist_node hlist_entry; int nr_siblings; int group_flags; |