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>

diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 304882e56459b70d90b661622b54066452a38d74..ab4f1e159308fc5caaefb3af08547bdbd60464ef 100644 (file)
--- 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