[MIPS] lockdep: fix TRACE_IRQFLAGS_SUPPORT

In handle_sys and its variants, we must reload some registers which
might be clobbered by trace_hardirqs_on().
Also we must make sure trace_hardirqs_on() called in kernel level (not
exception level).

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 1 insertions, 12 deletions

diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index e71785102206..61362e6fa9ec 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -28,18 +28,7 @@
 NESTED(handle_sys, PT_SIZE, sp)
         .set    noat
         SAVE_SOME
-#ifdef CONFIG_TRACE_IRQFLAGS
-        TRACE_IRQS_ON
-#ifdef CONFIG_64BIT
-        LONG_L  $8, PT_R8(sp)
-        LONG_L  $9, PT_R9(sp)
-#endif
-        LONG_L  $7, PT_R7(sp)
-        LONG_L  $6, PT_R6(sp)
-        LONG_L  $5, PT_R5(sp)
-        LONG_L  $4, PT_R4(sp)
-        LONG_L  $2, PT_R2(sp)
-#endif
+        TRACE_IRQS_ON_RELOAD
         STI
         .set    at