1 files changed, 24 insertions, 25 deletions

diff --git a/arch/openrisc/mm/fault.c b/arch/openrisc/mm/fault.c
index ca97d9baab51..29e232d78d82 100644
--- a/arch/openrisc/mm/fault.c
+++ b/arch/openrisc/mm/fault.c
@@ -18,21 +18,21 @@
 #include <linux/perf_event.h>
 
 #include <linux/uaccess.h>
+#include <asm/bug.h>
+#include <asm/mmu_context.h>
 #include <asm/siginfo.h>
 #include <asm/signal.h>
 
 #define NUM_TLB_ENTRIES 64
 #define TLB_OFFSET(add) (((add) >> PAGE_SHIFT) & (NUM_TLB_ENTRIES-1))
 
-unsigned long pte_misses;	/* updated by do_page_fault() */
-unsigned long pte_errors;	/* updated by do_page_fault() */
-
 /* __PHX__ :: - check the vmalloc_fault in do_page_fault()
- *            - also look into include/asm-or32/mmu_context.h
+ *            - also look into include/asm/mmu_context.h
  */
 volatile pgd_t *current_pgd[NR_CPUS];
 
-extern void die(char *, struct pt_regs *, long);
+asmlinkage void do_page_fault(struct pt_regs *regs, unsigned long address,
+			      unsigned long vector, int write_acc);
 
 /*
  * This routine handles page faults.  It determines the address,
@@ -129,8 +129,9 @@ retry:
 		if (address + PAGE_SIZE < regs->sp)
 			goto bad_area;
 	}
-	if (expand_stack(vma, address))
-		goto bad_area;
+	vma = expand_stack(mm, address);
+	if (!vma)
+		goto bad_area_nosemaphore;
 
 	/*
 	 * Ok, we have a good vm_area for this memory access, so
@@ -164,7 +165,14 @@ good_area:
 
 	fault = handle_mm_fault(vma, address, flags, regs);
 
-	if (fault_signal_pending(fault, regs))
+	if (fault_signal_pending(fault, regs)) {
+		if (!user_mode(regs))
+			goto no_context;
+		return;
+	}
+
+	/* The fault is fully completed (including releasing mmap lock) */
+	if (fault & VM_FAULT_COMPLETED)
 		return;
 
 	if (unlikely(fault & VM_FAULT_ERROR)) {
@@ -177,18 +185,16 @@ good_area:
 		BUG();
 	}
 
-	if (flags & FAULT_FLAG_ALLOW_RETRY) {
-		/*RGD modeled on Cris */
-		if (fault & VM_FAULT_RETRY) {
-			flags |= FAULT_FLAG_TRIED;
+	/*RGD modeled on Cris */
+	if (fault & VM_FAULT_RETRY) {
+		flags |= FAULT_FLAG_TRIED;
 
-			 /* No need to mmap_read_unlock(mm) as we would
-			 * have already released it in __lock_page_or_retry
-			 * in mm/filemap.c.
-			 */
+		/* No need to mmap_read_unlock(mm) as we would
+		 * have already released it in __lock_page_or_retry
+		 * in mm/filemap.c.
+		 */
 
-			goto retry;
-		}
+		goto retry;
 	}
 
 	mmap_read_unlock(mm);
@@ -225,8 +231,6 @@ no_context:
 	{
 		const struct exception_table_entry *entry;
 
-		__asm__ __volatile__("l.nop 42");
-
 		if ((entry = search_exception_tables(regs->pc)) != NULL) {
 			/* Adjust the instruction pointer in the stackframe */
 			regs->pc = entry->fixup;
@@ -248,17 +252,12 @@ no_context:
 
 	die("Oops", regs, write_acc);
 
-	do_exit(SIGKILL);
-
 	/*
 	 * We ran out of memory, or some other thing happened to us that made
 	 * us unable to handle the page fault gracefully.
 	 */
 
 out_of_memory:
-	__asm__ __volatile__("l.nop 42");
-	__asm__ __volatile__("l.nop 1");
-
 	mmap_read_unlock(mm);
 	if (!user_mode(regs))
 		goto no_context;