x86: vdso ELF handling - use SELFMAG instead of numeric constant

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: akpm@linux-foundation.org
Cc: hpa@zytor.com
Cc: mingo@elte.hu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/arch/x86/vdso/vdso32-setup.c b/arch/x86/vdso/vdso32-setup.c
index 4dceeb1fc5e0f229305c983d39c8cf6497b5a409..cf058fecfceec989354ec17a3d681cae65315935 100644 (file)
--- a/arch/x86/vdso/vdso32-setup.c
+++ b/arch/x86/vdso/vdso32-setup.c
@@ -162,7 +162,7 @@ static __init void relocate_vdso(Elf32_Ehdr *ehdr)
        Elf32_Shdr *shdr;
        int i;
 
-       BUG_ON(memcmp(ehdr->e_ident, ELFMAG, 4) != 0 ||
+       BUG_ON(memcmp(ehdr->e_ident, ELFMAG, SELFMAG) != 0 ||
               !elf_check_arch_ia32(ehdr) ||
               ehdr->e_type != ET_DYN);