linux-kernel - [PATCH v5 1/5] uapi: Move the aux vector AT

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Date:   Wed,  3 Feb 2021 09:22:38 -0800
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     bp@...e.de, tglx@...utronix.de, mingo@...nel.org, luto@...nel.org,
        x86@...nel.org
Cc:     len.brown@...el.com, dave.hansen@...el.com, hjl.tools@...il.com,
        Dave.Martin@....com, jannh@...gle.com, mpe@...erman.id.au,
        carlos@...hat.com, tony.luck@...el.com, ravi.v.shankar@...el.com,
        libc-alpha@...rceware.org, linux-arch@...r.kernel.org,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        chang.seok.bae@...el.com, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v5 1/5] uapi: Move the aux vector AT_MINSIGSTKSZ define to uapi

Move the AT_MINSIGSTKSZ definition to generic Linux from arm64. It is
already used as generic ABI in glibc's generic elf.h, and this move will
prevent future namespace conflicts. In particular, x86 will re-use this
generic definition.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Reviewed-by: Len Brown <len.brown@...el.com>
Cc: Carlos O'Donell <carlos@...hat.com>
Cc: Dave Martin <Dave.Martin@....com>
Cc: libc-alpha@...rceware.org
Cc: linux-arch@...r.kernel.org
Cc: linux-api@...r.kernel.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
---
Change from v4:
* Added as a new patch (Carlos O'Donell)
---
 arch/arm64/include/uapi/asm/auxvec.h | 1 -
 include/uapi/linux/auxvec.h          | 1 +
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/include/uapi/asm/auxvec.h b/arch/arm64/include/uapi/asm/auxvec.h
index 743c0b84fd30..767d710c92aa 100644
--- a/arch/arm64/include/uapi/asm/auxvec.h
+++ b/arch/arm64/include/uapi/asm/auxvec.h
@@ -19,7 +19,6 @@
 
 /* vDSO location */
 #define AT_SYSINFO_EHDR	33
-#define AT_MINSIGSTKSZ	51	/* stack needed for signal delivery */
 
 #define AT_VECTOR_SIZE_ARCH 2 /* entries in ARCH_DLINFO */
 
diff --git a/include/uapi/linux/auxvec.h b/include/uapi/linux/auxvec.h
index abe5f2b6581b..cc4fa77bd2a7 100644
--- a/include/uapi/linux/auxvec.h
+++ b/include/uapi/linux/auxvec.h
@@ -33,5 +33,6 @@
 
 #define AT_EXECFN  31	/* filename of program */
 
+#define AT_MINSIGSTKSZ	51	/* stack needed for signal delivery  */
 
 #endif /* _UAPI_LINUX_AUXVEC_H */
-- 
2.17.1