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Message-Id: <20240126061319.245901-1-lizhijian@fujitsu.com>
Date: Fri, 26 Jan 2024 14:13:16 +0800
From: Li Zhijian <lizhijian@...itsu.com>
To: linux-kernel@...r.kernel.org
Cc: Li Zhijian <lizhijian@...itsu.com>,
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>,
Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
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>
Subject: [PATCH v2 1/4] arch/x86/events/amd: Convert snprintf/sprintf to sysfs_emit
Per filesystems/sysfs.rst, show() should only use sysfs_emit()
or sysfs_emit_at() when formatting the value to be returned to user space.
coccinelle complains that there are still a couple of functions that use
snprintf(). Convert them to sysfs_emit().
> ./arch/x86/events/amd/core.c:1282:8-16: WARNING: please use sysfs_emit
This patch is generated by
$ make coccicheck MODE=patch COCCI=scripts/coccinelle/api/device_attr_show.cocci M=arch/x86/events/amd | sed -n '6,$p' | patch -p1
No functional change intended
CC: Peter Zijlstra <peterz@...radead.org>
CC: Ingo Molnar <mingo@...hat.com>
CC: Arnaldo Carvalho de Melo <acme@...nel.org>
CC: Mark Rutland <mark.rutland@....com>
CC: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
CC: Jiri Olsa <jolsa@...nel.org>
CC: Namhyung Kim <namhyung@...nel.org>
CC: Ian Rogers <irogers@...gle.com>
CC: Adrian Hunter <adrian.hunter@...el.com>
CC: Thomas Gleixner <tglx@...utronix.de>
CC: Borislav Petkov <bp@...en8.de>
CC: Dave Hansen <dave.hansen@...ux.intel.com>
CC: x86@...nel.org
CC: "H. Peter Anvin" <hpa@...or.com>
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V2: extract patch from the patch set[1] so that maintainer can accept it separately.
[1] https://lore.kernel.org/lkml/20240116041129.3937800-1-lizhijian@fujitsu.com/
---
arch/x86/events/amd/core.c | 2 +-
arch/x86/events/amd/iommu.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 81f6d8275b6b..0d520592010c 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -1279,7 +1279,7 @@ static ssize_t branches_show(struct device *cdev,
struct device_attribute *attr,
char *buf)
{
- return snprintf(buf, PAGE_SIZE, "%d\n", x86_pmu.lbr_nr);
+ return sysfs_emit(buf, "%d\n", x86_pmu.lbr_nr);
}
static DEVICE_ATTR_RO(branches);
diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index b15f7b950d2e..1126bda96d8f 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -89,7 +89,7 @@ static ssize_t _iommu_event_show(struct device *dev,
{
struct amd_iommu_event_desc *event =
container_of(attr, struct amd_iommu_event_desc, attr);
- return sprintf(buf, "%s\n", event->event);
+ return sysfs_emit(buf, "%s\n", event->event);
}
#define AMD_IOMMU_EVENT_DESC(_name, _event) \
--
2.29.2
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