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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2023-09-23 09:15:38 +0200 |
|---|---|---|
| committer | Lee Jones <lee@kernel.org> | 2023-11-01 11:28:51 +0000 |
| commit | ff50f53276131a3059e8307d11293af388ed2bcd (patch) | |
| tree | 76c8d34a0388d9464dd7e8868eea36051d73dbbe /drivers/leds/trigger/ledtrig-cpu.c | |
| parent | 76fe464c8e64e71b2e4af11edeef0e5d85eeb6aa (diff) | |
| download | linux-ff50f53276131a3059e8307d11293af388ed2bcd.tar.gz linux-ff50f53276131a3059e8307d11293af388ed2bcd.tar.bz2 linux-ff50f53276131a3059e8307d11293af388ed2bcd.zip | |
leds: trigger: ledtrig-cpu:: Fix 'output may be truncated' issue for 'cpu'
In order to teach the compiler that 'trig->name' will never be truncated,
we need to tell it that 'cpu' is not negative.
When building with W=1, this fixes the following warnings:
drivers/leds/trigger/ledtrig-cpu.c: In function ‘ledtrig_cpu_init’:
drivers/leds/trigger/ledtrig-cpu.c:155:56: error: ‘%d’ directive output may be truncated writing between 1 and 11 bytes into a region of size 5 [-Werror=format-truncation=]
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~
drivers/leds/trigger/ledtrig-cpu.c:155:52: note: directive argument in the range [-2147483648, 7]
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~~~~~~
drivers/leds/trigger/ledtrig-cpu.c:155:17: note: ‘snprintf’ output between 5 and 15 bytes into a destination of size 8
155 | snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: 8f88731d052d ("led-triggers: create a trigger for CPU activity")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/3f4be7a99933cf8566e630da54f6ab913caac432.1695453322.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Lee Jones <lee@kernel.org>
Diffstat (limited to 'drivers/leds/trigger/ledtrig-cpu.c')
| -rw-r--r-- | drivers/leds/trigger/ledtrig-cpu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/leds/trigger/ledtrig-cpu.c b/drivers/leds/trigger/ledtrig-cpu.c index 8af4f9bb9cde..05848a2fecff 100644 --- a/drivers/leds/trigger/ledtrig-cpu.c +++ b/drivers/leds/trigger/ledtrig-cpu.c @@ -130,7 +130,7 @@ static int ledtrig_prepare_down_cpu(unsigned int cpu) static int __init ledtrig_cpu_init(void) { - int cpu; + unsigned int cpu; int ret; /* Supports up to 9999 cpu cores */ @@ -152,7 +152,7 @@ static int __init ledtrig_cpu_init(void) if (cpu >= 8) continue; - snprintf(trig->name, MAX_NAME_LEN, "cpu%d", cpu); + snprintf(trig->name, MAX_NAME_LEN, "cpu%u", cpu); led_trigger_register_simple(trig->name, &trig->_trig); } |