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    Subject[PATCH 3.12 024/142] parisc: Fix __ARCH_SI_PREAMBLE_SIZE
    Date
    From: Helge Deller <deller@gmx.de>

    3.12-stable review patch. If anyone has any objections, please let me know.

    ===============

    commit e60fc5aa608eb38b47ba4ee058f306f739eb70a0 upstream.

    On a 64bit kernel build the compiler aligns the _sifields union in the
    struct siginfo_t on a 64bit address. The __ARCH_SI_PREAMBLE_SIZE define
    compensates for this alignment and thus fixes the wait testcase of the
    strace package.

    The symptoms of a wrong __ARCH_SI_PREAMBLE_SIZE value is that
    _sigchld.si_stime variable is missed to be copied and thus after a
    copy_siginfo() will have uninitialized values.

    Signed-off-by: Helge Deller <deller@gmx.de>
    Signed-off-by: Jiri Slaby <jslaby@suse.cz>
    ---
    arch/parisc/include/uapi/asm/siginfo.h | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/arch/parisc/include/uapi/asm/siginfo.h b/arch/parisc/include/uapi/asm/siginfo.h
    index d7034728f377..1c75565d984b 100644
    --- a/arch/parisc/include/uapi/asm/siginfo.h
    +++ b/arch/parisc/include/uapi/asm/siginfo.h
    @@ -1,6 +1,10 @@
    #ifndef _PARISC_SIGINFO_H
    #define _PARISC_SIGINFO_H

    +#if defined(__LP64__)
    +#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
    +#endif
    +
    #include <asm-generic/siginfo.h>

    #undef NSIGTRAP
    --
    2.7.1
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