This is a note to let you know that I've just added the patch titled
sparc64: NMI watchdog: fix return value of __setup handler
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
sparc64-nmi-watchdog-fix-return-value-of-__setup-han.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6613e411ca811ece6336f148cbf3901cabac1b5a
Author: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Date: Sat Feb 10 21:28:02 2024 -0800
sparc64: NMI watchdog: fix return value of __setup handler
[ Upstream commit 3ed7c61e49d65dacb96db798c0ab6fcd55a1f20f ]
__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled.
A return of 0 causes the boot option/value to be listed as an Unknown
kernel parameter and added to init's (limited) argument or environment
strings. Also, error return codes don't mean anything to
obsolete_checksetup() -- only non-zero (usually 1) or zero.
So return 1 from setup_nmi_watchdog().
Fixes: e5553a6d0442 ("sparc64: Implement NMI watchdog on capable cpus.")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: Igor Zhbanov <izh1979@xxxxxxxxx>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@xxxxxxxxxxxx
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Signed-off-by: Andreas Larsson <andreas@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240211052802.22612-1-rdunlap@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index 8babbeb30adf9..1f356928a06d5 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -273,7 +273,7 @@ static int __init setup_nmi_watchdog(char *str)
if (!strncmp(str, "panic", 5))
panic_on_timeout = 1;
- return 0;
+ return 1;
}
__setup("nmi_watchdog=", setup_nmi_watchdog);
