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init: replace simple_strtoul with kstrtoul to improve lpj_setup

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Replace simple_strtoul() with the recommended kstrtoul() for parsing the
'lpj=' boot parameter.

Check the return value of kstrtoul() and reject invalid values.  This adds
error handling while preserving existing behavior for valid values, and
removes use of the deprecated simple_strtoul() helper.

Link: https://lkml.kernel.org/r/20251122114539.446937-2-thorsten.blum@linux.dev
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thorsten Blum
2025-11-22 12:45:37 +01:00
committed by Andrew Morton
parent 40cd0e8dd2
commit af06a40474
1 changed files with 2 additions and 2 deletions
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4
init/calibrate.c
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@@ -14,10 +14,10 @@
unsigned long lpj_fine;
unsigned long preset_lpj;
static int __init lpj_setup(char *str)
{
preset_lpj = simple_strtoul(str,NULL,0);
return 1;
return kstrtoul(str, 0, &preset_lpj) == 0;
}
__setup("lpj=", lpj_setup);