linux-kernel - [PATCH 2/2] Revert "um: clang: Strip out -mno-global-merge from USER

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Message-Id: <20220330234528.1426991-3-nathan@kernel.org>
Date:   Wed, 30 Mar 2022 16:45:28 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        Kees Cook <keescook@...omium.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-um@...ts.infradead.org, llvm@...ts.linux.dev,
        patches@...ts.linux.dev, Nathan Chancellor <nathan@...nel.org>
Subject: [PATCH 2/2] Revert "um: clang: Strip out -mno-global-merge from USER_CFLAGS"

This reverts commit 6580c5c18fb3df2b11c5e0452372f815deeff895.

This patch is buggy, as noted in the patch linked below. The root cause
has been solved by removing '-mno-global-merge' for the entire kernel.

Link: https://lore.kernel.org/r/20220322173547.677760-1-nathan@kernel.org/
Signed-off-by: Nathan Chancellor <nathan@...nel.org>
---
 arch/um/Makefile | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/um/Makefile b/arch/um/Makefile
index 320b09cd513c..f2fe63bfd819 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -75,10 +75,6 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
 		-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
 		-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
 
-ifdef CONFIG_CC_IS_CLANG
-USER_CFLAGS := $(patsubst -mno-global-merge,,$(USER_CFLAGS))
-endif
-
 #This will adjust *FLAGS accordingly to the platform.
 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 
-- 
2.35.1