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kernel/linux-rt-4.4.41/arch/tile/include/asm/sections.h 1.48 KB
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  /*
   * Copyright 2010 Tilera Corporation. All Rights Reserved.
   *
   *   This program is free software; you can redistribute it and/or
   *   modify it under the terms of the GNU General Public License
   *   as published by the Free Software Foundation, version 2.
   *
   *   This program is distributed in the hope that it will be useful, but
   *   WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
   *   NON INFRINGEMENT.  See the GNU General Public License for
   *   more details.
   */
  
  #ifndef _ASM_TILE_SECTIONS_H
  #define _ASM_TILE_SECTIONS_H
  
  #define arch_is_kernel_data arch_is_kernel_data
  
  #include <asm-generic/sections.h>
  
  /* Write-once data is writable only till the end of initialization. */
  extern char __w1data_begin[], __w1data_end[];
  
  extern char vdso_start[], vdso_end[];
  #ifdef CONFIG_COMPAT
  extern char vdso32_start[], vdso32_end[];
  #endif
  
  /* Not exactly sections, but PC comparison points in the code. */
  extern char __rt_sigreturn[], __rt_sigreturn_end[];
  #ifdef __tilegx__
  extern char __start_unalign_asm_code[], __end_unalign_asm_code[];
  #else
  extern char sys_cmpxchg[], __sys_cmpxchg_end[];
  extern char __sys_cmpxchg_grab_lock[];
  extern char __start_atomic_asm_code[], __end_atomic_asm_code[];
  #endif
  
  /* Handle the discontiguity between _sdata and _text. */
  static inline int arch_is_kernel_data(unsigned long addr)
  {
  	return addr >= (unsigned long)_sdata &&
  		addr < (unsigned long)_end;
  }
  
  #endif /* _ASM_TILE_SECTIONS_H */