1. 16 1月, 2009 1 次提交
  2. 15 1月, 2009 1 次提交
  3. 14 1月, 2009 1 次提交
    • A
      x86, generic: mark complex bitops.h inlines as __always_inline · c8399943
      Andi Kleen 提交于
      Impact: reduce kernel image size
      
      Hugh Dickins noticed that older gcc versions when the kernel
      is built for code size didn't inline some of the bitops.
      
      Mark all complex x86 bitops that have more than a single
      asm statement or two as always inline to avoid this problem.
      
      Probably should be done for other architectures too.
      
      Ingo then found a better fix that only requires
      a single line change, but it unfortunately only
      works on gcc 4.3.
      
      On older gccs the original patch still makes a ~0.3% defconfig
      difference with CONFIG_OPTIMIZE_INLINING=y.
      
      With gcc 4.1 and a defconfig like build:
      
          6116998 1138540  883788 8139326  7c323e vmlinux-oi-with-patch
          6137043 1138540  883788 8159371  7c808b vmlinux-optimize-inlining
      
      ~20k / 0.3% difference.
      Signed-off-by: NAndi Kleen <ak@linux.intel.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      c8399943
  4. 13 1月, 2009 6 次提交
  5. 11 1月, 2009 5 次提交
  6. 10 1月, 2009 26 次提交