diff options
Diffstat (limited to 'arch/x86/include/asm/vvar.h')
| -rw-r--r-- | arch/x86/include/asm/vvar.h | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/arch/x86/include/asm/vvar.h b/arch/x86/include/asm/vvar.h deleted file mode 100644 index de656ac2af41..000000000000 --- a/arch/x86/include/asm/vvar.h +++ /dev/null @@ -1,50 +0,0 @@ -/* - * vvar.h: Shared vDSO/kernel variable declarations - * Copyright (c) 2011 Andy Lutomirski - * Subject to the GNU General Public License, version 2 - * - * A handful of variables are accessible (read-only) from userspace - * code in the vsyscall page and the vdso. They are declared here. - * Some other file must define them with DEFINE_VVAR. - * - * In normal kernel code, they are used like any other variable. - * In user code, they are accessed through the VVAR macro. - * - * These variables live in a page of kernel data that has an extra RO - * mapping for userspace. Each variable needs a unique offset within - * that page; specify that offset with the DECLARE_VVAR macro. (If - * 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 - * right place. - */ -#define DECLARE_VVAR(offset, type, name) \ - EMIT_VVAR(name, offset) - -#else - -#define DECLARE_VVAR(offset, type, name) \ - static type const * const vvaraddr_ ## name = \ - (void *)(VVAR_ADDRESS + (offset)); - -#define DEFINE_VVAR(type, name) \ - type name \ - __attribute__((section(".vvar_" #name), aligned(16))) - -#define VVAR(name) (*vvaraddr_ ## name) - -#endif - -/* DECLARE_VVAR(offset, type, name) */ - -DECLARE_VVAR(0, volatile unsigned long, jiffies) -DECLARE_VVAR(16, int, vgetcpu_mode) -DECLARE_VVAR(128, struct vsyscall_gtod_data, vsyscall_gtod_data) - -#undef DECLARE_VVAR |
