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 <[e-mail]>

arch/arm/include/asm/assembler.h

···
 
 #define USER(x...)				\
 9999:	x;					\
-	.section __ex_table,"a";		\
+	.pushsection __ex_table,"a";		\
 	.align	3;				\
 	.long	9999b,9001f;			\
-	.previous
+	.popsection
 
 /*
  * SMP data memory barrier
···
 	.error	"Unsupported inc macro argument"
 	.endif
 
-	.section __ex_table,"a"
+	.pushsection __ex_table,"a"
 	.align	3
 	.long	9999b, \abort
-	.previous
+	.popsection
 	.endm
 
 	.macro	usracc, instr, reg, ptr, inc, cond, rept, abort
···
 	.error	"Unsupported inc macro argument"
 	.endif
 
-	.section __ex_table,"a"
+	.pushsection __ex_table,"a"
 	.align	3
 	.long	9999b, \abort
-	.previous
+	.popsection
 	.endr
 	.endm
 

arch/arm/include/asm/futex.h

···
 	"2:	strt	%0, [%2]\n"				\
 	"	mov	%0, #0\n"				\
 	"3:\n"							\
-	"	.section __ex_table,\"a\"\n"			\
+	"	.pushsection __ex_table,\"a\"\n"		\
 	"	.align	3\n"					\
 	"	.long	1b, 4f, 2b, 4f\n"			\
-	"	.previous\n"					\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.popsection\n"					\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"4:	mov	%0, %4\n"				\
 	"	b	3b\n"					\
-	"	.previous"					\
+	"	.popsection"					\
 	: "=&r" (ret), "=&r" (oldval)				\
 	: "r" (uaddr), "r" (oparg), "Ir" (-EFAULT)		\
 	: "cc", "memory")
···
 	"	it	eq	@ explicit IT needed for the 2b label\n"
 	"2:	streqt	%2, [%3]\n"
 	"3:\n"
-	"	.section __ex_table,\"a\"\n"
+	"	.pushsection __ex_table,\"a\"\n"
 	"	.align	3\n"
 	"	.long	1b, 4f, 2b, 4f\n"
-	"	.previous\n"
-	"	.section .fixup,\"ax\"\n"
+	"	.popsection\n"
+	"	.pushsection .fixup,\"ax\"\n"
 	"4:	mov	%0, %4\n"
 	"	b	3b\n"
-	"	.previous"
+	"	.popsection"
 	: "=&r" (val)
 	: "r" (oldval), "r" (newval), "r" (uaddr), "Ir" (-EFAULT)
 	: "cc", "memory");

arch/arm/include/asm/uaccess.h

···
 	__asm__ __volatile__(					\
 	"1:	ldrbt	%1,[%2]\n"				\
 	"2:\n"							\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"	.align	2\n"					\
 	"3:	mov	%0, %3\n"				\
 	"	mov	%1, #0\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"					\
+	"	.popsection"					\
 	: "+r" (err), "=&r" (x)					\
 	: "r" (addr), "i" (-EFAULT)				\
 	: "cc")
···
 	__asm__ __volatile__(					\
 	"1:	ldrt	%1,[%2]\n"				\
 	"2:\n"							\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"	.align	2\n"					\
 	"3:	mov	%0, %3\n"				\
 	"	mov	%1, #0\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"					\
+	"	.popsection"					\
 	: "+r" (err), "=&r" (x)					\
 	: "r" (addr), "i" (-EFAULT)				\
 	: "cc")
···
 	__asm__ __volatile__(					\
 	"1:	strbt	%1,[%2]\n"				\
 	"2:\n"							\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"	.align	2\n"					\
 	"3:	mov	%0, %3\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"					\
+	"	.popsection"					\
 	: "+r" (err)						\
 	: "r" (x), "r" (__pu_addr), "i" (-EFAULT)		\
 	: "cc")
···
 	__asm__ __volatile__(					\
 	"1:	strt	%1,[%2]\n"				\
 	"2:\n"							\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"	.align	2\n"					\
 	"3:	mov	%0, %3\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"					\
+	"	.popsection"					\
 	: "+r" (err)						\
 	: "r" (x), "r" (__pu_addr), "i" (-EFAULT)		\
 	: "cc")
···
  THUMB(	"1:	strt	" __reg_oper1 ", [%1]\n"	)	\
  THUMB(	"2:	strt	" __reg_oper0 ", [%1, #4]\n"	)	\
 	"3:\n"							\
-	"	.section .fixup,\"ax\"\n"			\
+	"	.pushsection .fixup,\"ax\"\n"			\
 	"	.align	2\n"					\
 	"4:	mov	%0, %3\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"					\
+	"	.popsection"					\
 	: "+r" (err), "+r" (__pu_addr)				\
 	: "r" (x), "i" (-EFAULT)				\
 	: "cc")

