perf: Export perf_event_update_userpage

BugLink: https://launchpad.net/bugs/1811200
Export perf_event_update_userpage() so that PMU driver using them,
can be built as modules.

Acked-by: Peter Zilstra <peterz@infradead.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
(cherry picked from commit 82975c46da8275a2a212cd94049bbef9bb961da2)
Signed-off-by: Ike Panhc <ike.pan@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0041bce2cf997f8b28e0bf176d1a4dec170ca2fb..7eeabaebc225cd80e2619557895c7af25878d17b 100644 (file)
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4958,6 +4958,7 @@ void perf_event_update_userpage(struct perf_event *event)
 unlock:
        rcu_read_unlock();
 }
+EXPORT_SYMBOL_GPL(perf_event_update_userpage);
 
 static int perf_mmap_fault(struct vm_fault *vmf)
 {