Eric Lee / smarc-fsl-linux-kernel

24 Sep, 2009

1 commit

  • 2bcd57ab6   headers: utsname.h redux ... Browse Code »

    * remove asm/atomic.h inclusion from linux/utsname.h --
    not needed after kref conversion
    * remove linux/utsname.h inclusion from files which do not need it

    NOTE: it looks like fs/binfmt_elf.c do not need utsname.h, however
    due to some personality stuff it _is_ needed -- cowardly leave ELF-related
    headers and files alone.

    Signed-off-by: Alexey Dobriyan
    Signed-off-by: Linus Torvalds

    Alexey Dobriyan
     

14 Jan, 2009

3 commits

14 Nov, 2008

2 commits

11 Apr, 2008

1 commit

  • 54a015104   asmlinkage_protect replaces prevent_tail_call ... Browse Code »

    The prevent_tail_call() macro works around the problem of the compiler
    clobbering argument words on the stack, which for asmlinkage functions
    is the caller's (user's) struct pt_regs. The tail/sibling-call
    optimization is not the only way that the compiler can decide to use
    stack argument words as scratch space, which we have to prevent.
    Other optimizations can do it too.

    Until we have new compiler support to make "asmlinkage" binding on the
    compiler's own use of the stack argument frame, we have work around all
    the manifestations of this issue that crop up.

    More cases seem to be prevented by also keeping the incoming argument
    variables live at the end of the function. This makes their original
    stack slots attractive places to leave those variables, so the compiler
    tends not clobber them for something else. It's still no guarantee, but
    it handles some observed cases that prevent_tail_call() did not.

    Signed-off-by: Roland McGrath
    Signed-off-by: Linus Torvalds

    Roland McGrath
     

09 May, 2007

1 commit

20 Apr, 2006

1 commit

  • 5a7b46b36   [PATCH] Add more prevent_tail_call() ... Browse Code »

    Those also break userland regs like following.

    00000000 :
    0: 0f b7 44 24 0c movzwl 0xc(%esp),%eax
    5: 83 ca ff or $0xffffffff,%edx
    8: 0f b7 4c 24 08 movzwl 0x8(%esp),%ecx
    d: 66 83 f8 ff cmp $0xffffffff,%ax
    11: 0f 44 c2 cmove %edx,%eax
    14: 66 83 f9 ff cmp $0xffffffff,%cx
    18: 0f 45 d1 cmovne %ecx,%edx
    1b: 89 44 24 0c mov %eax,0xc(%esp)
    1f: 89 54 24 08 mov %edx,0x8(%esp)
    23: e9 fc ff ff ff jmp 24

    where the tailcall at the end overwrites the incoming stack-frame.

    Signed-off-by: OGAWA Hirofumi
    [ I would _really_ like to have a way to tell gcc about calling
    conventions. The "prevent_tail_call()" macro is pretty ugly ]
    Signed-off-by: Linus Torvalds

    OGAWA Hirofumi
     

12 Jan, 2006

1 commit

  • c59ede7b7   [PATCH] move capable() to capability.h ... Browse Code »

    - Move capable() from sched.h to capability.h;

    - Use where capable() is used
    (in include/, block/, ipc/, kernel/, a few drivers/,
    mm/, security/, & sound/;
    many more drivers/ to go)

    Signed-off-by: Randy Dunlap
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Randy.Dunlap
     

17 Apr, 2005

1 commit

  • 1da177e4c   Linux-2.6.12-rc2 ... Browse Code »

    Initial git repository build. I'm not bothering with the full history,
    even though we have it. We can create a separate "historical" git
    archive of that later if we want to, and in the meantime it's about
    3.2GB when imported into git - space that would just make the early
    git days unnecessarily complicated, when we don't have a lot of good
    infrastructure for it.

    Let it rip!

    Linus Torvalds