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parisc: don't bother looping in do_signal() 

entry.S code had been looping until no pending signals are left
since 2005 anyway; no need to bother with that in do_signal()
itself.  If the failure to set a sigframe up raises SIGSEGV,
we'll just pick it up the next time around the loop(s) in entry.S
anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-05-19 01:13:01 -04:00
parent 00df111e7e
commit e3b880c6ee
1 changed files with 7 additions and 22 deletions
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29
arch/parisc/kernel/signal.c
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@ -439,7 +439,7 @@ give_sigsegv:
* OK, we're invoking a handler.
*/
static long
static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
struct pt_regs *regs, int in_syscall)
{
@ -449,7 +449,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
/* Set up the stack frame */
if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
return 0;
return;
signal_delivered(sig, info, ka, regs,
test_thread_flag(TIF_SINGLESTEP) ||
@ -457,8 +457,6 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
regs->gr[28]);
return 1;
}
static inline void
@ -570,30 +568,17 @@ do_signal(struct pt_regs *regs, long in_syscall)
DBG(1,"\ndo_signal: regs=0x%p, sr7 %#lx, in_syscall=%d\n",
regs, regs->sr[7], in_syscall);
/* Everyone else checks to see if they are in kernel mode at
this point and exits if that's the case. I'm not sure why
we would be called in that case, but for some reason we
are. */
/* May need to force signal if handle_signal failed to deliver */
while (1) {
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
if (signr <= 0)
break;
if (signr > 0) {
/* Restart a system call if necessary. */
if (in_syscall)
syscall_restart(regs, &ka);
/* Whee! Actually deliver the signal. If the
delivery failed, we need to continue to iterate in
this loop so we can deliver the SIGSEGV... */
if (handle_signal(signr, &info, &ka, regs, in_syscall))
return;
handle_signal(signr, &info, &ka, regs, in_syscall);
return;
}
/* end of while(1) looping forever if we can't force a signal */
/* Did we come from a system call? */
if (in_syscall)