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tile: normalize global variables exported by vmlinux.lds 

Normalize global variables exported by vmlinux.lds to conform usage
guidelines from include/asm-generic/sections.h.

1) Use _text to mark the start of the kernel image including the head
text, and _stext to mark the start of the .text section.
2) Export mandatory global variables __init_begin and __init_end.

Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Acked-by: Chris Metcalf <cmetcalf@tilera.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Wen Congyang <wency@cn.fujitsu.com>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jiang Liu 2013-07-03 15:03:39 -07:00 committed by Linus Torvalds
parent ae49b83dca
commit 40a3b8df7b
4 changed files with 7 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/tile/include/asm/sections.h
View File

@ -34,7 +34,7 @@ extern char __sys_cmpxchg_grab_lock[];
extern char __start_atomic_asm_code[], __end_atomic_asm_code[]; extern char __start_atomic_asm_code[], __end_atomic_asm_code[];
#endif #endif
/* Handle the discontiguity between _sdata and _stext. */ /* Handle the discontiguity between _sdata and _text. */
static inline int arch_is_kernel_data(unsigned long addr) static inline int arch_is_kernel_data(unsigned long addr)
{ {
return addr >= (unsigned long)_sdata && return addr >= (unsigned long)_sdata &&

4
arch/tile/kernel/setup.c
View File

@ -307,8 +307,8 @@ static void __cpuinit store_permanent_mappings(void)
hv_store_mapping(addr, pages << PAGE_SHIFT, pa); hv_store_mapping(addr, pages << PAGE_SHIFT, pa);
} }
hv_store_mapping((HV_VirtAddr)_stext, hv_store_mapping((HV_VirtAddr)_text,
(uint32_t)(_einittext - _stext), 0); (uint32_t)(_einittext - _text), 0);
} }
/* /*

4
arch/tile/kernel/vmlinux.lds.S
View File

@ -27,7 +27,6 @@ SECTIONS
.intrpt1 (LOAD_OFFSET) : AT ( 0 ) /* put at the start of physical memory */ .intrpt1 (LOAD_OFFSET) : AT ( 0 ) /* put at the start of physical memory */
{ {
_text = .; _text = .;
_stext = .;
*(.intrpt1) *(.intrpt1)
} :intrpt1 =0 } :intrpt1 =0
@ -36,6 +35,7 @@ SECTIONS
/* Now the real code */ /* Now the real code */
. = ALIGN(0x20000); . = ALIGN(0x20000);
_stext = .;
.text : AT (ADDR(.text) - LOAD_OFFSET) { .text : AT (ADDR(.text) - LOAD_OFFSET) {
HEAD_TEXT HEAD_TEXT
SCHED_TEXT SCHED_TEXT
@ -58,11 +58,13 @@ SECTIONS
#define LOAD_OFFSET PAGE_OFFSET #define LOAD_OFFSET PAGE_OFFSET
. = ALIGN(PAGE_SIZE); . = ALIGN(PAGE_SIZE);
__init_begin = .;
VMLINUX_SYMBOL(_sinitdata) = .; VMLINUX_SYMBOL(_sinitdata) = .;
INIT_DATA_SECTION(16) :data =0 INIT_DATA_SECTION(16) :data =0
PERCPU_SECTION(L2_CACHE_BYTES) PERCPU_SECTION(L2_CACHE_BYTES)
. = ALIGN(PAGE_SIZE); . = ALIGN(PAGE_SIZE);
VMLINUX_SYMBOL(_einitdata) = .; VMLINUX_SYMBOL(_einitdata) = .;
__init_end = .;
_sdata = .; /* Start of data section */ _sdata = .; /* Start of data section */

2
arch/tile/mm/init.c
View File

@ -562,7 +562,7 @@ static void __init kernel_physical_mapping_init(pgd_t *pgd_base)
prot = ktext_set_nocache(prot); prot = ktext_set_nocache(prot);
} }
BUG_ON(address != (unsigned long)_stext); BUG_ON(address != (unsigned long)_text);
pte = NULL; pte = NULL;
for (; address < (unsigned long)_einittext; for (; address < (unsigned long)_einittext;
pfn++, address += PAGE_SIZE) { pfn++, address += PAGE_SIZE) {