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Filename/usr/src/linux-headers-3.13.0-24/include/linux/cache.h
Size1.58 kb
Permissionrw-r--r--
Ownerroot : root
Create time27-Apr-2025 09:50
Last modified20-Jan-2014 10:40
Last accessed06-Jul-2025 05:30
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#ifndef __LINUX_CACHE_H
#define __LINUX_CACHE_H

#include <linux/kernel.h>
#include <asm/cache.h>

#ifndef L1_CACHE_ALIGN
#define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES)
#endif

#ifndef SMP_CACHE_BYTES
#define SMP_CACHE_BYTES L1_CACHE_BYTES
#endif

#ifndef __read_mostly
#define __read_mostly
#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
#else
#define ____cacheline_aligned_in_smp
#endif /* CONFIG_SMP */
#endif

#ifndef __cacheline_aligned
#define __cacheline_aligned \
__attribute__((__aligned__(SMP_CACHE_BYTES), \
__section__(".data..cacheline_aligned")))
#endif /* __cacheline_aligned */

#ifndef __cacheline_aligned_in_smp
#ifdef CONFIG_SMP
#define __cacheline_aligned_in_smp __cacheline_aligned
#else
#define __cacheline_aligned_in_smp
#endif /* CONFIG_SMP */
#endif

/*
* The maximum alignment needed for some critical structures
* These could be inter-node cacheline sizes/L3 cacheline
* size etc. Define this in asm/cache.h for your arch
*/
#ifndef INTERNODE_CACHE_SHIFT
#define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT
#endif

#if !defined(____cacheline_internodealigned_in_smp)
#if defined(CONFIG_SMP)
#define ____cacheline_internodealigned_in_smp \
__attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT))))
#else
#define ____cacheline_internodealigned_in_smp
#endif
#endif

#ifndef CONFIG_ARCH_HAS_CACHE_LINE_SIZE
#define cache_line_size() L1_CACHE_BYTES
#endif

#endif /* __LINUX_CACHE_H */