Merge tag 'for-3.4' of git://openrisc.net/jonas/linux

Pull OpenRISC changes for 3.4 from Jonas Bonn:
 "This series for the OpenRISC architecture consists of mostly trivial
  fixups.  The most interesting bits of the series are:

  * A fix to the timer code whereby the shortest trigger period is set
    to 100 cycles; previously, it was possible to set this to 1 cycle,
    but by the time the register was written, that time had already
    passed and the timer interrupt would not go off until the cycle
    counter had gone a full cycle.

  * Allowing a device tree binary to be passed in to the kernel from
    u-boot.  The OpenRISC architecture has been recently merged into
    upstream u-boot, so this change gets OpenRISC Linux into sync with
    that project."

* tag 'for-3.4' of git://openrisc.net/jonas/linux:
  OpenRISC: Remove memory_start/end prototypes
  openrisc: remove semicolon from KSTK_ defs
  openrisc: sanitize use of orig_gpr11
  openrisc: fix virt_addr_valid
  OpenRISC: Export dump_stack()
  OpenRISC: Select GENERIC_ATOMIC64
  openrisc: Set shortest clock event to 100 ticks
  openrisc: included linux/thread_info.h twice
  OpenRISC: Use set_current_blocked() and block_sigmask()
  OpenRISC: Don't mask signals if we fail to setup signal stack
  OpenRISC: No need to reset handler if SA_ONESHOT
  OpenRISC: Don't reimplement force_sigsegv()
  openrisc: enable passing of flattened device tree pointer
  arch/openrisc/mm/init.c: trivial: use BUG_ON

1 files changed, 20 insertions, 27 deletions

diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index 95207ab0c99..e970743251a 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -102,10 +102,7 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
                 goto badframe;
 
         sigdelsetmask(&set, ~_BLOCKABLE);
-        spin_lock_irq(&current->sighand->siglock);
-        current->blocked = set;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
+        set_current_blocked(&set);
 
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
                 goto badframe;
@@ -189,8 +186,8 @@ static inline void __user *get_sigframe(struct k_sigaction *ka,
  * trampoline which performs the syscall sigreturn, or a provided
  * user-mode trampoline.
  */
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
-                           sigset_t *set, struct pt_regs *regs)
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+                          sigset_t *set, struct pt_regs *regs)
 {
         struct rt_sigframe *frame;
         unsigned long return_ip;
@@ -247,31 +244,27 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         /* actually move the usp to reflect the stacked frame */
         regs->sp = (unsigned long)frame;
 
-        return;
+        return 0;
 
 give_sigsegv:
-        if (sig == SIGSEGV)
-                ka->sa.sa_handler = SIG_DFL;
-        force_sig(SIGSEGV, current);
+        force_sigsegv(sig, current);
+        return -EFAULT;
 }
 
-static inline void
+static inline int
 handle_signal(unsigned long sig,
               siginfo_t *info, struct k_sigaction *ka,
               sigset_t *oldset, struct pt_regs *regs)
 {
-        setup_rt_frame(sig, ka, info, oldset, regs);
+        int ret;
 
-        if (ka->sa.sa_flags & SA_ONESHOT)
-                ka->sa.sa_handler = SIG_DFL;
+        ret = setup_rt_frame(sig, ka, info, oldset, regs);
+        if (ret)
+                return ret;
 
-        spin_lock_irq(&current->sighand->siglock);
-        sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
-        if (!(ka->sa.sa_flags & SA_NODEFER))
-                sigaddset(&current->blocked, sig);
-        recalc_sigpending();
+        block_sigmask(ka, sig);
 
-        spin_unlock_irq(&current->sighand->siglock);
+        return 0;
 }
 
 /*
@@ -312,7 +305,7 @@ void do_signal(struct pt_regs *regs)
          * below mean that the syscall executed to completion and no
          * restart is necessary.
          */
-        if (regs->syscallno) {
+        if (regs->orig_gpr11) {
                 int restart = 0;
 
                 switch (regs->gpr[11]) {
@@ -360,13 +353,13 @@ void do_signal(struct pt_regs *regs)
                         oldset = &current->blocked;
 
                 /* Whee!  Actually deliver the signal.  */
-                handle_signal(signr, &info, &ka, oldset, regs);
-                /* a signal was successfully delivered; the saved
-                 * sigmask will have been stored in the signal frame,
-                 * and will be restored by sigreturn, so we can simply
-                 * clear the TIF_RESTORE_SIGMASK flag */
-                if (test_thread_flag(TIF_RESTORE_SIGMASK))
+                if (!handle_signal(signr, &info, &ka, oldset, regs)) {
+                        /* a signal was successfully delivered; the saved
+                         * sigmask will have been stored in the signal frame,
+                         * and will be restored by sigreturn, so we can simply
+                         * clear the TIF_RESTORE_SIGMASK flag */
                         clear_thread_flag(TIF_RESTORE_SIGMASK);
+                }
 
                 tracehook_signal_handler(signr, &info, &ka, regs,
                                          test_thread_flag(TIF_SINGLESTEP));