ARM: 7441/1: perf: return -EOPNOTSUPP if requested mode exclusion is unavailable

We currently return -EPERM if the user requests mode exclusion that is
not supported by the CPU. This looks pretty confusing from userspace
and is inconsistent with other architectures (ppc, x86).

This patch returns -EOPNOTSUPP instead.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 186c8cb982c543a2cc1631796b34376151b33702..a02eada3aa5d06036027ac1241e652d5032781bd 100644 (file)
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -503,7 +503,7 @@ __hw_perf_event_init(struct perf_event *event)
             event_requires_mode_exclusion(&event->attr)) {
                pr_debug("ARM performance counters do not support "
                         "mode exclusion\n");
-               return -EPERM;
+               return -EOPNOTSUPP;
        }
 
        /*