1 files changed, 16 insertions, 20 deletions

diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 75d4914..c04124a 100644
--- a/arch/arm/mm/fault.c
+++ b/arch/arm/mm/fault.c
@@ -183,20 +183,20 @@ good_area:
 	 */
 survive:
 	fault = handle_mm_fault(mm, vma, addr & PAGE_MASK, fsr & (1 << 11));
-
-	/*
-	 * Handle the "normal" cases first - successful and sigbus
-	 */
-	switch (fault) {
-	case VM_FAULT_MAJOR:
+	if (unlikely(fault & VM_FAULT_ERROR)) {
+		if (fault & VM_FAULT_OOM)
+			goto out_of_memory;
+		else if (fault & VM_FAULT_SIGBUS)
+			return fault;
+		BUG();
+	}
+	if (fault & VM_FAULT_MAJOR)
 		tsk->maj_flt++;
-		return fault;
-	case VM_FAULT_MINOR:
+	else
 		tsk->min_flt++;
-	case VM_FAULT_SIGBUS:
-		return fault;
-	}
+	return fault;
 
+out_of_memory:
 	if (!is_init(tsk))
 		goto out;
 
@@ -249,7 +249,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	/*
 	 * Handle the "normal" case first - VM_FAULT_MAJOR / VM_FAULT_MINOR
 	 */
-	if (fault >= VM_FAULT_MINOR)
+	if (likely(!(fault & VM_FAULT_ERROR)))
 		return 0;
 
 	/*
@@ -259,8 +259,7 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 	if (!user_mode(regs))
 		goto no_context;
 
-	switch (fault) {
-	case VM_FAULT_OOM:
+	if (fault & VM_FAULT_OOM) {
 		/*
 		 * We ran out of memory, or some other thing
 		 * happened to us that made us unable to handle
@@ -269,17 +268,15 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 		printk("VM: killing process %s\n", tsk->comm);
 		do_exit(SIGKILL);
 		return 0;
-
-	case VM_FAULT_SIGBUS:
+	}
+	if (fault & VM_FAULT_SIGBUS) {
 		/*
 		 * We had some memory, but were unable to
 		 * successfully fix up this page fault.
 		 */
 		sig = SIGBUS;
 		code = BUS_ADRERR;
-		break;
-
-	default:
+	} else {
 		/*
 		 * Something tried to access memory that
 		 * isn't in our memory map..
@@ -287,7 +284,6 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
 		sig = SIGSEGV;
 		code = fault == VM_FAULT_BADACCESS ?
 			SEGV_ACCERR : SEGV_MAPERR;
-		break;
 	}
 
 	__do_user_fault(tsk, addr, fsr, sig, code, regs);