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authorPaul Mundt <lethal@linux-sh.org>2009-10-14 16:05:42 +0900
committerPaul Mundt <lethal@linux-sh.org>2009-10-14 16:05:42 +0900
commit56bfc42f6cba3e831094c01a23fbbb17a20bbdf8 (patch)
treedee2d956aa6b17ba41428aec3d47e91bb6fac569 /arch/sh/kernel/signal_64.c
parentMerge branch 'sh/stable-updates' (diff)
downloadlinux-dev-56bfc42f6cba3e831094c01a23fbbb17a20bbdf8.tar.xz
linux-dev-56bfc42f6cba3e831094c01a23fbbb17a20bbdf8.zip
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.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index 74793c80a57a..feb3dddd3192 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 = &current->saved_sigmask;
else if (!oldset)
oldset = &current->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, &current->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