microblaze: invoke oom-killer from page fault

As explained in commit 1c0fe6e3bd, we want to call the architecture independent
oom killer when getting an unexplained OOM from handle_mm_fault, rather than
simply killing current.

Cc: microblaze-uclinux@itee.uq.edu.au
Cc: Michal Simek <monstr@monstr.eu>
Cc: linux-arch@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Simek <monstr@monstr.eu>

1 files changed, 4 insertions, 9 deletions

diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c
index 7af87f4b2c2c..bab922993185 100644
--- a/arch/microblaze/mm/fault.c
+++ b/arch/microblaze/mm/fault.c
@@ -273,16 +273,11 @@ bad_area_nosemaphore:
  * us unable to handle the page fault gracefully.
  */
 out_of_memory:
-        if (current->pid == 1) {
-                yield();
-                down_read(&mm->mmap_sem);
-                goto survive;
-        }
         up_read(&mm->mmap_sem);
-        printk(KERN_WARNING "VM: killing process %s\n", current->comm);
-        if (user_mode(regs))
-                do_exit(SIGKILL);
-        bad_page_fault(regs, address, SIGKILL);
+        if (!user_mode(regs))
+                bad_page_fault(regs, address, SIGKILL);
+        else
+                pagefault_out_of_memory();
         return;
 
 do_sigbus: