ARC: gdbserver breakage in Big-Endian configuration #2

[Based on mainline commit 352c1d95e3220d0: "ARC: stop using
pt_regs->orig_r8"]

Stop using orig_r8 as it could get clobbered by ST in trap_with_param,
and further it is semantically not needed either.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 2 insertions, 3 deletions

diff --git a/arch/arc/include/asm/syscall.h b/arch/arc/include/asm/syscall.h
index 33ab3048e9b2..29de09804306 100644
--- a/arch/arc/include/asm/syscall.h
+++ b/arch/arc/include/asm/syscall.h
@@ -18,7 +18,7 @@ static inline long
 syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 {
         if (user_mode(regs) && in_syscall(regs))
-                return regs->orig_r8;
+                return regs->r8;
         else
                 return -1;
 }
@@ -26,8 +26,7 @@ syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
 static inline void
 syscall_rollback(struct task_struct *task, struct pt_regs *regs)
 {
-        /* XXX: I can't fathom how pt_regs->r8 will be clobbered ? */
-        regs->r8 = regs->orig_r8;
+        regs->r0 = regs->orig_r0;
 }
 
 static inline long