diff options
author | Con Kolivas <kernel@kolivas.org> | 2016-12-12 10:56:17 +1100 |
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committer | Con Kolivas <kernel@kolivas.org> | 2016-12-12 10:56:17 +1100 |
commit | c3e1d5cbf048128fa788513fbc5fa3036c85fcb0 (patch) | |
tree | 4b2b38cc960963abc48b2e30c6e2415ee383c98d /kernel/events/core.c | |
parent | e4d2e01f84338d948be51202038842fe3e0f6ce9 (diff) | |
parent | 69973b830859bc6529a7a0468ba0d80ee5117826 (diff) |
Merge tag 'v4.9' into 4.9-muqss4.9-muqss-150
Linux 4.9
Diffstat (limited to 'kernel/events/core.c')
-rw-r--r-- | kernel/events/core.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index 6ee1febdf6ff..02c8421f8c01 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -903,17 +903,14 @@ list_update_cgroup_event(struct perf_event *event, */ cpuctx = __get_cpu_context(ctx); - /* Only set/clear cpuctx->cgrp if current task uses event->cgrp. */ - if (perf_cgroup_from_task(current, ctx) != event->cgrp) { - /* - * We are removing the last cpu event in this context. - * If that event is not active in this cpu, cpuctx->cgrp - * should've been cleared by perf_cgroup_switch. - */ - WARN_ON_ONCE(!add && cpuctx->cgrp); - return; - } - cpuctx->cgrp = add ? event->cgrp : NULL; + /* + * cpuctx->cgrp is NULL until a cgroup event is sched in or + * ctx->nr_cgroup == 0 . + */ + if (add && perf_cgroup_from_task(current, ctx) == event->cgrp) + cpuctx->cgrp = event->cgrp; + else if (!add) + cpuctx->cgrp = NULL; } #else /* !CONFIG_CGROUP_PERF */ |