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    signals/sigaltstack: Report current flag bits in sigaltstack() · 0318bc8a
    Andy Lutomirski 提交于
    sigaltstack()'s reported previous state uses a somewhat odd
    convention, but the concept of flag bits is new, and we can do the
    flag bits sensibly.  Specifically, let's just report them directly.
    
    This will allow saving and restoring the sigaltstack state using
    sigaltstack() to work correctly.
    Signed-off-by: NAndy Lutomirski <luto@kernel.org>
    Cc: Al Viro <viro@zeniv.linux.org.uk>
    Cc: Amanieu d'Antras <amanieu@gmail.com>
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Borislav Petkov <bp@alien8.de>
    Cc: Brian Gerst <brgerst@gmail.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: H. Peter Anvin <hpa@zytor.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Michal Hocko <mhocko@suse.com>
    Cc: Oleg Nesterov <oleg@redhat.com>
    Cc: Pavel Emelyanov <xemul@parallels.com>
    Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Richard Weinberger <richard@nod.at>
    Cc: Sasha Levin <sasha.levin@oracle.com>
    Cc: Shuah Khan <shuahkh@osg.samsung.com>
    Cc: Stas Sergeev <stsp@list.ru>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Vladimir Davydov <vdavydov@parallels.com>
    Cc: linux-api@vger.kernel.org
    Link: http://lkml.kernel.org/r/94b291ec9fd47741a9264851e316e158ded0b00d.1462296606.git.luto@kernel.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>
    0318bc8a
signal.c 94.2 KB