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authorRussell King <rmk+kernel@arm.linux.org.uk>2010-12-04 20:08:32 +0300
committerRussell King <rmk+kernel@arm.linux.org.uk>2010-12-05 11:39:36 +0300
commitdaf8741675562197d4fb4c4e9d773f53494203a5 (patch)
treea21505624d4c7963ae70e46f25b13f449c22cc18 /arch/arm/include/asm/cache.h
parent0b05da7200dd56a5364c4d9cf5441715c1d706ed (diff)
downloadlinux-daf8741675562197d4fb4c4e9d773f53494203a5.tar.xz
ARM: implement support for read-mostly sections
As our SMP implementation uses MESI protocols. Grouping together data which is mostly only read together means that we avoid unnecessary cache line bouncing when this code shares a cache line with other data. In other words, cache lines associated with read-mostly data are expected to spend most of their time in shared state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/cache.h')
-rw-r--r--arch/arm/include/asm/cache.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/include/asm/cache.h b/arch/arm/include/asm/cache.h
index 9d6122096fbe..75fe66bc02b4 100644
--- a/arch/arm/include/asm/cache.h
+++ b/arch/arm/include/asm/cache.h
@@ -23,4 +23,6 @@
#define ARCH_SLAB_MINALIGN 8
#endif
+#define __read_mostly __attribute__((__section__(".data..read_mostly")))
+
#endif