[PATCH 1/2] Add new macros for page-aligned data and bss sections.

From: Tim Abbott
Date: Tue Jun 23 2009 - 20:06:02 EST

This patch is preparation for replacing most uses of
".bss.page_aligned" and ".data.page_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@xxxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Acked-by: David Howells <dhowells@xxxxxxxxxx>
include/linux/linkage.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index fee9e59..691f591 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -22,6 +22,15 @@
#define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE)

+ * For assembly routines.
+ *
+ * Note when using these that you must specify the appropriate
+ * alignment directives yourself
+ */
+#define __PAGE_ALIGNED_DATA .section ".data.page_aligned", "aw"
+#define __PAGE_ALIGNED_BSS .section ".bss.page_aligned", "aw"
* This is used by architectures to keep arguments on the stack
* untouched by the compiler by keeping them live until the end.
* The argument stack may be owned by the assembly-language

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/