percpu.h (1354B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_IA64_PERCPU_H 3#define _ASM_IA64_PERCPU_H 4 5/* 6 * Copyright (C) 2002-2003 Hewlett-Packard Co 7 * David Mosberger-Tang <davidm@hpl.hp.com> 8 */ 9 10#ifdef __ASSEMBLY__ 11# define THIS_CPU(var) (var) /* use this to mark accesses to per-CPU variables... */ 12#else /* !__ASSEMBLY__ */ 13 14 15#include <linux/threads.h> 16 17#ifdef CONFIG_SMP 18 19#ifdef HAVE_MODEL_SMALL_ATTRIBUTE 20# define PER_CPU_ATTRIBUTES __attribute__((__model__ (__small__))) 21#endif 22 23#define __my_cpu_offset __ia64_per_cpu_var(local_per_cpu_offset) 24 25extern void *per_cpu_init(void); 26 27#else /* ! SMP */ 28 29#define per_cpu_init() (__phys_per_cpu_start) 30 31#endif /* SMP */ 32 33#define PER_CPU_BASE_SECTION ".data..percpu" 34 35/* 36 * Be extremely careful when taking the address of this variable! Due to virtual 37 * remapping, it is different from the canonical address returned by this_cpu_ptr(&var)! 38 * On the positive side, using __ia64_per_cpu_var() instead of this_cpu_ptr() is slightly 39 * more efficient. 40 */ 41#define __ia64_per_cpu_var(var) (*({ \ 42 __verify_pcpu_ptr(&(var)); \ 43 ((typeof(var) __kernel __force *)&(var)); \ 44})) 45 46#include <asm-generic/percpu.h> 47 48/* Equal to __per_cpu_offset[smp_processor_id()], but faster to access: */ 49DECLARE_PER_CPU(unsigned long, local_per_cpu_offset); 50 51#endif /* !__ASSEMBLY__ */ 52 53#endif /* _ASM_IA64_PERCPU_H */