Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild

[linux-2.6] / arch / ppc / mm / fault.c

diff --git a/arch/ppc/mm/fault.c b/arch/ppc/mm/fault.c
index 5cdfb71fcb078ca50f56059a907e0104ab452194..b98244e277fbc97857af375d6fb7339f39c5deb7 100644 (file)
--- a/arch/ppc/mm/fault.c
+++ b/arch/ppc/mm/fault.c
@@ -96,6 +96,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
        struct mm_struct *mm = current->mm;
        siginfo_t info;
        int code = SEGV_MAPERR;
+       int fault;
 #if defined(CONFIG_4xx) || defined (CONFIG_BOOKE)
        int is_write = error_code & ESR_DST;
 #else
@@ -239,7 +240,7 @@ good_area:
                /* protection fault */
                if (error_code & 0x08000000)
                        goto bad_area;
-               if (!(vma->vm_flags & (VM_READ | VM_EXEC)))
+               if (!(vma->vm_flags & (VM_READ | VM_EXEC | VM_WRITE)))
                        goto bad_area;
        }
 
@@ -249,20 +250,18 @@ good_area:
         * the fault.
         */
  survive:
-        switch (handle_mm_fault(mm, vma, address, is_write)) {
-        case VM_FAULT_MINOR:
-                current->min_flt++;
-                break;
-        case VM_FAULT_MAJOR:
-                current->maj_flt++;
-                break;
-        case VM_FAULT_SIGBUS:
-                goto do_sigbus;
-        case VM_FAULT_OOM:
-                goto out_of_memory;
-       default:
+       fault = handle_mm_fault(mm, vma, address, is_write);
+       if (unlikely(fault & VM_FAULT_ERROR)) {
+               if (fault & VM_FAULT_OOM)
+                       goto out_of_memory;
+               else if (fault & VM_FAULT_SIGBUS)
+                       goto do_sigbus;
                BUG();
        }
+       if (fault & VM_FAULT_MAJOR)
+               current->maj_flt++;
+       else
+               current->min_flt++;
 
        up_read(&mm->mmap_sem);
        /*
@@ -291,7 +290,7 @@ bad_area:
  */
 out_of_memory:
        up_read(&mm->mmap_sem);
-       if (current->pid == 1) {
+       if (is_init(current)) {
                yield();
                down_read(&mm->mmap_sem);
                goto survive;