From 2211a7b7e445c7af1ae5d319be7347c3805be6fc Mon Sep 17 00:00:00 2001 From: Matt Fleming Date: Fri, 19 Aug 2011 17:46:48 +0100 Subject: [PATCH] tile: Use set_current_blocked() and block_sigmask() As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function block_sigmask() which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Cc: Oleg Nesterov Cc: Arnd Bergmann Cc: Chris Metcalf Signed-off-by: Matt Fleming Signed-off-by: Oleg Nesterov --- arch/tile/kernel/compat_signal.c | 5 +---- arch/tile/kernel/signal.c | 13 ++----------- 2 files changed, 3 insertions(+), 15 deletions(-) diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index a7869ad62776..77763ccd5a7d 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -303,10 +303,7 @@ long compat_sys_rt_sigreturn(struct pt_regs *regs) goto badframe; sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c index bedaf4e9f3a7..f79d4b88c747 100644 --- a/arch/tile/kernel/signal.c +++ b/arch/tile/kernel/signal.c @@ -97,10 +97,7 @@ SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs) goto badframe; sigdelsetmask(&set, ~_BLOCKABLE); - spin_lock_irq(¤t->sighand->siglock); - current->blocked = set; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + set_current_blocked(&set); if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; @@ -286,13 +283,7 @@ static int handle_signal(unsigned long sig, siginfo_t *info, * the work_pending path in the return-to-user code, and * either way we can re-enable interrupts unconditionally. */ - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, - ¤t->blocked, &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, sig); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + block_sigmask(ka, sig); } return ret; -- 2.39.5