linux-kernel - [PATCH] arm: Silence gcc warnings about arch ABI drift

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Date: Sun, 18 Feb 2024 20:09:06 -0800
From: Calvin Owens <jcalvinowens@...il.com>
To: Russell King <linux@...linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>
Cc: Dave Martin <Dave.Martin@....com>,
	jcalvinowens@...il.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] arm: Silence gcc warnings about arch ABI drift

32-bit arm builds uniquely emit a lot of spam like this:

    fs/bcachefs/backpointers.c: In function ‘extent_matches_bp’:
    fs/bcachefs/backpointers.c:15:13: note: parameter passing for argument of type ‘struct bch_backpointer’ changed in GCC 9.1

Apply the arm64 change from commit ebcc5928c5d9 ("arm64: Silence gcc
warnings about arch ABI drift") to silence them. It seems like Dave's
original rationale applies here too.

Cc: Dave Martin <Dave.Martin@....com>
Signed-off-by: Calvin Owens <jcalvinowens@...il.com>
---
 arch/arm/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 473280d5adce..184a5a2c7756 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -28,6 +28,9 @@ KBUILD_CFLAGS	+= $(call cc-option,-mno-fdpic)
 # This should work on most of the modern platforms
 KBUILD_DEFCONFIG := multi_v7_defconfig
 
+# Silence "note: xyz changed in GCC X.X" messages
+KBUILD_CFLAGS	+= $(call cc-disable-warning, psabi)
+
 # defines filename extension depending memory management type.
 ifeq ($(CONFIG_MMU),)
 MMUEXT		:= -nommu
-- 
2.43.0