From: Shaohua Li <shaohua.li@intel.com>
Date: Thu, 13 Jan 2011 00:59:38 +0000 (-0800)
Subject: include/asm-generic/vmlinux.lds.h: make readmostly section correctly align
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=8369744fc4418743d3d84a8490d576e3dbf01594;p=openwrt%2Fstaging%2Fblogic.git

include/asm-generic/vmlinux.lds.h: make readmostly section correctly align

The readmostly section should end at a cacheline aligned address,
otherwise the last several data might share cachline with other data and
make the readmostly data still have cache bounce.

For example, in ia64, secpath_cachep is the last readmostly data, and it
shares cacheline with init_uts_ns.

a000000100e80480 d secpath_cachep
a000000100e80488 D init_uts_ns

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 05cbad03c5ab..68649336c4ad 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -200,7 +200,8 @@
 
 #define READ_MOSTLY_DATA(align)						\
 	. = ALIGN(align);						\
-	*(.data..read_mostly)
+	*(.data..read_mostly)						\
+	. = ALIGN(align);
 
 #define CACHELINE_ALIGNED_DATA(align)					\
 	. = ALIGN(align);						\