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[PATCH] s390: add read_mostly optimization

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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 <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christian Borntraeger 2006-04-27 18:40:24 -07:00 • committed by Linus Torvalds
commit 58268b97f6
2 changed files with 5 additions and 1 deletions
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include/asm-s390/cache.h
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@ -16,4 +16,6 @@
#define ARCH_KMALLOC_MINALIGN 8
#define __read_mostly __attribute__((__section__(".data.read_mostly")))
#endif