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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 introduced in commit 5e6292c0f2
("signal: add block_sigmask() for adding sigmask to current->blocked")
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: Arnd Bergmann <arnd@arndb.de>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
This commit is contained in:
Matt Fleming 2012-02-14 11:41:06 +00:00 committed by Chris Metcalf
parent cf8c1dafe1
commit ad09233835
2 changed files with 3 additions and 15 deletions
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5
arch/tile/kernel/compat_signal.c
View File

@ -303,10 +303,7 @@ long compat_sys_rt_sigreturn(struct pt_regs *regs)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;

13
arch/tile/kernel/signal.c
View File

@ -97,10 +97,7 @@ SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->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(&current->sighand->siglock);
sigorsets(&current->blocked,
&current->blocked, &ka->sa.sa_mask);
if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(&current->blocked, sig);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
block_sigmask(ka, sig);
}
return ret;