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kernel/linux-rt-4.4.41/arch/ia64/include/asm/percpu.h 1.33 KB
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  #ifndef _ASM_IA64_PERCPU_H
  #define _ASM_IA64_PERCPU_H
  
  /*
   * Copyright (C) 2002-2003 Hewlett-Packard Co
   *	David Mosberger-Tang <davidm@hpl.hp.com>
   */
  
  #define PERCPU_ENOUGH_ROOM PERCPU_PAGE_SIZE
  
  #ifdef __ASSEMBLY__
  # define THIS_CPU(var)	(var)  /* use this to mark accesses to per-CPU variables... */
  #else /* !__ASSEMBLY__ */
  
  
  #include <linux/threads.h>
  
  #ifdef CONFIG_SMP
  
  #ifdef HAVE_MODEL_SMALL_ATTRIBUTE
  # define PER_CPU_ATTRIBUTES	__attribute__((__model__ (__small__)))
  #endif
  
  #define __my_cpu_offset	__ia64_per_cpu_var(local_per_cpu_offset)
  
  extern void *per_cpu_init(void);
  
  #else /* ! SMP */
  
  #define per_cpu_init()				(__phys_per_cpu_start)
  
  #endif	/* SMP */
  
  #define PER_CPU_BASE_SECTION ".data..percpu"
  
  /*
   * Be extremely careful when taking the address of this variable!  Due to virtual
   * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)!
   * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly
   * more efficient.
   */
  #define __ia64_per_cpu_var(var) (*({					\
  	__verify_pcpu_ptr(&(var));					\
  	((typeof(var) __kernel __force *)&(var));			\
  }))
  
  #include <asm-generic/percpu.h>
  
  /* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */
  DECLARE_PER_CPU(unsigned long, local_per_cpu_offset);
  
  #endif /* !__ASSEMBLY__ */
  
  #endif /* _ASM_IA64_PERCPU_H */