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>

diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 3790a32..5379969 100644 (file)
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -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)