Merge branch 'ioat' into fixes

5 files changed, 17 insertions, 8 deletions

diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S
index 0022b4d57f8..d2903e3bc86 100644
--- a/arch/arm/kernel/entry-armv.S
+++ b/arch/arm/kernel/entry-armv.S
@@ -21,6 +21,7 @@
 #include <mach/entry-macro.S>
 #include <asm/thread_notify.h>
 #include <asm/unwind.h>
+#include <asm/unistd.h>
 
 #include "entry-header.S"
 
@@ -908,10 +909,10 @@ __kuser_cmpxchg:				@ 0xffff0fc0
 	 * A special ghost syscall is used for that (see traps.c).
 	 */
 	stmfd	sp!, {r7, lr}
-	mov	r7, #0xff00		@ 0xfff0 into r7 for EABI
-	orr	r7, r7, #0xf0
-	swi	#0x9ffff0
+	ldr	r7, =1f			@ it's 20 bits
+	swi	__ARM_NR_cmpxchg
 	ldmfd	sp!, {r7, pc}
+1:	.word	__ARM_NR_cmpxchg
 
 #elif __LINUX_ARM_ARCH__ < 6
 
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 885a7214418..b9505aa267c 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -97,7 +97,7 @@ __error_a:
 	bl	printhex8
 	adr	r0, str_a2
 	bl	printascii
-	adr	r3, 3f
+	adr	r3, 4f
 	ldmia	r3, {r4, r5, r6}		@ get machine desc list
 	sub	r4, r3, r4			@ get offset between virt&phys
 	add	r5, r5, r4			@ convert virt addresses to
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 2a573d4fea2..e7714f367eb 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -662,8 +662,12 @@ static void do_signal(struct pt_regs *regs, int syscall)
 				regs->ARM_sp -= 4;
 				usp = (u32 __user *)regs->ARM_sp;
 
-				put_user(regs->ARM_pc, usp);
-				regs->ARM_pc = KERN_RESTART_CODE;
+				if (put_user(regs->ARM_pc, usp) == 0) {
+					regs->ARM_pc = KERN_RESTART_CODE;
+				} else {
+					regs->ARM_sp += 4;
+					force_sigsegv(0, current);
+				}
 #endif
 			}
 		}
diff --git a/arch/arm/kernel/smp_scu.c b/arch/arm/kernel/smp_scu.c
index d3831f616ee..9ab4149bd98 100644
--- a/arch/arm/kernel/smp_scu.c
+++ b/arch/arm/kernel/smp_scu.c
@@ -37,6 +37,10 @@ void __init scu_enable(void __iomem *scu_base)
 	u32 scu_ctrl;
 
 	scu_ctrl = __raw_readl(scu_base + SCU_CTRL);
+	/* already enabled? */
+	if (scu_ctrl & 1)
+		return;
+
 	scu_ctrl |= 1;
 	__raw_writel(scu_ctrl, scu_base + SCU_CTRL);
 
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 95718a6b50a..3f361a783f4 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -528,7 +528,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 	 * __kuser_cmpxchg code in entry-armv.S should be aware of its
 	 * existence.  Don't ever use this from user code.
 	 */
-	case 0xfff0:
+	case NR(cmpxchg):
 	for (;;) {
 		extern void do_DataAbort(unsigned long addr, unsigned int fsr,
 					 struct pt_regs *regs);
@@ -573,7 +573,7 @@ asmlinkage int arm_syscall(int no, struct pt_regs *regs)
 		   if not implemented, rather than raising SIGILL.  This
 		   way the calling program can gracefully determine whether
 		   a feature is supported.  */
-		if (no <= 0x7ff)
+		if ((no & 0xffff) <= 0x7ff)
 			return -ENOSYS;
 		break;
 	}