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- #ifndef __LINUX_PERCPU_H
- #define __LINUX_PERCPU_H
- #include <linux/preempt.h>
- #include <linux/slab.h> /* For kmalloc() */
- #include <linux/smp.h>
- #include <linux/cpumask.h>
- #include <linux/pfn.h>
- #include <asm/percpu.h>
- /* enough to cover all DEFINE_PER_CPUs in modules */
- #ifdef CONFIG_MODULES
- #define PERCPU_MODULE_RESERVE (8 << 10)
- #else
- #define PERCPU_MODULE_RESERVE 0
- #endif
- #ifndef PERCPU_ENOUGH_ROOM
- #define PERCPU_ENOUGH_ROOM \
- (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) + \
- PERCPU_MODULE_RESERVE)
- #endif
- /*
- * Must be an lvalue. Since @var must be a simple identifier,
- * we force a syntax error here if it isn't.
- */
- #define get_cpu_var(var) (*({ \
- extern int simple_identifier_##var(void); \
- preempt_disable(); \
- &__get_cpu_var(var); }))
- #define put_cpu_var(var) preempt_enable()
- #ifdef CONFIG_SMP
- /* minimum unit size, also is the maximum supported allocation size */
- #define PCPU_MIN_UNIT_SIZE PFN_ALIGN(64 << 10)
- /*
- * PERCPU_DYNAMIC_RESERVE indicates the amount of free area to piggy
- * back on the first chunk for dynamic percpu allocation if arch is
- * manually allocating and mapping it for faster access (as a part of
- * large page mapping for example).
- *
- * The following values give between one and two pages of free space
- * after typical minimal boot (2-way SMP, single disk and NIC) with
- * both defconfig and a distro config on x86_64 and 32. More
- * intelligent way to determine this would be nice.
- */
- #if BITS_PER_LONG > 32
- #define PERCPU_DYNAMIC_RESERVE (20 << 10)
- #else
- #define PERCPU_DYNAMIC_RESERVE (12 << 10)
- #endif
- extern void *pcpu_base_addr;
- extern const unsigned long *pcpu_unit_offsets;
- struct pcpu_group_info {
- int nr_units; /* aligned # of units */
- unsigned long base_offset; /* base address offset */
- unsigned int *cpu_map; /* unit->cpu map, empty
- * entries contain NR_CPUS */
- };
- struct pcpu_alloc_info {
- size_t static_size;
- size_t reserved_size;
- size_t dyn_size;
- size_t unit_size;
- size_t atom_size;
- size_t alloc_size;
- size_t __ai_size; /* internal, don't use */
- int nr_groups; /* 0 if grouping unnecessary */
- struct pcpu_group_info groups[];
- };
- enum pcpu_fc {
- PCPU_FC_AUTO,
- PCPU_FC_EMBED,
- PCPU_FC_PAGE,
- PCPU_FC_NR,
- };
- extern const char *pcpu_fc_names[PCPU_FC_NR];
- extern enum pcpu_fc pcpu_chosen_fc;
- typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size,
- size_t align);
- typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
- typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
- typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);
- extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
- int nr_units);
- extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
- extern struct pcpu_alloc_info * __init pcpu_build_alloc_info(
- size_t reserved_size, ssize_t dyn_size,
- size_t atom_size,
- pcpu_fc_cpu_distance_fn_t cpu_distance_fn);
- extern int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
- void *base_addr);
- #ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
- extern int __init pcpu_embed_first_chunk(size_t reserved_size, ssize_t dyn_size,
- size_t atom_size,
- pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn);
- #endif
- #ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
- extern int __init pcpu_page_first_chunk(size_t reserved_size,
- pcpu_fc_alloc_fn_t alloc_fn,
- pcpu_fc_free_fn_t free_fn,
- pcpu_fc_populate_pte_fn_t populate_pte_fn);
- #endif
- /*
- * Use this to get to a cpu's version of the per-cpu object
- * dynamically allocated. Non-atomic access to the current CPU's
- * version should probably be combined with get_cpu()/put_cpu().
