linux-kernel - [PATCH] perf: arm_spe: remove unnecessary zero check

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Message-Id: <1582691106-3432-1-git-send-email-zhangliguang@linux.alibaba.com>
Date:   Wed, 26 Feb 2020 12:25:06 +0800
From:   luanshi <zhangliguang@...ux.alibaba.com>
To:     Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        luanshi <zhangliguang@...ux.alibaba.com>
Subject: [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 <zhangliguang@...ux.alibaba.com>
---
 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