Merge branch 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc

Pull arch signal handling cleanup from Richard Weinberger:
 "This patch series moves all remaining archs to the get_signal(),
  signal_setup_done() and sigsp() functions.

  Currently these archs use open coded variants of the said functions.
  Further, unused parameters get removed from get_signal_to_deliver(),
  tracehook_signal_handler() and signal_delivered().

  At the end of the day we save around 500 lines of code."

* 'signal-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc: (43 commits)
  powerpc: Use sigsp()
  openrisc: Use sigsp()
  mn10300: Use sigsp()
  mips: Use sigsp()
  microblaze: Use sigsp()
  metag: Use sigsp()
  m68k: Use sigsp()
  m32r: Use sigsp()
  hexagon: Use sigsp()
  frv: Use sigsp()
  cris: Use sigsp()
  c6x: Use sigsp()
  blackfin: Use sigsp()
  avr32: Use sigsp()
  arm64: Use sigsp()
  arc: Use sigsp()
  sas_ss_flags: Remove nested ternary if
  Rip out get_signal_to_deliver()
  Clean up signal_delivered()
  tracehook_signal_handler: Remove sig, info, ka and regs
  ...

1 files changed, 16 insertions, 27 deletions

diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 98b67d5f1514..4612321c73cc 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -331,17 +331,17 @@ gen_return_code(unsigned char *codemem)
 }
 
 
-static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-                       sigset_t *set, struct pt_regs *regs)
+static int setup_frame(struct ksignal *ksig, sigset_t *set,
+                       struct pt_regs *regs)
 {
         struct rt_sigframe *frame;
-        int err = 0;
+        int err = 0, sig = ksig->sig;
         int signal;
         unsigned long sp, ra, tp;
 
         sp = regs->areg[1];
 
-        if ((ka->sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) {
+        if ((ksig->ka.sa.sa_flags & SA_ONSTACK) != 0 && sas_ss_flags(sp) == 0) {
                 sp = current->sas_ss_sp + current->sas_ss_size;
         }
 
@@ -351,7 +351,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 panic ("Double exception sys_sigreturn\n");
 
         if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame))) {
-                goto give_sigsegv;
+                return -EFAULT;
         }
 
         signal = current_thread_info()->exec_domain
@@ -360,8 +360,8 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 ? current_thread_info()->exec_domain->signal_invmap[sig]
                 : sig;
 
-        if (ka->sa.sa_flags & SA_SIGINFO) {
-                err |= copy_siginfo_to_user(&frame->info, info);
+        if (ksig->ka.sa.sa_flags & SA_SIGINFO) {
+                err |= copy_siginfo_to_user(&frame->info, &ksig->info);
         }
 
         /* Create the user context.  */
@@ -372,8 +372,8 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         err |= setup_sigcontext(frame, regs);
         err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
 
-        if (ka->sa.sa_flags & SA_RESTORER) {
-                ra = (unsigned long)ka->sa.sa_restorer;
+        if (ksig->ka.sa.sa_flags & SA_RESTORER) {
+                ra = (unsigned long)ksig->ka.sa.sa_restorer;
         } else {
 
                 /* Create sys_rt_sigreturn syscall in stack frame */
@@ -381,7 +381,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 err |= gen_return_code(frame->retcode);
 
                 if (err) {
-                        goto give_sigsegv;
+                        return -EFAULT;
                 }
                 ra = (unsigned long) frame->retcode;
         }
@@ -393,7 +393,7 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 
         /* Set up registers for signal handler; preserve the threadptr */
         tp = regs->threadptr;
-        start_thread(regs, (unsigned long) ka->sa.sa_handler,
+        start_thread(regs, (unsigned long) ksig->ka.sa.sa_handler,
                      (unsigned long) frame);
 
         /* Set up a stack frame for a call4
@@ -416,10 +416,6 @@ static int setup_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
 #endif
 
         return 0;
-
-give_sigsegv:
-        force_sigsegv(sig, current);
-        return -EFAULT;
 }
 
 /*
@@ -433,15 +429,11 @@ give_sigsegv:
  */
 static void do_signal(struct pt_regs *regs)
 {
-        siginfo_t info;
-        int signr;
-        struct k_sigaction ka;
+        struct ksignal ksig;
 
         task_pt_regs(current)->icountlevel = 0;
 
-        signr = get_signal_to_deliver(&info, &ka, regs, NULL);
-
-        if (signr > 0) {
+        if (get_signal(&ksig)) {
                 int ret;
 
                 /* Are we from a system call? */
@@ -457,7 +449,7 @@ static void do_signal(struct pt_regs *regs)
                                         break;
 
                                 case -ERESTARTSYS:
-                                        if (!(ka.sa.sa_flags & SA_RESTART)) {
+                                        if (!(ksig.ka.sa.sa_flags & SA_RESTART)) {
                                                 regs->areg[2] = -EINTR;
                                                 break;
                                         }
@@ -476,11 +468,8 @@ static void do_signal(struct pt_regs *regs)
 
                 /* Whee!  Actually deliver the signal.  */
                 /* Set up the stack frame */
-                ret = setup_frame(signr, &ka, &info, sigmask_to_save(), regs);
-                if (ret)
-                        return;
-
-                signal_delivered(signr, &info, &ka, regs, 0);
+                ret = setup_frame(&ksig, sigmask_to_save(), regs);
+                signal_setup_done(ret, &ksig, 0);
                 if (current->ptrace & PT_SINGLESTEP)
                         task_pt_regs(current)->icountlevel = 1;