[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
@@ -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
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