From 68c5cf5a6091c2c3fabccfd42ca844d730ec24c6 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Sun, 31 Jul 2016 14:11:11 +0200 Subject: [PATCH] s390: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO AT_VECTOR_SIZE_ARCH should be defined with the maximum number of NEW_AUX_ENT entries that ARCH_DLINFO can contain, but it wasn't defined for s390 at all even though ARCH_DLINFO can contain one NEW_AUX_ENT when VDSO is enabled. This shouldn't be a problem as AT_VECTOR_SIZE_BASE includes space for AT_BASE_PLATFORM which s390 doesn't use, but lets define it now and add the comment above ARCH_DLINFO as found in several other architectures to remind future modifiers of ARCH_DLINFO to keep AT_VECTOR_SIZE_ARCH up to date. Fixes: b020632e40c3 ("[S390] introduce vdso on s390") Signed-off-by: James Hogan Signed-off-by: Martin Schwidefsky Cc: Heiko Carstens Cc: linux-s390@vger.kernel.org --- arch/s390/include/asm/elf.h | 1 + arch/s390/include/uapi/asm/auxvec.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h index 563ab9f44874..1736c7d3c94c 100644 --- a/arch/s390/include/asm/elf.h +++ b/arch/s390/include/asm/elf.h @@ -225,6 +225,7 @@ do { \ #define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL) #define STACK_RND_MASK MMAP_RND_MASK +/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ #define ARCH_DLINFO \ do { \ if (vdso_enabled) \ diff --git a/arch/s390/include/uapi/asm/auxvec.h b/arch/s390/include/uapi/asm/auxvec.h index a1f153e89133..c53e08442255 100644 --- a/arch/s390/include/uapi/asm/auxvec.h +++ b/arch/s390/include/uapi/asm/auxvec.h @@ -3,4 +3,6 @@ #define AT_SYSINFO_EHDR 33 +#define AT_VECTOR_SIZE_ARCH 1 /* entries in ARCH_DLINFO */ + #endif -- 2.20.1