uml: rename pt_regs general-purpose register file

Before the removal of tt mode, access to a register on the skas-mode side of a
pt_regs struct looked like pt_regs.regs.skas.regs.regs[FOO].  This was bad
enough, but it became pt_regs.regs.regs.regs[FOO] with the removal of the
union from the middle.  To get rid of the run of three "regs", the last field
is renamed to "gp".

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 7c037fa..8a6882d 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -201,9 +201,9 @@
 	if (current->thread.forking) {
 	  	memcpy(&p->thread.regs.regs, &regs->regs,
 		       sizeof(p->thread.regs.regs));
-		REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.regs, 0);
+		REGS_SET_SYSCALL_RETURN(p->thread.regs.regs.gp, 0);
 		if (sp != 0)
-			REGS_SP(p->thread.regs.regs.regs) = sp;
+			REGS_SP(p->thread.regs.regs.gp) = sp;
 
 		handler = fork_handler;