x86: cacheline_align tss_struct

The manual padding to align on cacheline size only worked in 32 bit
In 64 bit the structure was not aligned and contained wasted space.

use the compiler ____cachline_aligned to save space & properly align
this structure.

x86_64_default size goes from 9136 -> 8960
x86_64_AMD     size goes from 9136 -> 8896

built & running on 2.6.26-rc8.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 5 deletions

diff --git a/include/asm-x86/processor.h b/include/asm-x86/processor.h
index 559105220a47..4ab2ede6f4b9 100644
--- a/include/asm-x86/processor.h
+++ b/include/asm-x86/processor.h
@@ -263,15 +263,11 @@ struct tss_struct {
         struct thread_struct    *io_bitmap_owner;
 
         /*
-         * Pad the TSS to be cacheline-aligned (size is 0x100):
-         */
-        unsigned long           __cacheline_filler[35];
-        /*
          * .. and then another 0x100 bytes for the emergency kernel stack:
          */
         unsigned long           stack[64];
 
-} __attribute__((packed));
+} ____cacheline_aligned;
 
 DECLARE_PER_CPU(struct tss_struct, init_tss);