linux-kernel - [PATCH] perf/x86/rapl: use NULL for a null pointer rather than zero

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Message-Id: <20220627165030.146986-1-colin.i.king@gmail.com>
Date:   Mon, 27 Jun 2022 17:50:30 +0100
From:   Colin Ian King <colin.i.king@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H . Peter Anvin" <hpa@...or.com>, linux-perf-users@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] perf/x86/rapl: use NULL for a null pointer rather than zero

There are pointers being initialized with a zero, use NULL instead.

Cleans up sparse warnings:
arch/x86/events/rapl.c:540:59: warning: Using plain integer as NULL pointer
arch/x86/events/rapl.c:542:59: warning: Using plain integer as NULL pointer
arch/x86/events/rapl.c:543:59: warning: Using plain integer as NULL pointer
arch/x86/events/rapl.c:544:59: warning: Using plain integer as NULL pointer

Signed-off-by: Colin Ian King <colin.i.king@...il.com>
---
 arch/x86/events/rapl.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c
index 77e3a47af5ad..7d70690fded5 100644
--- a/arch/x86/events/rapl.c
+++ b/arch/x86/events/rapl.c
@@ -537,11 +537,11 @@ static struct perf_msr intel_rapl_spr_msrs[] = {
  * - want to use same event codes across both architectures
  */
 static struct perf_msr amd_rapl_msrs[] = {
-	[PERF_RAPL_PP0]  = { 0, &rapl_events_cores_group, 0, false, 0 },
+	[PERF_RAPL_PP0]  = { 0, &rapl_events_cores_group, NULL, false, 0 },
 	[PERF_RAPL_PKG]  = { MSR_AMD_PKG_ENERGY_STATUS,  &rapl_events_pkg_group,   test_msr, false, RAPL_MSR_MASK },
-	[PERF_RAPL_RAM]  = { 0, &rapl_events_ram_group,   0, false, 0 },
-	[PERF_RAPL_PP1]  = { 0, &rapl_events_gpu_group,   0, false, 0 },
-	[PERF_RAPL_PSYS] = { 0, &rapl_events_psys_group,  0, false, 0 },
+	[PERF_RAPL_RAM]  = { 0, &rapl_events_ram_group,   NULL, false, 0 },
+	[PERF_RAPL_PP1]  = { 0, &rapl_events_gpu_group,   NULL, false, 0 },
+	[PERF_RAPL_PSYS] = { 0, &rapl_events_psys_group,  NULL, false, 0 },
 };
 
 static int rapl_cpu_offline(unsigned int cpu)
-- 
2.35.3