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/sys-x86_64/signal.c b/arch/um/sys-x86_64/signal.c
index 9001d17..c98dd7f 100644
--- a/arch/um/sys-x86_64/signal.c
+++ b/arch/um/sys-x86_64/signal.c
@@ -16,7 +16,7 @@
 	struct sigcontext *sc = from;
 
 #define GETREG(regs, regno, sc, regname)				\
-	(regs)->regs[(regno) / sizeof(unsigned long)] = (sc)->regname
+	(regs)->gp[(regno) / sizeof(unsigned long)] = (sc)->regname
 
 	GETREG(regs, R8, sc, r8);
 	GETREG(regs, R9, sc, r9);
@@ -47,7 +47,7 @@
 	int err = 0;
 
 #define GETREG(regs, regno, sc, regname)				\
-	__get_user((regs)->regs.regs[(regno) / sizeof(unsigned long)],	\
+	__get_user((regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
 		   &(sc)->regname)
 
 	err |= GETREG(regs, R8, from, r8);
@@ -86,7 +86,7 @@
 	err |= __put_user(0, &to->fs);
 
 #define PUTREG(regs, regno, sc, regname)				\
-	__put_user((regs)->regs.regs[(regno) / sizeof(unsigned long)],	\
+	__put_user((regs)->regs.gp[(regno) / sizeof(unsigned long)],	\
 		   &(sc)->regname)
 
 	err |= PUTREG(regs, RDI, to, rdi);