- */
- #define per_cpu_ptr(ptr, cpu) SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu)))
- extern void *__alloc_reserved_percpu(size_t size, size_t align);
- extern void *__alloc_percpu(size_t size, size_t align);
- extern void free_percpu(void *__pdata);
- #ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
- extern void __init setup_per_cpu_areas(void);
- #endif
- #else /* CONFIG_SMP */
- #define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
- static inline void *__alloc_percpu(size_t size, size_t align)
- {
- /*
- * Can't easily make larger alignment work with kmalloc. WARN
- * on it. Larger alignment should only be used for module
- * percpu sections on SMP for which this path isn't used.
- */
- WARN_ON_ONCE(align > SMP_CACHE_BYTES);
- return kzalloc(size, GFP_KERNEL);
- }
- static inline void free_percpu(void *p)
- {
- kfree(p);
- }
- static inline void __init setup_per_cpu_areas(void) { }
- static inline void *pcpu_lpage_remapped(void *kaddr)
- {
- return NULL;
- }
- #endif /* CONFIG_SMP */
- #define alloc_percpu(type) (type *)__alloc_percpu(sizeof(type), \
- __alignof__(type))
- /*
- * Optional methods for optimized non-lvalue per-cpu variable access.
- *
- * @var can be a percpu variable or a field of it and its size should
- * equal char, int or long. percpu_read() evaluates to a lvalue and
- * all others to void.
- *
- * These operations are guaranteed to be atomic w.r.t. preemption.
- * The generic versions use plain get/put_cpu_var(). Archs are
- * encouraged to implement single-instruction alternatives which don't
- * require preemption protection.
- */
- #ifndef percpu_read
- # define percpu_read(var) \
- ({ \
- typeof(per_cpu_var(var)) __tmp_var__; \
- __tmp_var__ = get_cpu_var(var); \
- put_cpu_var(var); \
- __tmp_var__; \
- })
- #endif
- #define __percpu_generic_to_op(var, val, op) \
- do { \
- get_cpu_var(var) op val; \
- put_cpu_var(var); \
- } while (0)
- #ifndef percpu_write
- # define percpu_write(var, val) __percpu_generic_to_op(var, (val), =)
- #endif
- #ifndef percpu_add
- # define percpu_add(var, val) __percpu_generic_to_op(var, (val), +=)
- #endif
- #ifndef percpu_sub
- # define percpu_sub(var, val) __percpu_generic_to_op(var, (val), -=)
- #endif
- #ifndef percpu_and
- # define percpu_and(var, val) __percpu_generic_to_op(var, (val), &=)
- #endif
- #ifndef percpu_or
- # define percpu_or(var, val) __percpu_generic_to_op(var, (val), |=)
- #endif
- #ifndef percpu_xor
- # define percpu_xor(var, val) __percpu_generic_to_op(var, (val), ^=)
- #endif
- /*
- * Branching function to split up a function into a set of functions that
- * are called for different scalar sizes of the objects handled.
- */
- extern void __bad_size_call_parameter(void);
- #define __size_call_return(stem, variable) \
- ({ typeof(variable) ret__; \
- switch(sizeof(variable)) { \
- case 1: ret__ = stem##1(variable);break; \
- case 2: ret__ = stem##2(variable);break; \
- case 4: ret__ = stem##4(variable);break; \
- case 8: ret__ = stem##8(variable);break; \
- default: \
- __bad_size_call_parameter();break; \
- } \
- ret__; \
- })
- #define __size_call(stem, variable, ...) \
- do { \
- switch(sizeof(variable)) { \
- case 1: stem##1(variable, __VA_ARGS__);break; \
- case 2: stem##2(variable, __VA_ARGS__);break; \
- case 4: stem##4(variable, __VA_ARGS__);break; \
- case 8: stem##8(variable, __VA_ARGS__);break; \
- default: \
- __bad_size_call_parameter();break; \
- } \
- } while (0)
- /*
- * Optimized manipulation for memory allocated through the per cpu
- * allocator or for addresses of per cpu variables (can be determined
- * using per_cpu_var(xx).
- *
- * These operation guarantee exclusivity of access for other operations
- * on the *same* processor. The assumption is that per cpu data is only
- * accessed by a single processor instance (the current one).
- *
- * The first group is used for accesses that must be done in a
- * preemption safe way since we know that the context is not preempt
- * safe. Interrupts may occur. If the interrupt modifies the variable
- * too then RMW actions will not be reliable.
- *
- * The arch code can provide optimized functions in two ways:
- *
- * 1. Override the function completely. F.e. define this_cpu_add().
