From d2312e3379d581d2c3603357a0181046448e1de3 Mon Sep 17 00:00:00 2001 From: Stefani Seibold Date: Mon, 17 Mar 2014 23:22:01 +0100 Subject: x86, vdso: Make vsyscall_gtod_data handling x86 generic This patch move the vsyscall_gtod_data handling out of vsyscall_64.c into an additonal file vsyscall_gtod.c to make the functionality available for x86 32 bit kernel. It also adds a new vsyscall_32.c which setup the VVAR page. Reviewed-by: Andy Lutomirski Signed-off-by: Stefani Seibold Link: http://lkml.kernel.org/r/1395094933-14252-2-git-send-email-stefani@seibold.net Signed-off-by: H. Peter Anvin --- arch/x86/include/asm/vvar.h | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'arch/x86/include/asm/vvar.h') diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h index d76ac40da206..0a534eac5f56 100644 --- a/arch/x86/include/asm/vvar.h +++ b/arch/x86/include/asm/vvar.h @@ -16,9 +16,6 @@ * you mess up, the linker will catch it.) */ -/* Base address of vvars. This is not ABI. */ -#define VVAR_ADDRESS (-10*1024*1024 - 4096) - #if defined(__VVAR_KERNEL_LDS) /* The kernel linker script defines its own magic to put vvars in the @@ -29,6 +26,15 @@ #else +extern char __vvar_page; + +/* Base address of vvars. This is not ABI. */ +#ifdef CONFIG_X86_64 +#define VVAR_ADDRESS (-10*1024*1024 - 4096) +#else +#define VVAR_ADDRESS (&__vvar_page) +#endif + #define DECLARE_VVAR(offset, type, name) \ static type const * const vvaraddr_ ## name = \ (void *)(VVAR_ADDRESS + (offset)); -- cgit v1.2.3