ARM: fix build error in arch/arm/kernel/process.c

/tmp/ccJ3ssZW.s: Assembler messages:
/tmp/ccJ3ssZW.s:1952: Error: can't resolve `.text' {.text section} - `.LFB1077'

This is caused because:

	.section .data
	.section .text
	.section .text
	.previous

does not return us to the .text section, but the .data section; this
makes use of .previous dangerous if the ordering of previous sections
is not known.

Fix up the other users of .previous; .pushsection and .popsection are
a safer pairing to use than .section and .previous.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index edddd66..a2ab51f 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -166,15 +166,15 @@
  THUMB(	"1:	"ins"	%1, [%2]\n"	)		\
  THUMB(	"	add	%2, %2, #1\n"	)		\
 	"2:\n"						\
-	"	.section .fixup,\"ax\"\n"		\
+	"	.pushsection .fixup,\"ax\"\n"		\
 	"	.align	2\n"				\
 	"3:	mov	%0, #1\n"			\
 	"	b	2b\n"				\
-	"	.previous\n"				\
-	"	.section __ex_table,\"a\"\n"		\
+	"	.popsection\n"				\
+	"	.pushsection __ex_table,\"a\"\n"	\
 	"	.align	3\n"				\
 	"	.long	1b, 3b\n"			\
-	"	.previous\n"				\
+	"	.popsection\n"				\
 	: "=r" (err), "=&r" (val), "=r" (addr)		\
 	: "0" (err), "2" (addr))
 
@@ -226,16 +226,16 @@
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
 		"2:	"ins"	%1, [%2]\n"			\
 		"3:\n"						\
-		"	.section .fixup,\"ax\"\n"		\
+		"	.pushsection .fixup,\"ax\"\n"		\
 		"	.align	2\n"				\
 		"4:	mov	%0, #1\n"			\
 		"	b	3b\n"				\
-		"	.previous\n"				\
-		"	.section __ex_table,\"a\"\n"		\
+		"	.popsection\n"				\
+		"	.pushsection __ex_table,\"a\"\n"	\
 		"	.align	3\n"				\
 		"	.long	1b, 4b\n"			\
 		"	.long	2b, 4b\n"			\
-		"	.previous\n"				\
+		"	.popsection\n"				\
 		: "=r" (err), "=&r" (v), "=&r" (a)		\
 		: "0" (err), "1" (v), "2" (a));			\
 		if (err)					\
@@ -266,18 +266,18 @@
 		"	mov	%1, %1, "NEXT_BYTE"\n"		\
 		"4:	"ins"	%1, [%2]\n"			\
 		"5:\n"						\
-		"	.section .fixup,\"ax\"\n"		\
+		"	.pushsection .fixup,\"ax\"\n"		\
 		"	.align	2\n"				\
 		"6:	mov	%0, #1\n"			\
 		"	b	5b\n"				\
-		"	.previous\n"				\
-		"	.section __ex_table,\"a\"\n"		\
+		"	.popsection\n"				\
+		"	.pushsection __ex_table,\"a\"\n"	\
 		"	.align	3\n"				\
 		"	.long	1b, 6b\n"			\
 		"	.long	2b, 6b\n"			\
 		"	.long	3b, 6b\n"			\
 		"	.long	4b, 6b\n"			\
-		"	.previous\n"				\
+		"	.popsection\n"				\
 		: "=r" (err), "=&r" (v), "=&r" (a)		\
 		: "0" (err), "1" (v), "2" (a));			\
 		if (err)					\
diff --git a/arch/arm/mm/proc-sa1100.S b/arch/arm/mm/proc-sa1100.S
index ee77002..5c47760 100644
--- a/arch/arm/mm/proc-sa1100.S
+++ b/arch/arm/mm/proc-sa1100.S
@@ -45,7 +45,7 @@
 	mcr	p15, 0, r0, c9, c0, 5		@ Allow read-buffer operations from userland
 	mov	pc, lr
 
-	.previous
+	.section .text
 
 /*
  * cpu_sa1100_proc_fin()