Patch "ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions" has been added to the 5.15-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions

to the 5.15-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:
     arm-9182-1-mmu-fix-returns-from-early_param-and-__setup-functions.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From 7b83299e5b9385943a857d59e15cba270df20d7e Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap at infradead.org>
Date: Wed, 23 Feb 2022 20:46:35 +0100
Subject: ARM: 9182/1: mmu: fix returns from early_param() and __setup() functions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Randy Dunlap <rdunlap at infradead.org>

commit 7b83299e5b9385943a857d59e15cba270df20d7e upstream.

early_param() handlers should return 0 on success.
__setup() handlers should return 1 on success, i.e., the parameter
has been handled. A return of 0 would cause the "option=value" string
to be added to init's environment strings, polluting it.

../arch/arm/mm/mmu.c: In function 'test_early_cachepolicy':
../arch/arm/mm/mmu.c:215:1: error: no return statement in function returning non-void [-Werror=return-type]
../arch/arm/mm/mmu.c: In function 'test_noalign_setup':
../arch/arm/mm/mmu.c:221:1: error: no return statement in function returning non-void [-Werror=return-type]

Fixes: b849a60e0903 ("ARM: make cr_alignment read-only #ifndef CONFIG_CPU_CP15")
Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
Reported-by: Igor Zhbanov <i.zhbanov at omprussia.ru>
Cc: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
Cc: linux-arm-kernel at lists.infradead.org
Cc: patches at armlinux.org.uk
Signed-off-by: Russell King (Oracle) <rmk+kernel at armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 arch/arm/mm/mmu.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/arm/mm/mmu.c
+++ b/arch/arm/mm/mmu.c
@@ -212,12 +212,14 @@ early_param("ecc", early_ecc);
 static int __init early_cachepolicy(char *p)
 {
 	pr_warn("cachepolicy kernel parameter not supported without cp15\n");
+	return 0;
 }
 early_param("cachepolicy", early_cachepolicy);
 
 static int __init noalign_setup(char *__unused)
 {
 	pr_warn("noalign kernel parameter not supported without cp15\n");
+	return 1;
 }
 __setup("noalign", noalign_setup);
 


Patches currently in stable-queue which might be from rdunlap at infradead.org are

queue-5.15/arm-9182-1-mmu-fix-returns-from-early_param-and-__setup-functions.patch
queue-5.15/iwlwifi-mvm-check-debugfs_dir-ptr-before-use.patch
queue-5.15/net-stmmac-fix-return-value-of-__setup-handler.patch
queue-5.15/pci-rcar-check-if-device-is-runtime-suspended-instea.patch
queue-5.15/mips-setup-fix-setnocoherentio-boolean-setting.patch
queue-5.15/net-sxgbe-fix-return-value-of-__setup-handler.patch