[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 <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
index ab3f87a..17579a1 100644
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -23,8 +23,7 @@
#include <asm/e820.h>
#include <asm/proto.h>
#include <asm/bootsetup.h>
-
-extern char _end[];
+#include <asm/sections.h>
/*
* PFN of last memory page.
diff --git a/arch/x86_64/kernel/head64.c b/arch/x86_64/kernel/head64.c
index e0f12d4..b675c5a 100644
--- a/arch/x86_64/kernel/head64.c
+++ b/arch/x86_64/kernel/head64.c
@@ -20,14 +20,14 @@
#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 */
@@ -76,8 +76,6 @@
boot_cpu_data.x86_mask = eax & 0xf;
}
-extern char _end[];
-
void __init x86_64_start_kernel(char * real_mode_data)
{
char *s;
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index f76f374..2ad3556 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -60,6 +60,7 @@
#include <asm/setup.h>
#include <asm/mach_apic.h>
#include <asm/numa.h>
+#include <asm/sections.h>
/*
* Machine setup..
@@ -103,7 +104,6 @@
struct e820map e820;
extern int root_mountflags;
-extern char _text, _etext, _edata, _end;
char command_line[COMMAND_LINE_SIZE];
diff --git a/arch/x86_64/kernel/vmlinux.lds.S b/arch/x86_64/kernel/vmlinux.lds.S
index 6dd642c..58b1921 100644
--- a/arch/x86_64/kernel/vmlinux.lds.S
+++ b/arch/x86_64/kernel/vmlinux.lds.S
@@ -50,7 +50,7 @@
*(.bss.page_aligned)
*(.bss)
}
- __bss_end = .;
+ __bss_stop = .;
. = ALIGN(PAGE_SIZE);
. = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index be483a1..489e18d 100644
--- a/arch/x86_64/mm/init.c
+++ b/arch/x86_64/mm/init.c
@@ -36,6 +36,7 @@
#include <asm/mmu_context.h>
#include <asm/proto.h>
#include <asm/smp.h>
+#include <asm/sections.h>
#ifndef Dprintk
#define Dprintk(x...)
@@ -45,8 +46,6 @@
extern int swiotlb;
#endif
-extern char _stext[];
-
static unsigned long dma_reserve __initdata;
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
@@ -88,9 +87,6 @@
/* References to section boundaries */
-extern char _text, _etext, _edata, __bss_start, _end[];
-extern char __init_begin, __init_end;
-
int after_bootmem;
static void *spp_getpage(void)
@@ -491,8 +487,6 @@
#endif
}
-extern char __initdata_begin[], __initdata_end[];
-
void free_initmem(void)
{
unsigned long addr;
@@ -506,7 +500,7 @@
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
diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h
index 886dbd1..0b49f9e 100644
--- a/include/asm-generic/sections.h
+++ b/include/asm-generic/sections.h
@@ -13,5 +13,6 @@
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_ */