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authorTim Abbott <tabbott@ksplice.com>2009-06-23 19:59:35 -0400
committerSam Ravnborg <sam@ravnborg.org>2009-06-26 17:58:39 -0400
commitd2af12aeadaedf657c9fb9c3df984d2c5ab25f4c (patch)
tree13e4e43971b0ab4164ad5c7d6acdd2dc7168fbe6
parent73f1d9391a6aa72efdcea2f302ee7bfcd313c631 (diff)
Add new macros for page-aligned data and bss sections.
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@ksplice.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
-rw-r--r--include/linux/linkage.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index fee9e59649c1..691f59171c6c 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -22,6 +22,15 @@
22#define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE) 22#define __page_aligned_bss __section(.bss.page_aligned) __aligned(PAGE_SIZE)
23 23
24/* 24/*
25 * For assembly routines.
26 *
27 * Note when using these that you must specify the appropriate
28 * alignment directives yourself
29 */
30#define __PAGE_ALIGNED_DATA .section ".data.page_aligned", "aw"
31#define __PAGE_ALIGNED_BSS .section ".bss.page_aligned", "aw"
32
33/*
25 * This is used by architectures to keep arguments on the stack 34 * This is used by architectures to keep arguments on the stack
26 * untouched by the compiler by keeping them live until the end. 35 * untouched by the compiler by keeping them live until the end.
27 * The argument stack may be owned by the assembly-language 36 * The argument stack may be owned by the assembly-language