Eric Lee / smarc-fsl-linux-kernel

23 Jul, 2007

4 commits

  • 19d36ccdc   x86: Fix alternatives and kprobes to remap write-protected kernel text ... Browse Code »

    Reenable kprobes and alternative patching when the kernel text is write
    protected by DEBUG_RODATA

    Add a general utility function to change write protected text. The new
    function remaps the code using vmap to write it and takes care of CPU
    synchronization. It also does CLFLUSH to make icache recovery faster.

    There are some limitations on when the function can be used, see the
    comment.

    This is a newer version that also changes the paravirt_ops code.
    text_poke also supports multi byte patching now.

    Contains bug fixes from Zach Amsden and suggestions from Mathieu
    Desnoyers.

    Cc: Jan Beulich
    Cc: Jeremy Fitzhardinge
    Cc: Mathieu Desnoyers
    Cc: Zach Amsden
    Signed-off-by: Andi Kleen
    Signed-off-by: Linus Torvalds

    Andi Kleen
     
  • f51c94528   x86_64: Use read and write crX in .c files ... Browse Code »

    This patch uses the read and write functions provided at system.h
    for control registers instead of writting raw assembly over and
    over again in .c files. Functions to manipulate cr2 and cr8 were
    provided, as they were lacking.

    Also, removed some extra space after closing brackets

    Signed-off-by: Glauber de Oliveira Costa
    Signed-off-by: Andi Kleen
    Signed-off-by: Linus Torvalds

    Glauber de Oliveira Costa
     
  • abd4f7505   x86: i386-show-unhandled-signals-v3 ... Browse Code »

    This patch makes the i386 behave the same way that x86_64 does when a
    segfault happens. A line gets printed to the kernel log so that tools
    that need to check for failures can behave more uniformly between
    debug.show_unhandled_signals sysctl variable to 0 (or by doing echo 0 >
    /proc/sys/debug/exception-trace)

    Also, all of the lines being printed are now using printk_ratelimit() to
    deny the ability of DoS from a local user with a program like the
    following:

    main()
    {
    while (1)
    if (!fork()) *(int *)0 = 0;
    }

    This new revision also includes the fix that Andrew did which got rid of
    new sysctl that was added to the system in earlier versions of this.
    Also, 'show-unhandled-signals' sysctl has been renamed back to the old
    'exception-trace' to avoid breakage of people's scripts.

    AK: Enabling by default for i386 will be likely controversal, but let's see what happens
    AK: Really folks, before complaining just fix your segfaults
    AK: I bet this will find a lot of silent issues

    Signed-off-by: Masoud Sharbiani
    Signed-off-by: Andi Kleen
    [ Personally, I've found the complaints useful on x86-64, so I'm all for
    this. That said, I wonder if we could do it more prettily.. -Linus ]
    Signed-off-by: Linus Torvalds

    Masoud Asgharifard Sharbiani
     
  • 5fa63fccc   Fix ppc64 mismerge ... Browse Code »

    Fix a mismerge in commit 8b6f50ef1d5cc86b278eb42bc91630fad455fb10:
    "spufs: make signal-notification files readonly for NOSCHED contexts",
    where structs got duplicated.

    Signed-off-by: Al Viro
    Acked-by: Jeremy Kerr
    Signed-off-by: Linus Torvalds

    Al Viro
     

22 Jul, 2007

36 commits