ARM: vmlinux.lds: Refer to start of .data using _sdata rather than _data

Use _sdata as the start of the data section, rather than _data.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/head-common.S

@@ -20,7 +20,7 @@
 __switch_data:
 	.long	__mmap_switched
 	.long	__data_loc			@ r4
-	.long	_data				@ r5
+	.long	_sdata				@ r5
 	.long	__bss_start			@ r6
 	.long	_end				@ r7
 	.long	processor_id			@ r4

arch/arm/kernel/setup.c

@@ -491,7 +491,7 @@ request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
 
 	kernel_code.start   = virt_to_phys(_text);
 	kernel_code.end     = virt_to_phys(_etext - 1);
-	kernel_data.start   = virt_to_phys(_data);
+	kernel_data.start   = virt_to_phys(_sdata);
 	kernel_data.end     = virt_to_phys(_end - 1);
 
 	for (i = 0; i < mi->nr_banks; i++) {

arch/arm/mm/init.c

@@ -277,7 +277,7 @@ void __init arm_memblock_init(struct meminfo *mi, struct machine_desc *mdesc)
 
 	/* Register the kernel text, kernel data and initrd with memblock. */
 #ifdef CONFIG_XIP_KERNEL
-	memblock_reserve(__pa(_data), _end - _data);
+	memblock_reserve(__pa(_sdata), _end - _sdata);
 #else
 	memblock_reserve(__pa(_stext), _end - _stext);
 #endif
@@ -545,7 +545,7 @@ void __init mem_init(void)
 
 			MLK_ROUNDUP(__init_begin, __init_end),
 			MLK_ROUNDUP(_text, _etext),
-			MLK_ROUNDUP(_data, _edata));
+			MLK_ROUNDUP(_sdata, _edata));
 
 #undef MLK
 #undef MLM