From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/x86/include/asm/vvar.h | 51 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 kernel/arch/x86/include/asm/vvar.h (limited to 'kernel/arch/x86/include/asm/vvar.h') diff --git a/kernel/arch/x86/include/asm/vvar.h b/kernel/arch/x86/include/asm/vvar.h new file mode 100644 index 000000000..3f32dfc2a --- /dev/null +++ b/kernel/arch/x86/include/asm/vvar.h @@ -0,0 +1,51 @@ +/* + * 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.) + */ + +#ifndef _ASM_X86_VVAR_H +#define _ASM_X86_VVAR_H + +#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 + +extern char __vvar_page; + +#define DECLARE_VVAR(offset, type, name) \ + extern type vvar_ ## name __attribute__((visibility("hidden"))); + +#define VVAR(name) (vvar_ ## name) + +#define DEFINE_VVAR(type, name) \ + type name \ + __attribute__((section(".vvar_" #name), aligned(16))) __visible + +#endif + +/* DECLARE_VVAR(offset, type, name) */ + +DECLARE_VVAR(128, struct vsyscall_gtod_data, vsyscall_gtod_data) + +#undef DECLARE_VVAR + +#endif -- cgit 1.2.3-korg