arch/arm/kernel/entry-armv.S

···
 /*
  * The out of line fixup for the ldrt above.
  */
-	.section .fixup, "ax"
+	.pushsection .fixup, "ax"
 4:	mov	pc, r9
-	.previous
-	.section __ex_table,"a"
+	.popsection
+	.pushsection __ex_table,"a"
 	.long	1b, 4b
 #if __LINUX_ARM_ARCH__ >= 7
 	.long	2b, 4b
 	.long	3b, 4b
 #endif
-	.previous
+	.popsection
 
 /*
  * Check whether the instruction is a co-processor instruction.
···
 	.data
 ENTRY(fp_enter)
 	.word	no_fp
-	.previous
+	.text
 
 ENTRY(no_fp)
 	mov	pc, lr

arch/arm/kernel/ftrace.c

···
 		"    movne  %0, #2    \n"
 		"3:\n"
 
-		".section .fixup, \"ax\"\n"
+		".pushsection .fixup, \"ax\"\n"
 		"4:  mov  %0, #1  \n"
 		"    b    3b      \n"
-		".previous\n"
+		".popsection\n"
 
-		".section __ex_table, \"a\"\n"
+		".pushsection __ex_table, \"a\"\n"
 		"    .long 1b, 4b \n"
 		"    .long 2b, 4b \n"
-		".previous\n"
+		".popsection\n"
 
 		: "=r"(err), "=r"(replaced)
 		: "r"(pc), "r"(new), "r"(old), "0"(err), "1"(replaced)

arch/arm/kernel/process.c

···
  * the thread function, and r3 points to the exit function.
  */
 extern void kernel_thread_helper(void);
-asm(	".section .text\n"
+asm(	".pushsection .text\n"
 "	.align\n"
 "	.type	kernel_thread_helper, #function\n"
 "kernel_thread_helper:\n"
···
 "	mov	lr, r3\n"
 "	mov	pc, r2\n"
 "	.size	kernel_thread_helper, . - kernel_thread_helper\n"
-"	.previous");
+"	.popsection");
 
 #ifdef CONFIG_ARM_UNWIND
 extern void kernel_thread_exit(long code);
-asm(	".section .text\n"
+asm(	".pushsection .text\n"
 "	.align\n"
 "	.type	kernel_thread_exit, #function\n"
 "kernel_thread_exit:\n"
···
 "	nop\n"
 "	.fnend\n"
 "	.size	kernel_thread_exit, . - kernel_thread_exit\n"
-"	.previous");
+"	.popsection");
 #else
 #define kernel_thread_exit	do_exit
 #endif

arch/arm/lib/backtrace.S

···
 ENDPROC(__backtrace)
 ENDPROC(c_backtrace)
 		
-		.section __ex_table,"a"
+		.pushsection __ex_table,"a"
 		.align	3
 		.long	1001b, 1006b
 		.long	1002b, 1006b
 		.long	1003b, 1006b
 		.long	1004b, 1006b
-		.previous
+		.popsection
 
 #define instr r4
 #define reg   r5

arch/arm/lib/clear_user.S

···
 		ldmfd	sp!, {r1, pc}
 ENDPROC(__clear_user)
 
-		.section .fixup,"ax"
+		.pushsection .fixup,"ax"
 		.align	0
 9001:		ldmfd	sp!, {r0, pc}
-		.previous
+		.popsection
 

arch/arm/lib/copy_from_user.S

···
 
 ENDPROC(__copy_from_user)
 
-	.section .fixup,"ax"
+	.pushsection .fixup,"ax"
 	.align 0
 	copy_abort_preamble
 	ldmfd	sp!, {r1, r2}
···
 	bl	__memzero
 	ldr	r0, [sp], #4
 	copy_abort_end
-	.previous
+	.popsection
 

arch/arm/lib/copy_to_user.S

···
 
 ENDPROC(__copy_to_user)
 
