1 #ifndef __LINUX_CACHE_H 2 #define __LINUX_CACHE_H 3 4 #include <linux/kernel.h> 5 #include <asm/cache.h> 6 7 #ifndef L1_CACHE_ALIGN 8 #define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES) 9 #endif 10 11 #ifndef SMP_CACHE_BYTES 12 #define SMP_CACHE_BYTES L1_CACHE_BYTES 13 #endif 14 15 #ifndef __read_mostly 16 #define __read_mostly 17 #endif 18 19 #ifndef ____cacheline_aligned 20 #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES))) 21 #endif 22 23 #ifndef ____cacheline_aligned_in_smp 24 #ifdef CONFIG_SMP 25 #define ____cacheline_aligned_in_smp ____cacheline_aligned 26 #else 27 #define ____cacheline_aligned_in_smp 28 #endif /* CONFIG_SMP */ 29 #endif 30 31 #ifndef __cacheline_aligned 32 #define __cacheline_aligned \ 33 __attribute__((__aligned__(SMP_CACHE_BYTES), \ 34 __section__(".data.cacheline_aligned"))) 35 #endif /* __cacheline_aligned */ 36 37 #ifndef __cacheline_aligned_in_smp 38 #ifdef CONFIG_SMP 39 #define __cacheline_aligned_in_smp __cacheline_aligned 40 #else 41 #define __cacheline_aligned_in_smp 42 #endif /* CONFIG_SMP */ 43 #endif 44 45 /* 46 * The maximum alignment needed for some critical structures 47 * These could be inter-node cacheline sizes/L3 cacheline 48 * size etc. Define this in asm/cache.h for your arch 49 */ 50 #ifndef INTERNODE_CACHE_SHIFT 51 #define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT 52 #endif 53 54 #if !defined(____cacheline_internodealigned_in_smp) 55 #if defined(CONFIG_SMP) 56 #define ____cacheline_internodealigned_in_smp \ 57 __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT)))) 58 #else 59 #define ____cacheline_internodealigned_in_smp 60 #endif 61 #endif 62 63 #endif /* __LINUX_CACHE_H */ 64
