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* [PATCH] x86/um/vdso: Drop implicit common-page-size linker flag
@ 2018-12-10 22:27 ndesaulniers
  2018-12-11 12:46 ` Richard Weinberger
  0 siblings, 1 reply; 2+ messages in thread
From: ndesaulniers @ 2018-12-10 22:27 UTC (permalink / raw)
  To: jdike, richard
  Cc: Nick Desaulniers, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
	H. Peter Anvin, x86, Masahiro Yamada, linux-um, linux-kernel

GNU linker's -z common-page-size's default value is based on the target
architecture. arch/x86/entry/vdso/Makefile sets it to the architecture
default, which is implicit and redundant. Drop it.

Link: https://lkml.kernel.org/r/20181206191231.192355-1-ndesaulniers@google.com
Signed-off-by: Nick Desaulniers <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
 
-- 
2.20.0.rc2.403.gdbc3b29805-goog


^ permalink raw reply related	[flat|nested] 2+ messages in thread

* Re: [PATCH] x86/um/vdso: Drop implicit common-page-size linker flag
  2018-12-10 22:27 [PATCH] x86/um/vdso: Drop implicit common-page-size linker flag ndesaulniers
@ 2018-12-11 12:46 ` Richard Weinberger
  0 siblings, 0 replies; 2+ messages in thread
From: Richard Weinberger @ 2018-12-11 12:46 UTC (permalink / raw)
  To: ndesaulniers
  Cc: jdike, Thomas Gleixner, Ingo Molnar, Borislav Petkov,
	H. Peter Anvin, x86, Masahiro Yamada, linux-um, linux-kernel

Am Montag, 10. Dezember 2018, 23:27:16 CET schrieb ndesaulniers@google.com:
> GNU linker's -z common-page-size's default value is based on the target
> architecture. arch/x86/entry/vdso/Makefile sets it to the architecture
> default, which is implicit and redundant. Drop it.
> 
> Link: https://lkml.kernel.org/r/20181206191231.192355-1-ndesaulniers@google.com
> Signed-off-by: Nick Desaulniers <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

Acked-by: Richard Weinberger <richard@nod.at>

Thanks,
//richard



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