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-rw-r--r--arch/arm/mm/fault.c36
1 files changed, 16 insertions, 20 deletions
diff --git a/arch/arm/mm/fault.c b/arch/arm/mm/fault.c
index 75d491448e4..c04124a095c 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);