[PATCH] perf: arm_spe: remove unnecessary zero check

The "nr_pages" variable has been checked before, it can't be zero, so a check here would be useless.

Signed-off-by: Liguang Zhang <redacted>
---
 drivers/perf/arm_spe_pmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index 4e4984a..b72c048 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c

@@ -831,7 +831,7 @@ static void *arm_spe_pmu_setup_aux(struct perf_event *event, void **pages,
 	 * parts and give userspace a fighting chance of getting some
 	 * useful data out of it.
 	 */
-	if (!nr_pages || (snapshot && (nr_pages & 1)))
+	if (snapshot && (nr_pages & 1))
 		return NULL;
 
 	if (cpu == -1)

-- 
1.8.3.1


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

On Wed, Feb 26, 2020 at 12:25:06PM +0800, luanshi wrote:

The "nr_pages" variable has been checked before, it can't be zero, so a check here would be useless.

Signed-off-by: Liguang Zhang <redacted>

As the commit message states, a  done:

| /* We need at least two pages for this to work. */
| if (nr_pages < 2)
|         return NULL;

... so this looks sensible to me:

Acked-by: Mark Rutland <mark.rutland@arm.com>

Mark.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel