[PATCH v2 2/6] Add new NOSAVE_DATA linker script macro.

[Tim Abbott]

This patch is preparation for replacing most ".data.nosave" 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 |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 3d88c87..f5ebd2b 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -124,6 +124,13 @@
 	. = ALIGN(PAGE_SIZE);						\
 	*(.bss.page_aligned)
 
+#define NOSAVE_DATA							\
+	. = ALIGN(PAGE_SIZE);						\
+	__nosave_begin = .;						\
+	*(.data.nosave)							\
+	. = ALIGN(PAGE_SIZE);						\
+	__nosave_end = .;
+
 #define RO_DATA(align)							\
 	. = ALIGN((align));						\
 	.rodata           : AT(ADDR(.rodata) - LOAD_OFFSET) {		\
-- 
1.6.2.1