Commit 0704bf43 authored by Thomas Weißschuh's avatar Thomas Weißschuh Committed by Thomas Gleixner
Browse files

vdso: Introduce vdso/cache.h 



The vDSO implementation can only include headers from the vdso/
namespace. To enable the usage of ____cacheline_aligned from
the vDSO, move it and its dependencies into a new header vdso/cache.h.
Keep compatibility by including vdso/cache.h from linux/cache.h.

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/20250303-vdso-clock-v1-1-c1b5c69a166f@linutronix.de
parent 8770a918

include/linux/cache.h

+1 −8
Original line number Diff line number Diff line
@@ -3,16 +3,13 @@ 
#define __LINUX_CACHE_H



#include <uapi/linux/kernel.h>

#include <vdso/cache.h>

#include <asm/cache.h>



#ifndef L1_CACHE_ALIGN

#define L1_CACHE_ALIGN(x) __ALIGN_KERNEL(x, L1_CACHE_BYTES)

#endif



#ifndef SMP_CACHE_BYTES

#define SMP_CACHE_BYTES L1_CACHE_BYTES

#endif



/**

 * SMP_CACHE_ALIGN - align a value to the L2 cacheline size

 * @x: value to align
@@ -63,10 +60,6 @@ 
#define __ro_after_init __section(".data..ro_after_init")

#endif



#ifndef ____cacheline_aligned

#define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))

#endif



#ifndef ____cacheline_aligned_in_smp

#ifdef CONFIG_SMP

#define ____cacheline_aligned_in_smp ____cacheline_aligned

include/vdso/cache.h

0 → 100644
+15 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#ifndef __VDSO_CACHE_H

#define __VDSO_CACHE_H



#include <asm/cache.h>



#ifndef SMP_CACHE_BYTES

#define SMP_CACHE_BYTES L1_CACHE_BYTES

#endif



#ifndef ____cacheline_aligned

#define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))

#endif



#endif	/* __VDSO_ALIGN_H */