[PATCH v2 1/4] arch/x86/events/amd: Convert snprintf/sprintf to sysfs_emit

[Li Zhijian]

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@xxxxxxxxxxxxx>
CC: Ingo Molnar <mingo@xxxxxxxxxx>
CC: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CC: Mark Rutland <mark.rutland@xxxxxxx>
CC: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
CC: Jiri Olsa <jolsa@xxxxxxxxxx>
CC: Namhyung Kim <namhyung@xxxxxxxxxx>
CC: Ian Rogers <irogers@xxxxxxxxxx>
CC: Adrian Hunter <adrian.hunter@xxxxxxxxx>
CC: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CC: Borislav Petkov <bp@xxxxxxxxx>
CC: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CC: x86@xxxxxxxxxx
CC: "H. Peter Anvin" <hpa@xxxxxxxxx>
Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
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@xxxxxxxxxxx/
---
 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