Merge branch 'android-2.6.36' into android-tegra-2.6.36

Conflicts:
	drivers/input/touchscreen/Kconfig

Change-Id: Ifc75266e258f9513d78c47c12e2f1de1d2344f02

4 files changed, 87 insertions, 3 deletions

diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S
index a38b4879441d..90ecfa32a226 100644
--- a/arch/arm/kernel/debug.S
+++ b/arch/arm/kernel/debug.S
@@ -22,7 +22,7 @@
 #if defined(CONFIG_DEBUG_ICEDCC)
 		@@ debug using ARM EmbeddedICE DCC channel
 
-#if defined(CONFIG_CPU_V6)
+#if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V7)
 
 		.macro	addruart, rx, tmp
 		.endm
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 69141f0b8388..3161faf3d2e8 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -245,6 +245,77 @@ void machine_restart(char *cmd)
 	arm_pm_restart(reboot_mode, cmd);
 }
 
+/*
+ * dump a block of kernel memory from around the given address
+ */
+static void show_data(unsigned long addr, int nbytes, const char *name)
+{
+	int	i, j;
+	int	nlines;
+	u32	*p;
+
+	/*
+	 * don't attempt to dump non-kernel addresses or
+	 * values that are probably just small negative numbers
+	 */
+	if (addr < PAGE_OFFSET || addr > -256UL)
+		return;
+
+	printk("\n%s: %#lx:\n", name, addr);
+
+	/*
+	 * round address down to a 32 bit boundary
+	 * and always dump a multiple of 32 bytes
+	 */
+	p = (u32 *)(addr & ~(sizeof(u32) - 1));
+	nbytes += (addr & (sizeof(u32) - 1));
+	nlines = (nbytes + 31) / 32;
+
+
+	for (i = 0; i < nlines; i++) {
+		/*
+		 * just display low 16 bits of address to keep
+		 * each line of the dump < 80 characters
+		 */
+		printk("%04lx ", (unsigned long)p & 0xffff);
+		for (j = 0; j < 8; j++) {
+			u32	data;
+			if (probe_kernel_address(p, data)) {
+				printk(" ********");
+			} else {
+				printk(" %08x", data);
+			}
+			++p;
+		}
+		printk("\n");
+	}
+}
+
+static void show_extra_register_data(struct pt_regs *regs, int nbytes)
+{
+	mm_segment_t fs;
+
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	show_data(regs->ARM_pc - nbytes, nbytes * 2, "PC");
+	show_data(regs->ARM_lr - nbytes, nbytes * 2, "LR");
+	show_data(regs->ARM_sp - nbytes, nbytes * 2, "SP");
+	show_data(regs->ARM_ip - nbytes, nbytes * 2, "IP");
+	show_data(regs->ARM_fp - nbytes, nbytes * 2, "FP");
+	show_data(regs->ARM_r0 - nbytes, nbytes * 2, "R0");
+	show_data(regs->ARM_r1 - nbytes, nbytes * 2, "R1");
+	show_data(regs->ARM_r2 - nbytes, nbytes * 2, "R2");
+	show_data(regs->ARM_r3 - nbytes, nbytes * 2, "R3");
+	show_data(regs->ARM_r4 - nbytes, nbytes * 2, "R4");
+	show_data(regs->ARM_r5 - nbytes, nbytes * 2, "R5");
+	show_data(regs->ARM_r6 - nbytes, nbytes * 2, "R6");
+	show_data(regs->ARM_r7 - nbytes, nbytes * 2, "R7");
+	show_data(regs->ARM_r8 - nbytes, nbytes * 2, "R8");
+	show_data(regs->ARM_r9 - nbytes, nbytes * 2, "R9");
+	show_data(regs->ARM_r10 - nbytes, nbytes * 2, "R10");
+	set_fs(fs);
+}
+
 void __show_regs(struct pt_regs *regs)
 {
 	unsigned long flags;
@@ -304,6 +375,8 @@ void __show_regs(struct pt_regs *regs)
 		printk("Control: %08x%s\n", ctrl, buf);
 	}
 #endif
+
+	show_extra_register_data(regs, 128);
 }
 
 void show_regs(struct pt_regs * regs)
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 907d5a620bca..15c46d27ca27 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -602,6 +602,14 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 
 static inline void setup_syscall_restart(struct pt_regs *regs)
 {
+	if (regs->ARM_ORIG_r0 == -ERESTARTNOHAND ||
+	    regs->ARM_ORIG_r0 == -ERESTARTSYS ||
+	    regs->ARM_ORIG_r0 == -ERESTARTNOINTR ||
+	    regs->ARM_ORIG_r0 == -ERESTART_RESTARTBLOCK) {
+		/* the syscall cannot be safely restarted, return -EINTR instead */
+		regs->ARM_r0 = -EINTR;
+		return;
+	}
 	regs->ARM_r0 = regs->ARM_ORIG_r0;
 	regs->ARM_pc -= thumb_mode(regs) ? 2 : 4;
 }
@@ -734,6 +742,7 @@ static void do_signal(struct pt_regs *regs, int syscall)
 	 */
 	if (syscall) {
 		if (regs->ARM_r0 == -ERESTART_RESTARTBLOCK) {
+			regs->ARM_r0 = -EAGAIN; /* prevent multiple restarts */
 			if (thumb_mode(regs)) {
 				regs->ARM_r7 = __NR_restart_syscall - __NR_SYSCALL_BASE;
 				regs->ARM_pc -= 2;
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index cda78d59aa31..17c5649340ad 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -454,7 +454,9 @@ do_cache_op(unsigned long start, unsigned long end, int flags)
 		if (end > vma->vm_end)
 			end = vma->vm_end;
 
-		flush_cache_user_range(vma, start, end);
+		up_read(&mm->mmap_sem);
+		flush_cache_user_range(start, end);
+		return;
 	}
 	up_read(&mm->mmap_sem);
 }
@@ -524,7 +526,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 		if (has_tls_reg) {
 			asm ("mcr p15, 0, %0, c13, c0, 3"
 				: : "r" (regs->ARM_r0));
-		} else {
+		} /*else*/ {
 			/*
 			 * User space must never try to access this directly.
 			 * Expect your app to break eventually if you do so.