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| author | Dmitry Shmidt <dimitrysh@google.com> | 2016-09-26 12:54:41 -0700 |
|---|---|---|
| committer | Dmitry Shmidt <dimitrysh@google.com> | 2016-09-26 14:58:53 -0700 |
| commit | 8760f8e3d9806a940d759c9e12fff7eb7130b9ab (patch) | |
| tree | 3471f2a1dd633efdda95765f905ff2f3d4455175 /include/linux/cache.h | |
| parent | 734bcf32c23442e81891641ae05e08108a4010d5 (diff) | |
| parent | 4055d6b56ac1de5b900ce6f0b484996aa357ee66 (diff) | |
Merge remote-tracking branch 'common/android-4.4' into android-4.4.y
Change-Id: I6c4e7f9f47392d4b334f71e2b20f2ccf33827632
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 |