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author | Alex Shi <alex.shi@linaro.org> | 2016-04-11 11:16:39 +0800 |
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committer | Alex Shi <alex.shi@linaro.org> | 2016-04-11 11:16:39 +0800 |
commit | d83731cf53fd3af7173cab5e3f573d06ebc852be (patch) | |
tree | d61002ed1d894fe2d9b26003a1230f05a61ed51b /include/linux/cache.h | |
parent | bfbd381ea0ca274e4c07ea62acaaeac31829cd5d (diff) | |
parent | 017cfa86c2450b158d7d0336f2f3ea685da1230b (diff) |
Merge branch 'linux-linaro-lsk-v4.1' into linux-linaro-lsk-v4.1-rtlsk-v4.1-16.04-rt
Diffstat (limited to 'include/linux/cache.h')
-rw-r--r-- | include/linux/cache.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/cache.h b/include/linux/cache.h index 17e7e82d2aa7..1be04f8c563a 100644 --- a/include/linux/cache.h +++ b/include/linux/cache.h @@ -12,10 +12,24 @@ #define SMP_CACHE_BYTES L1_CACHE_BYTES #endif +/* + * __read_mostly is used to keep rarely changing variables out of frequently + * updated cachelines. If an architecture doesn't support it, ignore the + * hint. + */ #ifndef __read_mostly #define __read_mostly #endif +/* + * __ro_after_init is used to mark things that are read-only after init (i.e. + * after mark_rodata_ro() has been called). These are effectively read-only, + * but may get written to during init, so can't live in .rodata (via "const"). + */ +#ifndef __ro_after_init +#define __ro_after_init __attribute__((__section__(".data..ro_after_init"))) +#endif + #ifndef ____cacheline_aligned #define ____cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES))) #endif |