[PATCH] x86_64: Only use asm/sections.h to declare section symbols

Adding __initdata_* to asm-generic/sections.h
Replaces a lot of open coded externs in arch/x86_64/*
I had to change __bss_end to __bss_stop to match the other architectures.

Signed-off-by: Andi Kleen <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

arch/x86_64/kernel/e820.c

···
 #include <asm/e820.h>
 #include <asm/proto.h>
 #include <asm/bootsetup.h>
-
-extern char _end[];
+#include <asm/sections.h>
 
 /* 
  * PFN of last memory page.

arch/x86_64/kernel/head64.c

···
 #include <asm/setup.h>
 #include <asm/desc.h>
 #include <asm/pgtable.h>
+#include <asm/sections.h>
 
 /* Don't add a printk in there. printk relies on the PDA which is not initialized 
    yet. */
 static void __init clear_bss(void)
 {
-	extern char __bss_start[], __bss_end[];
 	memset(__bss_start, 0,
-	       (unsigned long) __bss_end - (unsigned long) __bss_start);
+	       (unsigned long) __bss_stop - (unsigned long) __bss_start);
 }
 
 #define NEW_CL_POINTER		0x228	/* Relative to real mode data */
···
 	boot_cpu_data.x86_model = (eax >> 4) & 0xf;
 	boot_cpu_data.x86_mask = eax & 0xf;
 }
-
-extern char _end[];
 
 void __init x86_64_start_kernel(char * real_mode_data)
 {

arch/x86_64/kernel/setup.c

···
 #include <asm/setup.h>
 #include <asm/mach_apic.h>
 #include <asm/numa.h>
+#include <asm/sections.h>
 
 /*
  * Machine setup..
···
 struct e820map e820;
 
 extern int root_mountflags;
-extern char _text, _etext, _edata, _end;
 
 char command_line[COMMAND_LINE_SIZE];
 

arch/x86_64/kernel/vmlinux.lds.S

···
 	*(.bss.page_aligned)	
 	*(.bss)
 	}
-  __bss_end = .;
+  __bss_stop = .;
 
   . = ALIGN(PAGE_SIZE);
   . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);

arch/x86_64/mm/init.c

···
 #include <asm/mmu_context.h>
 #include <asm/proto.h>
 #include <asm/smp.h>
+#include <asm/sections.h>
 
 #ifndef Dprintk
 #define Dprintk(x...)
···
 #ifdef CONFIG_GART_IOMMU
 extern int swiotlb;
 #endif
-
-extern char _stext[];
 
 static unsigned long dma_reserve __initdata;
 
···
 }
 
 /* References to section boundaries */
-
-extern char _text, _etext, _edata, __bss_start, _end[];
-extern char __init_begin, __init_end;
 
 int after_bootmem;
 
···
 #endif
 }
 
-extern char __initdata_begin[], __initdata_end[];
-
 void free_initmem(void)
 {
 	unsigned long addr;
···
 		totalram_pages++;
 	}
 	memset(__initdata_begin, 0xba, __initdata_end - __initdata_begin);
-	printk ("Freeing unused kernel memory: %luk freed\n", (&__init_end - &__init_begin) >> 10);
+	printk ("Freeing unused kernel memory: %luk freed\n", (__init_end - __init_begin) >> 10);
 }
 
 #ifdef CONFIG_BLK_DEV_INITRD

include/asm-generic/sections.h

···
 extern char _end[];
 extern char __per_cpu_start[], __per_cpu_end[];
 extern char __kprobes_text_start[], __kprobes_text_end[];
+extern char __initdata_begin[], __initdata_end[];
 
 #endif /* _ASM_GENERIC_SECTIONS_H_ */