[PATCH] sparc32: fix missing handling for VM fault codes

Fix missing cases for vm fault codes in sparc32 fault handling, and
convert the entire file to using symbolic fault codes. This fixes a
latent bug where an allocation failure returns to the kernel instead of
delivering an error as expected.
Signed-off-by: William Irwin <wli@holomorphy.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/sparc/mm/fault.c

@@ -294,16 +294,17 @@ asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,
 	 * the fault.
 	 */
 	switch (handle_mm_fault(mm, vma, address, write)) {
-	case 1:
-		current->min_flt++;
-		break;
-	case 2:
+	case VM_FAULT_SIGBUS:
+		goto do_sigbus;
+	case VM_FAULT_OOM:
+		goto out_of_memory;
+	case VM_FAULT_MAJOR:
 		current->maj_flt++;
 		break;
-	case 0:
-		goto do_sigbus;
+	case VM_FAULT_MINOR:
 	default:
-		goto out_of_memory;
+		current->min_flt++;
+		break;
 	}
 	up_read(&mm->mmap_sem);
 	return;
@@ -535,8 +536,11 @@ inline void force_user_fault(unsigned long address, int write)
 		if(!(vma->vm_flags & (VM_READ | VM_EXEC)))
 			goto bad_area;
 	}
-	if (!handle_mm_fault(mm, vma, address, write))
+	switch (handle_mm_fault(mm, vma, address, write)) {
+	case VM_FAULT_SIGBUS:
+	case VM_FAULT_OOM:
 		goto do_sigbus;
+	}
 	up_read(&mm->mmap_sem);
 	return;
 bad_area: