[PATCH 3/6] Add new CACHELINE_ALIGNED_DATA linker script macro.

[Tim Abbott]

This patch is preparation for replacing most ".data.cacheline_aligned"
in the kernel with macros, so that the section name can later be
changed without having to touch a lot of the kernel.

The long-term goal here is to be able to change the kernel's magic
section names to those that are compatible with -ffunction-sections
-fdata-sections.  This requires renaming all magic sections with names
of the form ".data.foo".

Signed-off-by: Tim Abbott <tabbott at mit.edu>
Cc: Sam Ravnborg <sam at ravnborg.org>
---
 include/asm-generic/vmlinux.lds.h |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index f5ebd2b..fa7801b 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -131,6 +131,10 @@
 	. = ALIGN(PAGE_SIZE);						\
 	__nosave_end = .;
 
+#define CACHELINE_ALIGNED_DATA(alignment)				\
+	. = ALIGN(alignment);						\
+	*(.data.cacheline_aligned)
+
 #define RO_DATA(align)							\
 	. = ALIGN((align));						\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
-- 
1.6.2.1