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    Subject[tip:sched/core] sched, task_struct: stack_canary is not needed without CC_STACKPROTECTOR
    Commit-ID:  1314562a9ae5f39f6f595656023c1baf970831ef
    Gitweb: http://git.kernel.org/tip/1314562a9ae5f39f6f595656023c1baf970831ef
    Author: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
    AuthorDate: Tue, 18 Aug 2009 15:06:02 +0900
    Committer: Ingo Molnar <mingo@elte.hu>
    CommitDate: Tue, 18 Aug 2009 15:45:11 +0200

    sched, task_struct: stack_canary is not needed without CC_STACKPROTECTOR

    The field stack_canary is only used with CC_STACKPROTECTOR.
    This patch reduces task_struct size without CC_STACKPROTECTOR.

    Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
    LKML-Reference: <4A8A44CA.2020701@ct.jp.nec.com>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>


    ---
    include/linux/sched.h | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/include/linux/sched.h b/include/linux/sched.h
    index 195d72d..7bc2d92 100644
    --- a/include/linux/sched.h
    +++ b/include/linux/sched.h
    @@ -1237,8 +1237,10 @@ struct task_struct {
    pid_t pid;
    pid_t tgid;

    +#ifdef CONFIG_CC_STACKPROTECTOR
    /* Canary value for the -fstack-protector gcc feature */
    unsigned long stack_canary;
    +#endif

    /*
    * pointers to (original) parent process, youngest child, younger sibling,

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