- * The arch must then ensure that the various scalar format passed
- * are handled correctly.
- *
- * 2. Provide functions for certain scalar sizes. F.e. provide
- * this_cpu_add_2() to provide per cpu atomic operations for 2 byte
- * sized RMW actions. If arch code does not provide operations for
- * a scalar size then the fallback in the generic code will be
- * used.
- */
- #define _this_cpu_generic_read(pcp) \
- ({ typeof(pcp) ret__; \
- preempt_disable(); \
- ret__ = *this_cpu_ptr(&(pcp)); \
- preempt_enable(); \
- ret__; \
- })
- #ifndef this_cpu_read
- # 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
- # define this_cpu_read(pcp) __size_call_return(this_cpu_read_, (pcp))
- #endif
- #define _this_cpu_generic_to_op(pcp, val, op) \
- do { \
- preempt_disable(); \
- *__this_cpu_ptr(&pcp) op val; \
- preempt_enable(); \
- } while (0)
- #ifndef this_cpu_write
- # 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
- # define this_cpu_write(pcp, val) __size_call(this_cpu_write_, (pcp), (val))
- #endif
- #ifndef this_cpu_add
- # 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
- # define this_cpu_add(pcp, val) __size_call(this_cpu_add_, (pcp), (val))
- #endif
- #ifndef this_cpu_sub
- # define this_cpu_sub(pcp, val) this_cpu_add((pcp), -(val))
- #endif
- #ifndef this_cpu_inc
- # define this_cpu_inc(pcp) this_cpu_add((pcp), 1)
- #endif
- #ifndef this_cpu_dec
- # define this_cpu_dec(pcp) this_cpu_sub((pcp), 1)
- #endif
- #ifndef this_cpu_and
- # 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
- # define this_cpu_and(pcp, val) __size_call(this_cpu_and_, (pcp), (val))
- #endif
- #ifndef this_cpu_or
- # 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
- # define this_cpu_or(pcp, val) __size_call(this_cpu_or_, (pcp), (val))
- #endif
- #ifndef this_cpu_xor
- # ifndef this_cpu_xor_1
- # define this_cpu_xor_1(pcp, val) _this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef this_cpu_xor_2
- # define this_cpu_xor_2(pcp, val) _this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef this_cpu_xor_4
- # define this_cpu_xor_4(pcp, val) _this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef this_cpu_xor_8
- # define this_cpu_xor_8(pcp, val) _this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # define this_cpu_xor(pcp, val) __size_call(this_cpu_or_, (pcp), (val))
- #endif
- /*
- * Generic percpu operations that do not require preemption handling.
- * Either we do not care about races or the caller has the
- * responsibility of handling preemptions issues. Arch code can still
- * override these instructions since the arch per cpu code may be more
- * efficient and may actually get race freeness for free (that is the
- * case for x86 for example).
- *
- * If there is no other protection through preempt disable and/or
- * disabling interupts then one of these RMW operations can show unexpected
- * behavior because the execution thread was rescheduled on another processor
- * or an interrupt occurred and the same percpu variable was modified from
- * the interrupt context.
