MIPS: Prevent hitting do_notify_resume() with !user_mode(regs).

Too late to do anything there...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 37acfa036d44..4b0937f19862 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -167,6 +167,9 @@ work_notifysig:				# deal with pending signals and
 FEXPORT(syscall_exit_work_partial)
         SAVE_STATIC
 syscall_exit_work:
+        LONG_L  t0, PT_STATUS(sp)               # returning to kernel mode?
+        andi    t0, t0, KU_USER
+        beqz    t0, resume_kernel
         li      t0, _TIF_WORK_SYSCALL_EXIT
         and     t0, a2                  # a2 is preloaded with TI_FLAGS
         beqz    t0, work_pending        # trace bit set?