diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2009-10-14 16:05:42 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2009-10-14 16:05:42 +0900 |
| commit | 56bfc42f6cba3e831094c01a23fbbb17a20bbdf8 (patch) | |
| tree | dee2d956aa6b17ba41428aec3d47e91bb6fac569 /arch/sh/kernel/signal_64.c | |
| parent | b195e46677bed5f044bc2eede65fd41c886ef5b2 (diff) | |
sh: TS_RESTORE_SIGMASK conversion.
Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own
set_restore_sigmask() function. This saves the costly SMP-safe set_bit
operation, which we do not need for the sigmask flag since TIF_SIGPENDING
always has to be set too.
Based on the x86 and powerpc change.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/signal_64.c')
| -rw-r--r-- | arch/sh/kernel/signal_64.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c index 74793c80a57..feb3dddd319 100644 --- a/arch/sh/kernel/signal_64.c +++ b/arch/sh/kernel/signal_64.c @@ -101,7 +101,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) if (try_to_freeze()) goto no_signal; - if (test_thread_flag(TIF_RESTORE_SIGMASK)) + if (current_thread_info()->status & TS_RESTORE_SIGMASK) oldset = ¤t->saved_sigmask; else if (!oldset) oldset = ¤t->blocked; @@ -115,11 +115,9 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) /* * If a signal was successfully delivered, the * saved sigmask is in its frame, and we can - * clear the TIF_RESTORE_SIGMASK flag. + * clear the TS_RESTORE_SIGMASK flag. */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; tracehook_signal_handler(signr, &info, &ka, regs, 0); return 1; } @@ -146,8 +144,8 @@ no_signal: } /* No signal to deliver -- put the saved sigmask back */ - if (test_thread_flag(TIF_RESTORE_SIGMASK)) { - clear_thread_flag(TIF_RESTORE_SIGMASK); + if (current_thread_info()->status & TS_RESTORE_SIGMASK) { + current_thread_info()->status &= ~TS_RESTORE_SIGMASK; sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } @@ -176,6 +174,7 @@ sys_sigsuspend(old_sigset_t mask, while (1) { current->state = TASK_INTERRUPTIBLE; schedule(); + set_restore_sigmask(); regs->pc += 4; /* because sys_sigreturn decrements the pc */ if (do_signal(regs, &saveset)) { /* pc now points at signal handler. Need to decrement |