| From | Ben Hutchings <> | Date | Mon, 14 Nov 2016 00:14:20 +0000 | Subject | [PATCH 3.16 135/346] s390: Define AT_VECTOR_SIZE_ARCH for ARCH_DLINFO |
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3.16.39-rc1 review patch. If anyone has any objections, please let me know.
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From: James Hogan <james.hogan@imgtec.com>
commit 68c5cf5a6091c2c3fabccfd42ca844d730ec24c6 upstream.
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 <james.hogan@imgtec.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: linux-s390@vger.kernel.org Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- arch/s390/include/asm/elf.h | 1 + arch/s390/include/uapi/asm/auxvec.h | 2 ++ 2 files changed, 3 insertions(+)
--- a/arch/s390/include/asm/elf.h +++ b/arch/s390/include/asm/elf.h @@ -210,6 +210,7 @@ do { \ #define STACK_RND_MASK 0x7ffUL +/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ #define ARCH_DLINFO \ do { \ if (vdso_enabled) \ --- 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
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