Linux Kernel  3.7.1
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sections.h
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1 /*
2  * Copyright 2010 Tilera Corporation. All Rights Reserved.
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation, version 2.
7  *
8  * This program is distributed in the hope that it will be useful, but
9  * WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11  * NON INFRINGEMENT. See the GNU General Public License for
12  * more details.
13  */
14 
15 #ifndef _ASM_TILE_SECTIONS_H
16 #define _ASM_TILE_SECTIONS_H
17 
18 #define arch_is_kernel_data arch_is_kernel_data
19 
20 #include <asm-generic/sections.h>
21 
22 /* Text and data are at different areas in the kernel VA space. */
23 extern char _sinitdata[], _einitdata[];
24 
25 /* Write-once data is writable only till the end of initialization. */
26 extern char __w1data_begin[], __w1data_end[];
27 
28 
29 /* Not exactly sections, but PC comparison points in the code. */
30 extern char __rt_sigreturn[], __rt_sigreturn_end[];
31 #ifndef __tilegx__
32 extern char sys_cmpxchg[], __sys_cmpxchg_end[];
33 extern char __sys_cmpxchg_grab_lock[];
35 #endif
36 
37 /* Handle the discontiguity between _sdata and _stext. */
38 static inline int arch_is_kernel_data(unsigned long addr)
39 {
40  return addr >= (unsigned long)_sdata &&
41  addr < (unsigned long)_end;
42 }
43 
44 #endif /* _ASM_TILE_SECTIONS_H */