Optimize the ordering of sections in RW_DATA_SECTION.

The old RW_DATA_SECTION had INIT_TASK_DATA (which was
more-than-PAGE_SIZE-aligned), followed by a bunch of small alignment
stuff, followed by more PAGE_SIZE-aligned stuff, so you wasted memory
in the middle of .data re-aligning back up to PAGE_SIZE.

This patch sorts the sections by alignment requirements, which should
pack them essentially optimally.

Signed-off-by: Tim Abbott <tabbott@ksplice.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 29ca8f53ffbe..b6e818f4b247 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -721,12 +721,12 @@
         . = ALIGN(PAGE_SIZE);                                           \
         .data : AT(ADDR(.data) - LOAD_OFFSET) {                         \
                 INIT_TASK_DATA(inittask)                                \
+                NOSAVE_DATA                                             \
+                PAGE_ALIGNED_DATA(pagealigned)                          \
                 CACHELINE_ALIGNED_DATA(cacheline)                       \
                 READ_MOSTLY_DATA(cacheline)                             \
                 DATA_DATA                                               \
                 CONSTRUCTORS                                            \
-                NOSAVE_DATA                                             \
-                PAGE_ALIGNED_DATA(pagealigned)                          \
         }
 
 #define INIT_TEXT_SECTION(inittext_align)                               \