[ARM] use asm/sections.h

Update to use the asm/sections.h header rather than declaring these
symbols ourselves.  Change __data_start to _data to conform with the
naming found within asm/sections.h.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/head-common.S

@@ -18,7 +18,7 @@
 __switch_data:
 	.long	__mmap_switched
 	.long	__data_loc			@ r4
-	.long	__data_start			@ r5
+	.long	_data				@ r5
 	.long	__bss_start			@ r6
 	.long	_end				@ r7
 	.long	processor_id			@ r4

arch/arm/kernel/module.c

@@ -21,6 +21,7 @@
 #include <linux/string.h>
 
 #include <asm/pgtable.h>
+#include <asm/sections.h>
 
 #ifdef CONFIG_XIP_KERNEL
 /*
@@ -29,9 +30,8 @@
  * MODULES_VADDR is redefined here and not in asm/memory.h to avoid
  * recompiling the whole kernel when CONFIG_XIP_KERNEL is turned on/off.
  */
-extern void _etext;
 #undef MODULES_VADDR
-#define MODULES_VADDR	(((unsigned long)&_etext + ~PGDIR_MASK) & PGDIR_MASK)
+#define MODULES_VADDR	(((unsigned long)_etext + ~PGDIR_MASK) & PGDIR_MASK)
 #endif
 
 #ifdef CONFIG_MMU

arch/arm/kernel/setup.c

@@ -29,6 +29,7 @@
 #include <asm/cputype.h>
 #include <asm/elf.h>
 #include <asm/procinfo.h>
+#include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/mach-types.h>
 #include <asm/cacheflush.h>
@@ -61,7 +62,6 @@ __setup("fpe=", fpe_setup);
 
 extern void paging_init(struct machine_desc *desc);
 extern void reboot_setup(char *str);
-extern void _text, _etext, __data_start, _edata, _end;
 
 unsigned int processor_id;
 EXPORT_SYMBOL(processor_id);
@@ -484,10 +484,10 @@ request_standard_resources(struct meminfo *mi, struct machine_desc *mdesc)
 	struct resource *res;
 	int i;
 
-	kernel_code.start   = virt_to_phys(&_text);
-	kernel_code.end     = virt_to_phys(&_etext - 1);
-	kernel_data.start   = virt_to_phys(&__data_start);
-	kernel_data.end     = virt_to_phys(&_end - 1);
+	kernel_code.start   = virt_to_phys(_text);
+	kernel_code.end     = virt_to_phys(_etext - 1);
+	kernel_data.start   = virt_to_phys(_data);
+	kernel_data.end     = virt_to_phys(_end - 1);
 
 	for (i = 0; i < mi->nr_banks; i++) {
 		if (mi->bank[i].size == 0)
@@ -715,10 +715,10 @@ void __init setup_arch(char **cmdline_p)
 		parse_tags(tags);
 	}
 
-	init_mm.start_code = (unsigned long) &_text;
-	init_mm.end_code   = (unsigned long) &_etext;
-	init_mm.end_data   = (unsigned long) &_edata;
-	init_mm.brk	   = (unsigned long) &_end;
+	init_mm.start_code = (unsigned long) _text;
+	init_mm.end_code   = (unsigned long) _etext;
+	init_mm.end_data   = (unsigned long) _edata;
+	init_mm.brk	   = (unsigned long) _end;
 
 	memcpy(boot_command_line, from, COMMAND_LINE_SIZE);
 	boot_command_line[COMMAND_LINE_SIZE-1] = '\0';

arch/arm/kernel/vmlinux.lds.S

@@ -119,7 +119,7 @@ SECTIONS
 #endif
 
 	.data : AT(__data_loc) {
-		__data_start = .;	/* address in memory */
+		_data = .;		/* address in memory */
 
 		/*
 		 * first, the init task union, aligned

arch/arm/mm/init.c

@@ -17,6 +17,7 @@
 #include <linux/initrd.h>
 
 #include <asm/mach-types.h>
+#include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/sizes.h>
 #include <asm/tlb.h>
@@ -129,7 +130,7 @@ find_bootmap_pfn(int node, struct meminfo *mi, unsigned int bootmap_pages)
 {
 	unsigned int start_pfn, i, bootmap_pfn;
 
