Messages in this thread Patch in this message | | | From | Matt Fleming <> | Subject | [PATCH v2 12/43] m32r: Use set_current_blocked() and block_sigmask() | Date | Fri, 19 Aug 2011 17:46:28 +0100 |
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From: Matt Fleming <matt.fleming@intel.com>
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 <oleg@redhat.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Kyle McMartin <kyle@redhat.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com> ---
v2 of this patch depends on "[PATCH 01/43] signal: Add block_sigmask() for adding sigmask to current->blocked" so they need to go through the same tree but this patch would benefit from some maintainer ACK's.
arch/m32r/kernel/signal.c | 12 ++---------- 1 files changed, 2 insertions(+), 10 deletions(-)
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c index a08697f..f54d969 100644 --- a/arch/m32r/kernel/signal.c +++ b/arch/m32r/kernel/signal.c @@ -112,10 +112,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1, 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, &result)) goto badframe; @@ -300,12 +297,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, if (setup_rt_frame(sig, ka, info, oldset, regs)) return -EFAULT; - 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 0; } -- 1.7.4.4
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