projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | #ifndef __LINUX_CACHE_H |
| 2 | #define __LINUX_CACHE_H | |
| 3 | ||
| 4 | #include <linux/kernel.h> | |
| 1da177e4 LT |
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 | ||
| 804f1594 | 15 | #ifndef __read_mostly |
| 6c036527 CL |
16 | #define __read_mostly |
| 17 | #endif | |
| 18 | ||
| 1da177e4 LT |
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), \ | |
| 4af57b78 | 34 | __section__(".data..cacheline_aligned"))) |
| 1da177e4 LT |
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 | ||
| 22fc6ecc RT |
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) | |
| 1da177e4 | 55 | #if defined(CONFIG_SMP) |
| 22fc6ecc RT |
56 | #define ____cacheline_internodealigned_in_smp \ |
| 57 | __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT)))) | |
| 1da177e4 | 58 | #else |
| 22fc6ecc | 59 | #define ____cacheline_internodealigned_in_smp |
| 1da177e4 LT |
60 | #endif |
| 61 | #endif | |
| 62 | ||
| 1b27d05b PE |
63 | #ifndef CONFIG_ARCH_HAS_CACHE_LINE_SIZE |
| 64 | #define cache_line_size() L1_CACHE_BYTES | |
| 65 | #endif | |
| 66 | ||
| 1da177e4 | 67 | #endif /* __LINUX_CACHE_H */ |