Commit 05a6b8c1 authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Thomas Gleixner
Browse files

x86/vdso: Delete vvar.h 



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Signed-off-by: default avatarThomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20241010-vdso-generic-base-v1-19-b64f0842d512@linutronix.de
parent 7d4acbae

arch/x86/include/asm/vvar.h

deleted100644 → 0
+0 −66
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * vvar.h: Shared vDSO/kernel variable declarations

 * Copyright (c) 2011 Andy Lutomirski

 *

 * 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



#ifdef EMIT_VVAR

/*

 * EMIT_VVAR() is used by the kernel linker script to put vvars in the

 * right place. Also, it's used by kernel code to import offsets values.

 */

#define DECLARE_VVAR(offset, type, name) \

	EMIT_VVAR(name, offset)

#define DECLARE_VVAR_SINGLE(offset, type, name) \

	EMIT_VVAR(name, offset)



#else



extern char __vvar_page;



#define DECLARE_VVAR(offset, type, name)				\

	extern type vvar_ ## name[CS_BASES]				\

	__attribute__((visibility("hidden")));				\

	extern type timens_ ## name[CS_BASES]				\

	__attribute__((visibility("hidden")));				\



#define DECLARE_VVAR_SINGLE(offset, type, name)				\

	extern type vvar_ ## name					\

	__attribute__((visibility("hidden")));				\



#define VVAR(name) (vvar_ ## name)

#define TIMENS(name) (timens_ ## name)



#define DEFINE_VVAR(type, name)						\

	type name[CS_BASES]						\

	__attribute__((section(".vvar_" #name), aligned(16))) __visible



#define DEFINE_VVAR_SINGLE(type, name)					\

	type name							\

	__attribute__((section(".vvar_" #name), aligned(16))) __visible



#endif



/* DECLARE_VVAR(offset, type, name) */



DECLARE_VVAR(0, struct vdso_data, _vdso_data)



#undef DECLARE_VVAR

#undef DECLARE_VVAR_SINGLE



#endif