[PATCH] Change maxaligned_in_smp alignemnt macros to internodealigned_in_smp macros
[linux-3.10.git] / include / linux / cache.h
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
16 #if defined(CONFIG_X86) || defined(CONFIG_SPARC64) || defined(CONFIG_IA64)
17 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
18 #else
19 #define __read_mostly
20 #endif
21
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
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)
58 #if defined(CONFIG_SMP)
59 #define ____cacheline_internodealigned_in_smp \
60         __attribute__((__aligned__(1 << (INTERNODE_CACHE_SHIFT))))
61 #else
62 #define ____cacheline_internodealigned_in_smp
63 #endif
64 #endif
65
66 #endif /* __LINUX_CACHE_H */