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authorChristian Borntraeger <cborntra@de.ibm.com>2006-04-27 18:40:24 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-28 08:33:48 -0700
commit58268b97f679108d32a882a7fc029585da801975 (patch)
tree5b416785ab2fc75f5f26f56863b96329e274fe08 /include/asm-s390
parentb73d40c6178f2c8b2d574db566b47f36e3d12072 (diff)
downloadop-kernel-dev-58268b97f679108d32a882a7fc029585da801975.zip
op-kernel-dev-58268b97f679108d32a882a7fc029585da801975.tar.gz
[PATCH] s390: add read_mostly optimization
Add a read_mostly section and define __read_mostly to prevent cache line pollution due to writes for mostly read variables. In addition fix the incorrect alignment of the cache_line_aligned data section. s390 has a cacheline size of 256 bytes. Signed-off-by: Christian Borntraeger <cborntra@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-s390')
-rw-r--r--include/asm-s390/cache.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-s390/cache.h b/include/asm-s390/cache.h
index e20cdd9..cdf431b 100644
--- a/include/asm-s390/cache.h
+++ b/include/asm-s390/cache.h
@@ -16,4 +16,6 @@
#define ARCH_KMALLOC_MINALIGN 8
+#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+
#endif
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