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    Subject[PATCH 33/41] xtensa: Don't reimplement force_sigsegv()
    Date
    From: Matt Fleming <matt.fleming@intel.com>

    Instead of open coding the sequence from force_sigsegv() just call
    it. This also fixes a race because sa_handler was being modified
    without holding ->sighand->siglock.

    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Chris Zankel <chris@zankel.net>
    Signed-off-by: Matt Fleming <matt.fleming@intel.com>
    ---
    arch/xtensa/kernel/signal.c | 4 +---
    1 files changed, 1 insertions(+), 3 deletions(-)

    diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
    index f2220b5..4f53770 100644
    --- a/arch/xtensa/kernel/signal.c
    +++ b/arch/xtensa/kernel/signal.c
    @@ -425,9 +425,7 @@ static void setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
    return;

    give_sigsegv:
    - if (sig == SIGSEGV)
    - ka->sa.sa_handler = SIG_DFL;
    - force_sig(SIGSEGV, current);
    + force_sigsegv(sig, current);
    }

    /*
    --
    1.7.4.4


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