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1da177e4 LT |
1 | #ifndef __LINUX_CACHE_H |
2 | #define __LINUX_CACHE_H | |
3 | ||
4 | #include <linux/kernel.h> | |
5 | #include <linux/config.h> | |
6 | #include <asm/cache.h> | |
7 | ||
8 | #ifndef L1_CACHE_ALIGN | |
9 | #define L1_CACHE_ALIGN(x) ALIGN(x, L1_CACHE_BYTES) | |
10 | #endif | |
11 | ||
12 | #ifndef SMP_CACHE_BYTES | |
13 | #define SMP_CACHE_BYTES L1_CACHE_BYTES | |
14 | #endif | |
15 | ||
dc86e88c | 16 | #if defined(CONFIG_X86) || defined(CONFIG_SPARC64) || defined(CONFIG_IA64) |
6c036527 CL |
17 | #define __read_mostly __attribute__((__section__(".data.read_mostly"))) |
18 | #else | |
19 | #define __read_mostly | |
20 | #endif | |
21 | ||
1da177e4 LT |
22 | #ifndef ____cacheline_aligned |
23 | #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES))) | |
24 | #endif | |
25 | ||
26 | #ifndef ____cacheline_aligned_in_smp | |
27 | #ifdef CONFIG_SMP | |
28 | #define ____cacheline_aligned_in_smp ____cacheline_aligned | |
29 | #else | |
30 | #define ____cacheline_aligned_in_smp | |
31 | #endif /* CONFIG_SMP */ | |
32 | #endif | |
33 | ||
34 | #ifndef __cacheline_aligned | |
35 | #define __cacheline_aligned \ | |
36 | __attribute__((__aligned__(SMP_CACHE_BYTES), \ | |
37 | __section__(".data.cacheline_aligned"))) | |
38 | #endif /* __cacheline_aligned */ | |
39 | ||
40 | #ifndef __cacheline_aligned_in_smp | |
41 | #ifdef CONFIG_SMP | |
42 | #define __cacheline_aligned_in_smp __cacheline_aligned | |
43 | #else | |
44 | #define __cacheline_aligned_in_smp | |
45 | #endif /* CONFIG_SMP */ | |
46 | #endif | |
47 | ||
22fc6ecc RT |
48 | /* |
49 | * The maximum alignment needed for some critical structures | |
50 | * These could be inter-node cacheline sizes/L3 cacheline | |
51 | * size etc. Define this in asm/cache.h for your arch | |
52 | */ | |
53 | #ifndef INTERNODE_CACHE_SHIFT | |
54 | #define INTERNODE_CACHE_SHIFT L1_CACHE_SHIFT | |
55 | #endif | |
56 | ||
57 | #if !defined(____cacheline_internodealigned_in_smp) | |
1da177e4 | 58 | #if defined(CONFIG_SMP) |
22fc6ecc RT |
59 | #define ____cacheline_internodealigned_in_smp \ |
60 | __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT)))) | |
1da177e4 | 61 | #else |
22fc6ecc | 62 | #define ____cacheline_internodealigned_in_smp |
1da177e4 LT |
63 | #endif |
64 | #endif | |
65 | ||
66 | #endif /* __LINUX_CACHE_H */ |