sh: 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: linux-sh@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

2 files changed, 8 insertions, 24 deletions

diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c
index 8bf79e3b7bdd..93c3447ed40a 100644
--- a/arch/sh/mm/fault_32.c
+++ b/arch/sh/mm/fault_32.c
@@ -290,15 +290,10 @@ no_context:
  */
 out_of_memory:
         up_read(&mm->mmap_sem);
-        if (is_global_init(current)) {
-                yield();
-                down_read(&mm->mmap_sem);
-                goto survive;
-        }
-        printk("VM: killing process %s\n", tsk->comm);
-        if (user_mode(regs))
-                do_group_exit(SIGKILL);
-        goto no_context;
+        if (!user_mode(regs))
+                goto no_context;
+        pagefault_out_of_memory();
+        return;
 
 do_sigbus:
         up_read(&mm->mmap_sem);
diff --git a/arch/sh/mm/tlbflush_64.c b/arch/sh/mm/tlbflush_64.c
index 706da1d3a67a..25bd64c0977c 100644
--- a/arch/sh/mm/tlbflush_64.c
+++ b/arch/sh/mm/tlbflush_64.c
@@ -294,22 +294,11 @@ no_context:
  * us unable to handle the page fault gracefully.
  */
 out_of_memory:
-        if (is_global_init(current)) {
-                panic("INIT out of memory\n");
-                yield();
-                goto survive;
-        }
-        printk("fault:Out of memory\n");
         up_read(&mm->mmap_sem);
-        if (is_global_init(current)) {
-                yield();
-                down_read(&mm->mmap_sem);
-                goto survive;
-        }
-        printk("VM: killing process %s\n", tsk->comm);
-        if (user_mode(regs))
-                do_group_exit(SIGKILL);
-        goto no_context;
+        if (!user_mode(regs))
+                goto no_context;
+        pagefault_out_of_memory();
+        return;
 
 do_sigbus:
         printk("fault:Do sigbus\n");