-	.section .fixup,"ax"
+	.pushsection .fixup,"ax"
 	.align 0
 	copy_abort_preamble
 	ldmfd	sp!, {r1, r2, r3}
 	sub	r0, r0, r1
 	rsb	r0, r0, r2
 	copy_abort_end
-	.previous
+	.popsection
 

arch/arm/lib/csumpartialcopyuser.S

···
  * so properly, we would have to add in whatever registers were loaded before
  * the fault, which, with the current asm above is not predictable.
  */
-		.section .fixup,"ax"
+		.pushsection .fixup,"ax"
 		.align	4
 9001:		mov	r4, #-EFAULT
 		ldr	r5, [fp, #4]		@ *err_ptr
···
 		strneb	r0, [r1], #1
 		bne	9002b
 		load_regs
-		.previous
+		.popsection

arch/arm/lib/getuser.S

···
 	mov	pc, lr
 ENDPROC(__get_user_bad)
 
-.section __ex_table, "a"
+.pushsection __ex_table, "a"
 	.long	1b, __get_user_bad
 	.long	2b, __get_user_bad
 	.long	3b, __get_user_bad
 	.long	4b, __get_user_bad
-.previous
+.popsection

arch/arm/lib/putuser.S

···
 	mov	pc, lr
 ENDPROC(__put_user_bad)
 
-.section __ex_table, "a"
+.pushsection __ex_table, "a"
 	.long	1b, __put_user_bad
 	.long	2b, __put_user_bad
 	.long	3b, __put_user_bad
 	.long	4b, __put_user_bad
 	.long	5b, __put_user_bad
 	.long	6b, __put_user_bad
-.previous
+.popsection

arch/arm/lib/strncpy_from_user.S

···
 	mov	pc, lr
 ENDPROC(__strncpy_from_user)
 
-	.section .fixup,"ax"
+	.pushsection .fixup,"ax"
 	.align	0
 9001:	mov	r3, #0
 	strb	r3, [r0, #0]	@ null terminate
 	mov	r0, #-EFAULT
 	mov	pc, lr
-	.previous
+	.popsection
 

arch/arm/lib/strnlen_user.S

···
 	mov	pc, lr
 ENDPROC(__strnlen_user)
 
-	.section .fixup,"ax"
+	.pushsection .fixup,"ax"
 	.align	0
 9001:	mov	r0, #0
 	mov	pc, lr
-	.previous
+	.popsection

arch/arm/lib/uaccess.S

···
 		b	.Lc2u_finished
 ENDPROC(__copy_to_user)
 
-		.section .fixup,"ax"
+		.pushsection .fixup,"ax"
 		.align	0
 9001:		ldmfd	sp!, {r0, r4 - r7, pc}
-		.previous
+		.popsection
 
 /* Prototype: unsigned long __copy_from_user(void *to,const void *from,unsigned long n);
  * Purpose  : copy a block from user memory to kernel memory
···
 		b	.Lcfu_finished
 ENDPROC(__copy_from_user)
 
-		.section .fixup,"ax"
+		.pushsection .fixup,"ax"
 		.align	0
 		/*
 		 * We took an exception.  r0 contains a pointer to
···
 		blne	__memzero
 		mov	r0, r4
 		ldmfd	sp!, {r4 - r7, pc}
-		.previous
+		.popsection
 

arch/arm/mm/alignment.c

···
  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))
 
···
 		"	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)					\
···
 		"	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)					\

arch/arm/mm/proc-sa1100.S

···
 	mcr	p15, 0, r0, c9, c0, 5		@ Allow read-buffer operations from userland
 	mov	pc, lr
 
-	.previous
+	.section .text
 
 /*
  * cpu_sa1100_proc_fin()

arch/arm/nwfpe/entry.S

···
 	@ to fault.  Emit the appropriate exception gunk to fix things up.
 	@ ??? For some reason, faults can happen at .Lx2 even with a
 	@ plain LDR instruction.  Weird, but it seems harmless.
-	.section .fixup,"ax"
+	.pushsection .fixup,"ax"
 	.align	2
 .Lfix:	mov	pc, r9			@ let the user eat segfaults
-	.previous
+	.popsection
 
-	.section __ex_table,"a"
+	.pushsection __ex_table,"a"
 	.align	3
 	.long	.Lx1, .Lfix
-	.previous
+	.popsection