ARC: pt_regs update #3: Remove unused gutter at start of callee_regs

This is trickier than prev two:

* context switching code saves kernel mode callee regs in the format of
  struct callee_regs thus needs adjustment. This also reduces the height
  of topmost kernel stack frame by 1 word.

* Since kernel stack unwinder is sensitive to height of topmost kernel
  stack frame, that needs a word of adjustment too.

ptrace needs a bit of updating since pt_regs now diverges from
user_regs_struct.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arc/include/uapi/asm/ptrace.h b/arch/arc/include/uapi/asm/ptrace.h
index e0e8403f181f..4599109f68f2 100644
--- a/arch/arc/include/uapi/asm/ptrace.h
+++ b/arch/arc/include/uapi/asm/ptrace.h
@@ -38,8 +38,8 @@ struct user_regs_struct {
                 long r12, r11, r10, r9, r8, r7, r6, r5, r4, r3, r2, r1, r0;
                 long sp;
         } scratch;
+        long pad2;
         struct {
-                long pad;
                 long r25, r24, r23, r22, r21, r20;
                 long r19, r18, r17, r16, r15, r14, r13;
         } callee;