Commit 602ba773 authored by Song Liu's avatar Song Liu Committed by Andrew Morton
Browse files

watchdog: handle comma separated nmi_watchdog command line 

Per the document, the kernel can accept comma separated command line like
nmi_watchdog=nopanic,0.  However, the code doesn't really handle it.  Fix
the kernel to handle it properly.

Link: https://lkml.kernel.org/r/20240430060236.1878002-1-song@kernel.org


Signed-off-by: default avatarSong Liu <song@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
parent 91d743a9

kernel/watchdog.c

+7 −0
Original line number Diff line number Diff line
@@ -71,6 +71,7 @@ void __init hardlockup_detector_disable(void) 


static int __init hardlockup_panic_setup(char *str)

{

next:

	if (!strncmp(str, "panic", 5))

		hardlockup_panic = 1;

	else if (!strncmp(str, "nopanic", 7))
@@ -79,6 +80,12 @@ static int __init hardlockup_panic_setup(char *str) 
		watchdog_hardlockup_user_enabled = 0;

	else if (!strncmp(str, "1", 1))

		watchdog_hardlockup_user_enabled = 1;

	while (*(str++)) {

		if (*str == ',') {

			str++;

			goto next;

		}

	}

	return 1;

}

__setup("nmi_watchdog=", hardlockup_panic_setup);