-	start_pfn   = PAGE_ALIGN(__pa(&_end)) >> PAGE_SHIFT;
+	start_pfn   = PAGE_ALIGN(__pa(_end)) >> PAGE_SHIFT;
 	bootmap_pfn = 0;
 
 	for_each_nodebank(i, mi, node) {
@@ -515,9 +516,9 @@ void __init mem_init(void)
 	}
 	printk(" = %luMB total\n", num_physpages >> (20 - PAGE_SHIFT));
 
-	codesize = &_etext - &_text;
-	datasize = &_end - &__data_start;
-	initsize = &__init_end - &__init_begin;
+	codesize = _etext - _text;
+	datasize = _end - _data;
+	initsize = __init_end - __init_begin;
 
 	printk(KERN_NOTICE "Memory: %luKB available (%dK code, "
 		"%dK data, %dK init)\n",
@@ -538,8 +539,8 @@ void __init mem_init(void)
 void free_initmem(void)
 {
 	if (!machine_is_integrator() && !machine_is_cintegrator())
-		totalram_pages += free_area(__phys_to_pfn(__pa(&__init_begin)),
-					    __phys_to_pfn(__pa(&__init_end)),
+		totalram_pages += free_area(__phys_to_pfn(__pa(__init_begin)),
+					    __phys_to_pfn(__pa(__init_end)),
 					    "init");
 }
 

arch/arm/mm/mm.h

@@ -34,5 +34,3 @@ struct pglist_data;
 void __init create_mapping(struct map_desc *md);
 void __init bootmem_init(void);
 void reserve_node_zero(struct pglist_data *pgdat);
-
-extern void _text, _stext, _etext, __data_start, _end, __init_begin, __init_end;

arch/arm/mm/mmu.c

@@ -17,6 +17,7 @@
 
 #include <asm/cputype.h>
 #include <asm/mach-types.h>
+#include <asm/sections.h>
 #include <asm/setup.h>
 #include <asm/sizes.h>
 #include <asm/tlb.h>
@@ -730,7 +731,7 @@ static inline void prepare_page_table(void)
 
 #ifdef CONFIG_XIP_KERNEL
 	/* The XIP kernel is mapped in the module area -- skip over it */
-	addr = ((unsigned long)&_etext + PGDIR_SIZE - 1) & PGDIR_MASK;
+	addr = ((unsigned long)_etext + PGDIR_SIZE - 1) & PGDIR_MASK;
 #endif
 	for ( ; addr < PAGE_OFFSET; addr += PGDIR_SIZE)
 		pmd_clear(pmd_off_k(addr));
@@ -756,10 +757,10 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 	 * Note that this can only be in node 0.
 	 */
 #ifdef CONFIG_XIP_KERNEL
-	reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
+	reserve_bootmem_node(pgdat, __pa(_data), _end - _data,
 			BOOTMEM_DEFAULT);
 #else
-	reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
+	reserve_bootmem_node(pgdat, __pa(_stext), _end - _stext,
 			BOOTMEM_DEFAULT);
 #endif
 
@@ -838,7 +839,7 @@ static void __init devicemaps_init(struct machine_desc *mdesc)
 #ifdef CONFIG_XIP_KERNEL
 	map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & SECTION_MASK);
 	map.virtual = MODULES_VADDR;
-	map.length = ((unsigned long)&_etext - map.virtual + ~SECTION_MASK) & SECTION_MASK;
+	map.length = ((unsigned long)_etext - map.virtual + ~SECTION_MASK) & SECTION_MASK;
 	map.type = MT_ROM;
 	create_mapping(&map);
 #endif

arch/arm/mm/nommu.c

@@ -10,6 +10,7 @@
 #include <linux/io.h>
 
 #include <asm/cacheflush.h>
+#include <asm/sections.h>
 #include <asm/page.h>
 #include <asm/mach/arch.h>
 
@@ -25,10 +26,10 @@ void __init reserve_node_zero(pg_data_t *pgdat)
 	 * Note that this can only be in node 0.
 	 */
 #ifdef CONFIG_XIP_KERNEL
-	reserve_bootmem_node(pgdat, __pa(&__data_start), &_end - &__data_start,
+	reserve_bootmem_node(pgdat, __pa(_data), _end - _data,
 			BOOTMEM_DEFAULT);
 #else
-	reserve_bootmem_node(pgdat, __pa(&_stext), &_end - &_stext,
+	reserve_bootmem_node(pgdat, __pa(_stext), _end - _stext,
 			BOOTMEM_DEFAULT);
 #endif