diff options
| author |   Stefani Seibold <stefani@seibold.net> | 2014-03-17 23:22:01 +0100 |
|---|---|---|
| committer |   H. Peter Anvin <hpa@linux.intel.com> | 2014-03-18 12:51:52 -0700 |
| commit | d2312e3379d581d2c3603357a0181046448e1de3 (patch) | |
| tree | ab547fa84f977650479eb13dc038bca85acba402 /arch/x86/include/asm/vvar.h | |
| parent | x86, vdso, xen: Remove stray reference to FIX_VDSO (diff) | |
| download | linux-dev-d2312e3379d581d2c3603357a0181046448e1de3.tar.xz linux-dev-d2312e3379d581d2c3603357a0181046448e1de3.zip | |
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 <luto@amacapital.net>
Signed-off-by: Stefani Seibold <stefani@seibold.net>
Link: http://lkml.kernel.org/r/1395094933-14252-2-git-send-email-stefani@seibold.net
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/include/asm/vvar.h')
| -rw-r--r-- | arch/x86/include/asm/vvar.h | 12 |
1 files changed, 9 insertions, 3 deletions
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)); |