microblaze: Fix sys_rt_sigreturn_wrapper

Do not save return registers before rt_sigreturn is called.
_user_exception(syscall handler) already setup return address
that's why it is removed from rt_sigreturn_wrapper.

Signed-off-by: Michal Simek <monstr@monstr.eu>

1 files changed, 1 insertions, 7 deletions

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 304882e56459..ab4f1e159308 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -458,14 +458,8 @@ C_ENTRY(sys_execve):
         addik   r8, r1, PTO;            /* add user context as 4th arg */
 
 C_ENTRY(sys_rt_sigreturn_wrapper):
-        swi     r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-        swi     r4, r1, PTO+PT_R4;
-        brlid   r15, sys_rt_sigreturn   /* Do real work */
+        brid    sys_rt_sigreturn        /* Do real work */
         addik   r5, r1, PTO;            /* add user context as 1st arg */
-        lwi     r3, r1, PTO+PT_R3; /* restore saved r3, r4 registers */
-        lwi     r4, r1, PTO+PT_R4;
-        bri ret_from_trap /* fall through will not work here due to align */
-        nop;
 
 /*
  * HW EXCEPTION rutine start