ARM: 6469/1: perf-events: squash compiler warning

armv7_pmnc_counter_has_overflowed can return uninitialised data
if an invalid counter is specified.

This patch fixes the code to return 0 in this case, which squashes
the compiler warning from GCC 4.5.

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 49643b1..07a5035 100644 (file)
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -1749,7 +1749,7 @@ static inline int armv7_pmnc_has_overflowed(unsigned long pmnc)
 static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc,
                                        enum armv7_counters counter)
 {
-       int ret;
+       int ret = 0;
 
        if (counter == ARMV7_CYCLE_COUNTER)
                ret = pmnc & ARMV7_FLAG_C;