[ARM] 2.5.34 update

Update for changes in mainline 2.5.3[01234].

5 files changed, 34 insertions, 22 deletions

diff --git a/arch/arm/kernel/armksyms.c b/arch/arm/kernel/armksyms.c
index 246601aea6a7..fc107e93f404 100644
--- a/arch/arm/kernel/armksyms.c
+++ b/arch/arm/kernel/armksyms.c
@@ -275,7 +275,3 @@ EXPORT_SYMBOL_NOVERS(__down_trylock_failed);
 EXPORT_SYMBOL_NOVERS(__up_wakeup);
 
 EXPORT_SYMBOL(get_wchan);
-
-#ifdef CONFIG_PREEMPT
-EXPORT_SYMBOL(kernel_flag);
-#endif
diff --git a/arch/arm/kernel/init_task.c b/arch/arm/kernel/init_task.c
index 0cdc608bd862..e1c830d099d5 100644
--- a/arch/arm/kernel/init_task.c
+++ b/arch/arm/kernel/init_task.c
@@ -12,7 +12,7 @@
 
 static struct fs_struct init_fs = INIT_FS;
 static struct files_struct init_files = INIT_FILES;
-static struct signal_struct init_signals = INIT_SIGNALS;
+static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 struct mm_struct init_mm = INIT_MM(init_mm);
 
 /*
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index 7c23b75e5e29..cf6c528b3947 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -36,10 +36,6 @@
 #define MEM_SIZE	(16*1024*1024)
 #endif
 
-#ifdef CONFIG_PREEMPT
-spinlock_t kernel_flag __cacheline_aligned_in_smp = SPIN_LOCK_UNLOCKED;
-#endif
-
 #if defined(CONFIG_FPE_NWFPE) || defined(CONFIG_FPE_FASTFPE)
 char fpe_type[8];
 
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 6efd090309ce..6f6701c99712 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -373,7 +373,7 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
 	regs->ARM_r0 = usig;
 	regs->ARM_sp = (unsigned long)frame;
 	regs->ARM_lr = retcode;
-	regs->ARM_pc = handler & (thumb ? ~1 : ~3);
+	regs->ARM_pc = handler;
 
 #ifdef CONFIG_CPU_32
 	regs->ARM_cpsr = cpsr;
@@ -503,7 +503,6 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
  */
 static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 {
-	struct k_sigaction *ka;
 	siginfo_t info;
 	int single_stepping;
 
@@ -519,11 +518,22 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 	single_stepping = ptrace_cancel_bpt(current);
 
 	for (;;) {
-		unsigned long signr;
-
-		spin_lock_irq (&current->sigmask_lock);
-		signr = dequeue_signal(&current->blocked, &info);
-		spin_unlock_irq (&current->sigmask_lock);
+		unsigned long signr = 0;
+		struct k_sigaction *ka;
+		sigset_t *mask = &current->blocked;
+
+		local_irq_disable();
+		if (current->sig->shared_pending.head) {
+			spin_lock(&current->sig->siglock);
+			signr = dequeue_signal(&current->sig->shared_pending, mask, &info);
+			spin_unlock(&current->sig->siglock);
+		}
+		if (!signr) {
+			spin_lock(&current->sigmask_lock);
+			signr = dequeue_signal(&current->pending, mask, &info);
+			spin_unlock(&current->sigmask_lock);
+		}
+		local_irq_enable();
 
 		if (!signr)
 			break;
@@ -531,13 +541,14 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 		if ((current->ptrace & PT_PTRACED) && signr != SIGKILL) {
 			/* Let the debugger run.  */
 			current->exit_code = signr;
-			current->state = TASK_STOPPED;
+			set_current_state(TASK_STOPPED);
 			notify_parent(current, SIGCHLD);
 			schedule();
 			single_stepping |= ptrace_cancel_bpt(current);
 
 			/* We're back.  Did the debugger cancel the sig?  */
-			if (!(signr = current->exit_code))
+			signr = current->exit_code;
+			if (signr == 0)
 				continue;
 			current->exit_code = 0;
 
@@ -589,7 +600,7 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 
 			case SIGSTOP: {
 				struct signal_struct *sig;
-				current->state = TASK_STOPPED;
+				set_current_state(TASK_STOPPED);
 				current->exit_code = signr;
 				sig = current->parent->sig;
 				if (sig && !(sig->action[SIGCHLD-1].sa.sa_flags & SA_NOCLDSTOP))
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index 34713adaf4dc..47f4ff685a19 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -239,7 +239,7 @@ asmlinkage int sys_ipc (uint call, int first, int second, int third, void *ptr,
 asmlinkage int sys_fork(struct pt_regs *regs)
 {
 	struct task_struct *p;
-	p = do_fork(SIGCHLD, regs->ARM_sp, regs, 0);
+	p = do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
@@ -249,16 +249,25 @@ asmlinkage int sys_fork(struct pt_regs *regs)
 asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, struct pt_regs *regs)
 {
 	struct task_struct *p;
+
+	/*
+	 * We don't support SETTID / CLEARTID
+	 */
+	if (clone_flags & (CLONE_SETTID | CLONE_CLEARTID))
+		return -EINVAL;
+
 	if (!newsp)
 		newsp = regs->ARM_sp;
-	p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, regs, 0);
+
+	p = do_fork(clone_flags & ~CLONE_IDLETASK, newsp, regs, 0, NULL);
+
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }
 
 asmlinkage int sys_vfork(struct pt_regs *regs)
 {
 	struct task_struct *p;
-	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0);
+	p = do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL);
 	return IS_ERR(p) ? PTR_ERR(p) : p->pid;
 }