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Edit File: percpu.h

/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_GENERIC_PERCPU_H_ #define _ASM_GENERIC_PERCPU_H_ #include <linux/compiler.h> #include <linux/threads.h> #include <linux/percpu-defs.h> #ifdef CONFIG_SMP /* * per_cpu_offset() is the offset that has to be added to a * percpu variable to get to the instance for a certain processor. * * Most arches use the __per_cpu_offset array for those offsets but * some arches have their own ways of determining the offset (x86_64, s390). */ #ifndef __per_cpu_offset extern unsigned long __per_cpu_offset[NR_CPUS]; #define per_cpu_offset(x) (__per_cpu_offset[x]) #endif /* * Determine the offset for the currently active processor. * An arch may define __my_cpu_offset to provide a more effective * means of obtaining the offset to the per cpu variables of the * current processor. */ #ifndef __my_cpu_offset #define __my_cpu_offset per_cpu_offset(raw_smp_processor_id()) #endif #ifdef CONFIG_DEBUG_PREEMPT #define my_cpu_offset per_cpu_offset(smp_processor_id()) #else #define my_cpu_offset __my_cpu_offset #endif /* * Arch may define arch_raw_cpu_ptr() to provide more efficient address * translations for raw_cpu_ptr(). */ #ifndef arch_raw_cpu_ptr #define arch_raw_cpu_ptr(ptr) SHIFT_PERCPU_PTR(ptr, __my_cpu_offset) #endif #ifdef CONFIG_HAVE_SETUP_PER_CPU_AREA extern void setup_per_cpu_areas(void); #endif #endif /* SMP */ #ifndef PER_CPU_BASE_SECTION #ifdef CONFIG_SMP #define PER_CPU_BASE_SECTION ".data..percpu" #else #define PER_CPU_BASE_SECTION ".data" #endif #endif #ifndef PER_CPU_ATTRIBUTES #define PER_CPU_ATTRIBUTES #endif #define raw_cpu_generic_read(pcp) \ ({ \ *raw_cpu_ptr(&(pcp)); \ }) #define raw_cpu_generic_to_op(pcp, val, op) \ do { \ *raw_cpu_ptr(&(pcp)) op val; \ } while (0) #define raw_cpu_generic_add_return(pcp, val) \ ({ \ typeof(pcp) *__p = raw_cpu_ptr(&(pcp)); \ \ *__p += val; \ *__p; \ }) #define raw_cpu_generic_xchg(pcp, nval) \ ({ \ typeof(pcp) *__p = raw_cpu_ptr(&(pcp)); \ typeof(pcp) __ret; \ __ret = *__p; \ *__p = nval; \ __ret; \ }) #define raw_cpu_generic_cmpxchg(pcp, oval, nval) \ ({ \ typeof(pcp) *__p = raw_cpu_ptr(&(pcp)); \ typeof(pcp) __ret; \ __ret = *__p; \ if (__ret == (oval)) \ *__p = nval; \ __ret; \ }) #define raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ ({ \ typeof(pcp1) *__p1 = raw_cpu_ptr(&(pcp1)); \ typeof(pcp2) *__p2 = raw_cpu_ptr(&(pcp2)); \ int __ret = 0; \ if (*__p1 == (oval1) && *__p2 == (oval2)) { \ *__p1 = nval1; \ *__p2 = nval2; \ __ret = 1; \ } \ (__ret); \ }) #define __this_cpu_generic_read_nopreempt(pcp) \ ({ \ typeof(pcp) ___ret; \ preempt_disable_notrace(); \ ___ret = READ_ONCE(*raw_cpu_ptr(&(pcp))); \ preempt_enable_notrace(); \ ___ret; \ }) #define __this_cpu_generic_read_noirq(pcp) \ ({ \ typeof(pcp) ___ret; \ unsigned long ___flags; \ raw_local_irq_save(___flags); \ ___ret = raw_cpu_generic_read(pcp); \ raw_local_irq_restore(___flags); \ ___ret; \ }) #define this_cpu_generic_read(pcp) \ ({ \ typeof(pcp) __ret; \ if (__native_word(pcp)) \ __ret = __this_cpu_generic_read_nopreempt(pcp); \ else \ __ret = __this_cpu_generic_read_noirq(pcp); \ __ret; \ }) #define this_cpu_generic_to_op(pcp, val, op) \ do { \ unsigned long __flags; \ raw_local_irq_save(__flags); \ raw_cpu_generic_to_op(pcp, val, op); \ raw_local_irq_restore(__flags); \ } while (0) #define this_cpu_generic_add_return(pcp, val) \ ({ \ typeof(pcp) __ret; \ unsigned long __flags; \ raw_local_irq_save(__flags); \ __ret = raw_cpu_generic_add_return(pcp, val); \ raw_local_irq_restore(__flags); \ __ret; \ }) #define this_cpu_generic_xchg(pcp, nval) \ ({ \ typeof(pcp) __ret; \ unsigned long __flags; \ raw_local_irq_save(__flags); \ __ret = raw_cpu_generic_xchg(pcp, nval); \ raw_local_irq_restore(__flags); \ __ret; \ }) #define this_cpu_generic_cmpxchg(pcp, oval, nval) \ ({ \ typeof(pcp) __ret; \ unsigned long __flags; \ raw_local_irq_save(__flags); \ __ret = raw_cpu_generic_cmpxchg(pcp, oval, nval); \ raw_local_irq_restore(__flags); \ __ret; \ }) #define this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) \ ({ \ int __ret; \ unsigned long __flags; \ raw_local_irq_save(__flags); \ __ret = raw_cpu_generic_cmpxchg_double(pcp1, pcp2, \ oval1, oval2, nval1, nval2); \ raw_local_irq_restore(__flags); \ __ret; \ }) #ifndef raw_cpu_read_1 #define raw_cpu_read_1(pcp) raw_cpu_generic_read(pcp) #endif #ifndef raw_cpu_read_2 #define raw_cpu_read_2(pcp) raw_cpu_generic_read(pcp) #endif #ifndef raw_cpu_read_4 #define raw_cpu_read_4(pcp) raw_cpu_generic_read(pcp) #endif #ifndef raw_cpu_read_8 #define raw_cpu_read_8(pcp) raw_cpu_generic_read(pcp) #endif #ifndef raw_cpu_write_1 #define raw_cpu_write_1(pcp, val) raw_cpu_generic_to_op(pcp, val, =) #endif #ifndef raw_cpu_write_2 #define raw_cpu_write_2(pcp, val) raw_cpu_generic_to_op(pcp, val, =) #endif #ifndef raw_cpu_write_4 #define raw_cpu_write_4(pcp, val) raw_cpu_generic_to_op(pcp, val, =) #endif #ifndef raw_cpu_write_8 #define raw_cpu_write_8(pcp, val) raw_cpu_generic_to_op(pcp, val, =) #endif #ifndef raw_cpu_add_1 #define raw_cpu_add_1(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) #endif #ifndef raw_cpu_add_2 #define raw_cpu_add_2(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) #endif #ifndef raw_cpu_add_4 #define raw_cpu_add_4(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) #endif #ifndef raw_cpu_add_8 #define raw_cpu_add_8(pcp, val) raw_cpu_generic_to_op(pcp, val, +=) #endif #ifndef raw_cpu_and_1 #define raw_cpu_and_1(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) #endif #ifndef raw_cpu_and_2 #define raw_cpu_and_2(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) #endif #ifndef raw_cpu_and_4 #define raw_cpu_and_4(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) #endif #ifndef raw_cpu_and_8 #define raw_cpu_and_8(pcp, val) raw_cpu_generic_to_op(pcp, val, &=) #endif #ifndef raw_cpu_or_1 #define raw_cpu_or_1(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) #endif #ifndef raw_cpu_or_2 #define raw_cpu_or_2(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) #endif #ifndef raw_cpu_or_4 #define raw_cpu_or_4(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) #endif #ifndef raw_cpu_or_8 #define raw_cpu_or_8(pcp, val) raw_cpu_generic_to_op(pcp, val, |=) #endif #ifndef raw_cpu_add_return_1 #define raw_cpu_add_return_1(pcp, val) raw_cpu_generic_add_return(pcp, val) #endif #ifndef raw_cpu_add_return_2 #define raw_cpu_add_return_2(pcp, val) raw_cpu_generic_add_return(pcp, val) #endif #ifndef raw_cpu_add_return_4 #define raw_cpu_add_return_4(pcp, val) raw_cpu_generic_add_return(pcp, val) #endif #ifndef raw_cpu_add_return_8 #define raw_cpu_add_return_8(pcp, val) raw_cpu_generic_add_return(pcp, val) #endif #ifndef raw_cpu_xchg_1 #define raw_cpu_xchg_1(pcp, nval) raw_cpu_generic_xchg(pcp, nval) #endif #ifndef raw_cpu_xchg_2 #define raw_cpu_xchg_2(pcp, nval) raw_cpu_generic_xchg(pcp, nval) #endif #ifndef raw_cpu_xchg_4 #define raw_cpu_xchg_4(pcp, nval) raw_cpu_generic_xchg(pcp, nval) #endif #ifndef raw_cpu_xchg_8 #define raw_cpu_xchg_8(pcp, nval) raw_cpu_generic_xchg(pcp, nval) #endif #ifndef raw_cpu_cmpxchg_1 #define raw_cpu_cmpxchg_1(pcp, oval, nval) \ raw_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef raw_cpu_cmpxchg_2 #define raw_cpu_cmpxchg_2(pcp, oval, nval) \ raw_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef raw_cpu_cmpxchg_4 #define raw_cpu_cmpxchg_4(pcp, oval, nval) \ raw_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef raw_cpu_cmpxchg_8 #define raw_cpu_cmpxchg_8(pcp, oval, nval) \ raw_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef raw_cpu_cmpxchg_double_1 #define raw_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef raw_cpu_cmpxchg_double_2 #define raw_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef raw_cpu_cmpxchg_double_4 #define raw_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef raw_cpu_cmpxchg_double_8 #define raw_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ raw_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef this_cpu_read_1 #define this_cpu_read_1(pcp) this_cpu_generic_read(pcp) #endif #ifndef this_cpu_read_2 #define this_cpu_read_2(pcp) this_cpu_generic_read(pcp) #endif #ifndef this_cpu_read_4 #define this_cpu_read_4(pcp) this_cpu_generic_read(pcp) #endif #ifndef this_cpu_read_8 #define this_cpu_read_8(pcp) this_cpu_generic_read(pcp) #endif #ifndef this_cpu_write_1 #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) #endif #ifndef this_cpu_write_2 #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =) #endif #ifndef this_cpu_write_4 #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =) #endif #ifndef this_cpu_write_8 #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =) #endif #ifndef this_cpu_add_1 #define this_cpu_add_1(pcp, val) this_cpu_generic_to_op(pcp, val, +=) #endif #ifndef this_cpu_add_2 #define this_cpu_add_2(pcp, val) this_cpu_generic_to_op(pcp, val, +=) #endif #ifndef this_cpu_add_4 #define this_cpu_add_4(pcp, val) this_cpu_generic_to_op(pcp, val, +=) #endif #ifndef this_cpu_add_8 #define this_cpu_add_8(pcp, val) this_cpu_generic_to_op(pcp, val, +=) #endif #ifndef this_cpu_and_1 #define this_cpu_and_1(pcp, val) this_cpu_generic_to_op(pcp, val, &=) #endif #ifndef this_cpu_and_2 #define this_cpu_and_2(pcp, val) this_cpu_generic_to_op(pcp, val, &=) #endif #ifndef this_cpu_and_4 #define this_cpu_and_4(pcp, val) this_cpu_generic_to_op(pcp, val, &=) #endif #ifndef this_cpu_and_8 #define this_cpu_and_8(pcp, val) this_cpu_generic_to_op(pcp, val, &=) #endif #ifndef this_cpu_or_1 #define this_cpu_or_1(pcp, val) this_cpu_generic_to_op(pcp, val, |=) #endif #ifndef this_cpu_or_2 #define this_cpu_or_2(pcp, val) this_cpu_generic_to_op(pcp, val, |=) #endif #ifndef this_cpu_or_4 #define this_cpu_or_4(pcp, val) this_cpu_generic_to_op(pcp, val, |=) #endif #ifndef this_cpu_or_8 #define this_cpu_or_8(pcp, val) this_cpu_generic_to_op(pcp, val, |=) #endif #ifndef this_cpu_add_return_1 #define this_cpu_add_return_1(pcp, val) this_cpu_generic_add_return(pcp, val) #endif #ifndef this_cpu_add_return_2 #define this_cpu_add_return_2(pcp, val) this_cpu_generic_add_return(pcp, val) #endif #ifndef this_cpu_add_return_4 #define this_cpu_add_return_4(pcp, val) this_cpu_generic_add_return(pcp, val) #endif #ifndef this_cpu_add_return_8 #define this_cpu_add_return_8(pcp, val) this_cpu_generic_add_return(pcp, val) #endif #ifndef this_cpu_xchg_1 #define this_cpu_xchg_1(pcp, nval) this_cpu_generic_xchg(pcp, nval) #endif #ifndef this_cpu_xchg_2 #define this_cpu_xchg_2(pcp, nval) this_cpu_generic_xchg(pcp, nval) #endif #ifndef this_cpu_xchg_4 #define this_cpu_xchg_4(pcp, nval) this_cpu_generic_xchg(pcp, nval) #endif #ifndef this_cpu_xchg_8 #define this_cpu_xchg_8(pcp, nval) this_cpu_generic_xchg(pcp, nval) #endif #ifndef this_cpu_cmpxchg_1 #define this_cpu_cmpxchg_1(pcp, oval, nval) \ this_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef this_cpu_cmpxchg_2 #define this_cpu_cmpxchg_2(pcp, oval, nval) \ this_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef this_cpu_cmpxchg_4 #define this_cpu_cmpxchg_4(pcp, oval, nval) \ this_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef this_cpu_cmpxchg_8 #define this_cpu_cmpxchg_8(pcp, oval, nval) \ this_cpu_generic_cmpxchg(pcp, oval, nval) #endif #ifndef this_cpu_cmpxchg_double_1 #define this_cpu_cmpxchg_double_1(pcp1, pcp2, oval1, oval2, nval1, nval2) \ this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef this_cpu_cmpxchg_double_2 #define this_cpu_cmpxchg_double_2(pcp1, pcp2, oval1, oval2, nval1, nval2) \ this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef this_cpu_cmpxchg_double_4 #define this_cpu_cmpxchg_double_4(pcp1, pcp2, oval1, oval2, nval1, nval2) \ this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #ifndef this_cpu_cmpxchg_double_8 #define this_cpu_cmpxchg_double_8(pcp1, pcp2, oval1, oval2, nval1, nval2) \ this_cpu_generic_cmpxchg_double(pcp1, pcp2, oval1, oval2, nval1, nval2) #endif #endif /* _ASM_GENERIC_PERCPU_H_ */