linux-kernel - [tip:x86/build] x86/um/vdso: Drop implicit common-page-size linker flag

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Date:   Tue, 11 Dec 2018 05:12:53 -0800
From:   "tip-bot for ndesaulniers@...gle.com" <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org,
        ndesaulniers@...gle.com, jdike@...toit.com, hpa@...or.com,
        bp@...e.de, mingo@...nel.org, tglx@...utronix.de, richard@....at,
        mingo@...hat.com, yamada.masahiro@...ionext.com
Subject: [tip:x86/build] x86/um/vdso: Drop implicit common-page-size linker
 flag

Commit-ID:  f4313ba52f9caccfda6a55f991c84aba6726b88f
Gitweb:     https://git.kernel.org/tip/f4313ba52f9caccfda6a55f991c84aba6726b88f
Author:     ndesaulniers@...gle.com <ndesaulniers@...gle.com>
AuthorDate: Mon, 10 Dec 2018 14:27:16 -0800
Committer:  Borislav Petkov <bp@...e.de>
CommitDate: Tue, 11 Dec 2018 13:58:57 +0100

x86/um/vdso: Drop implicit common-page-size linker flag

GNU linker's -z common-page-size's default value is based on the target
architecture. arch/x86/um/vdso/Makefile sets it to the architecture
default, which is implicit and redundant. Drop it so that one more LLVM
build issue gets addressed.

Signed-off-by: Nick Desaulniers <ndesaulniers@...gle.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Acked-by: Richard Weinberger <richard@....at>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jeff Dike <jdike@...toit.com>
Cc: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: linux-um@...ts.infradead.org
Cc: x86-ml <x86@...nel.org>
Link: https://lkml.kernel.org/r/20181206191231.192355-1-ndesaulniers@google.com
---
 arch/x86/um/vdso/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/um/vdso/Makefile b/arch/x86/um/vdso/Makefile
index 822ccdba93ad..bf94060fc06f 100644
--- a/arch/x86/um/vdso/Makefile
+++ b/arch/x86/um/vdso/Makefile
@@ -26,7 +26,7 @@ targets += vdso.so vdso.so.dbg vdso.lds $(vobjs-y)
 CPPFLAGS_vdso.lds += -P -C
 
 VDSO_LDFLAGS_vdso.lds = -m64 -Wl,-soname=linux-vdso.so.1 \
-       -Wl,-z,max-page-size=4096 -Wl,-z,common-page-size=4096
+       -Wl,-z,max-page-size=4096
 
 $(obj)/vdso.o: $(src)/vdso.S $(obj)/vdso.so