From 9ef461adf9875a0fcaafe4d152a7557740fa1a25 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 22 Apr 2012 01:16:34 -0400 Subject: sh: switch to saved_sigmask-based sigsuspend()/rt_sigsuspend() Complete the move of sh64 to it, trim the crap from prototypes, tidy up a bit. Infrastructure in do_signal() had already been there, in signal_64 as well as in signal_32 (where it was already used). Signed-off-by: Al Viro --- arch/sh/kernel/signal_64.c | 72 +++++++--------------------------------------- 1 file changed, 10 insertions(+), 62 deletions(-) (limited to 'arch/sh/kernel/signal_64.c') diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c index 3c9a6f7dcdce..8f6ed236c932 100644 --- a/arch/sh/kernel/signal_64.c +++ b/arch/sh/kernel/signal_64.c @@ -83,11 +83,12 @@ handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa) * the kernel can handle, and then we build all the user-level signal handling * stack-frames in one go after that. */ -static int do_signal(struct pt_regs *regs, sigset_t *oldset) +static void do_signal(struct pt_regs *regs) { siginfo_t info; int signr; struct k_sigaction ka; + sigset_t *oldset; /* * We want the common case to go fast, which @@ -96,11 +97,11 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) * if so. */ if (!user_mode(regs)) - return 1; + return; if (current_thread_info()->status & TS_RESTORE_SIGMASK) oldset = ¤t->saved_sigmask; - else if (!oldset) + else oldset = ¤t->blocked; signr = get_signal_to_deliver(&info, &ka, regs, 0); @@ -118,7 +119,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) tracehook_signal_handler(signr, &info, &ka, regs, test_thread_flag(TIF_SINGLESTEP)); - return 1; + return; } } @@ -147,71 +148,18 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset) sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); } - return 0; + return; } /* * Atomically swap in the new signal mask, and wait for a signal. */ asmlinkage int -sys_sigsuspend(old_sigset_t mask, - unsigned long r3, unsigned long r4, unsigned long r5, - unsigned long r6, unsigned long r7, - struct pt_regs * regs) +sys_sigsuspend(old_sigset_t mask) { - sigset_t saveset, blocked; - - saveset = current->blocked; - - mask &= _BLOCKABLE; + sigset_t blocked; siginitset(&blocked, mask); - set_current_blocked(&blocked); - - REF_REG_RET = -EINTR; - 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 - it because entry.S will increment it. */ - regs->pc -= 4; - return -EINTR; - } - } -} - -asmlinkage int -sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, - unsigned long r4, unsigned long r5, unsigned long r6, - unsigned long r7, - struct pt_regs * regs) -{ - sigset_t saveset, newset; - - /* XXX: Don't preclude handling different sized sigset_t's. */ - if (sigsetsize != sizeof(sigset_t)) - return -EINVAL; - - if (copy_from_user(&newset, unewset, sizeof(newset))) - return -EFAULT; - sigdelsetmask(&newset, ~_BLOCKABLE); - saveset = current->blocked; - set_current_blocked(&newset); - - REF_REG_RET = -EINTR; - while (1) { - current->state = TASK_INTERRUPTIBLE; - schedule(); - regs->pc += 4; /* because sys_sigreturn decrements the pc */ - if (do_signal(regs, &saveset)) { - /* pc now points at signal handler. Need to decrement - it because entry.S will increment it. */ - regs->pc -= 4; - return -EINTR; - } - } + return sigsuspend(&blocked); } asmlinkage int @@ -732,7 +680,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka, asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags) { if (thread_info_flags & _TIF_SIGPENDING) - do_signal(regs, 0); + do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) { clear_thread_flag(TIF_NOTIFY_RESUME); -- cgit v1.2.3