[PATCH] __cacheline_aligned always in own section

[Rusty Russell <rusty@rustcorp.com.au>]

Name: Always Put Cache Aligned Code in Own Section: Even Modules
Status: Tested on 2.6.3-bk7

We put ____cacheline_aligned things in their own section, simply
because we waste less space that way.  Otherwise we end up padding
innocent variables to the next cacheline to get the required
alignment.

There's no reason not to do this in modules, too.

diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .16274-linux-2.6.3-bk7/include/linux/cache.h .16274-linux-2.6.3-bk7.updated/include/linux/cache.h
--- .16274-linux-2.6.3-bk7/include/linux/cache.h	2003-09-22 09:47:16.000000000 +1000
+++ .16274-linux-2.6.3-bk7.updated/include/linux/cache.h	2004-02-26 16:43:49.000000000 +1100
@@ -26,13 +26,9 @@
 #endif
 
 #ifndef __cacheline_aligned
-#ifdef MODULE
-#define __cacheline_aligned ____cacheline_aligned
-#else
 #define __cacheline_aligned					\
   __attribute__((__aligned__(SMP_CACHE_BYTES),			\
 		 __section__(".data.cacheline_aligned")))
-#endif
 #endif /* __cacheline_aligned */
 
 #ifndef __cacheline_aligned_in_smp

--
  Anyone who quotes me in their sig is an idiot. -- Rusty Russell.