- */
- #ifndef __this_cpu_read
- # ifndef __this_cpu_read_1
- # define __this_cpu_read_1(pcp) (*__this_cpu_ptr(&(pcp)))
- # endif
- # ifndef __this_cpu_read_2
- # define __this_cpu_read_2(pcp) (*__this_cpu_ptr(&(pcp)))
- # endif
- # ifndef __this_cpu_read_4
- # define __this_cpu_read_4(pcp) (*__this_cpu_ptr(&(pcp)))
- # endif
- # ifndef __this_cpu_read_8
- # define __this_cpu_read_8(pcp) (*__this_cpu_ptr(&(pcp)))
- # endif
- # define __this_cpu_read(pcp) __size_call_return(__this_cpu_read_, (pcp))
- #endif
- #define __this_cpu_generic_to_op(pcp, val, op) \
- do { \
- *__this_cpu_ptr(&(pcp)) op val; \
- } while (0)
- #ifndef __this_cpu_write
- # 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
- # define __this_cpu_write(pcp, val) __size_call(__this_cpu_write_, (pcp), (val))
- #endif
- #ifndef __this_cpu_add
- # 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
- # define __this_cpu_add(pcp, val) __size_call(__this_cpu_add_, (pcp), (val))
- #endif
- #ifndef __this_cpu_sub
- # define __this_cpu_sub(pcp, val) __this_cpu_add((pcp), -(val))
- #endif
- #ifndef __this_cpu_inc
- # define __this_cpu_inc(pcp) __this_cpu_add((pcp), 1)
- #endif
- #ifndef __this_cpu_dec
- # define __this_cpu_dec(pcp) __this_cpu_sub((pcp), 1)
- #endif
- #ifndef __this_cpu_and
- # 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
- # define __this_cpu_and(pcp, val) __size_call(__this_cpu_and_, (pcp), (val))
- #endif
- #ifndef __this_cpu_or
- # 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
- # define __this_cpu_or(pcp, val) __size_call(__this_cpu_or_, (pcp), (val))
- #endif
- #ifndef __this_cpu_xor
- # ifndef __this_cpu_xor_1
- # define __this_cpu_xor_1(pcp, val) __this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef __this_cpu_xor_2
- # define __this_cpu_xor_2(pcp, val) __this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef __this_cpu_xor_4
- # define __this_cpu_xor_4(pcp, val) __this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef __this_cpu_xor_8
- # define __this_cpu_xor_8(pcp, val) __this_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # define __this_cpu_xor(pcp, val) __size_call(__this_cpu_xor_, (pcp), (val))
- #endif
- /*
- * IRQ safe versions of the per cpu RMW operations. Note that these operations
- * are *not* safe against modification of the same variable from another
- * processors (which one gets when using regular atomic operations)
- . They are guaranteed to be atomic vs. local interrupts and
- * preemption only.
- */
- #define irqsafe_cpu_generic_to_op(pcp, val, op) \
- do { \
- unsigned long flags; \
- local_irq_save(flags); \
- *__this_cpu_ptr(&(pcp)) op val; \
- local_irq_restore(flags); \
- } while (0)
- #ifndef irqsafe_cpu_add
- # ifndef irqsafe_cpu_add_1
- # define irqsafe_cpu_add_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
- # endif
- # ifndef irqsafe_cpu_add_2
- # define irqsafe_cpu_add_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
- # endif
- # ifndef irqsafe_cpu_add_4
- # define irqsafe_cpu_add_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
- # endif
- # ifndef irqsafe_cpu_add_8
- # define irqsafe_cpu_add_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
- # endif
- # define irqsafe_cpu_add(pcp, val) __size_call(irqsafe_cpu_add_, (pcp), (val))
- #endif
- #ifndef irqsafe_cpu_sub
- # define irqsafe_cpu_sub(pcp, val) irqsafe_cpu_add((pcp), -(val))
- #endif
- #ifndef irqsafe_cpu_inc
- # define irqsafe_cpu_inc(pcp) irqsafe_cpu_add((pcp), 1)
- #endif
- #ifndef irqsafe_cpu_dec
- # define irqsafe_cpu_dec(pcp) irqsafe_cpu_sub((pcp), 1)
- #endif
- #ifndef irqsafe_cpu_and
- # ifndef irqsafe_cpu_and_1
- # define irqsafe_cpu_and_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
- # endif
- # ifndef irqsafe_cpu_and_2
- # define irqsafe_cpu_and_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
- # endif
- # ifndef irqsafe_cpu_and_4
- # define irqsafe_cpu_and_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
- # endif
- # ifndef irqsafe_cpu_and_8
- # define irqsafe_cpu_and_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
- # endif
- # define irqsafe_cpu_and(pcp, val) __size_call(irqsafe_cpu_and_, (val))
- #endif
- #ifndef irqsafe_cpu_or
- # ifndef irqsafe_cpu_or_1
- # define irqsafe_cpu_or_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
- # endif
- # ifndef irqsafe_cpu_or_2
- # define irqsafe_cpu_or_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
- # endif
- # ifndef irqsafe_cpu_or_4
- # define irqsafe_cpu_or_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
- # endif
- # ifndef irqsafe_cpu_or_8
- # define irqsafe_cpu_or_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
- # endif
- # define irqsafe_cpu_or(pcp, val) __size_call(irqsafe_cpu_or_, (val))
- #endif
- #ifndef irqsafe_cpu_xor
- # ifndef irqsafe_cpu_xor_1
- # define irqsafe_cpu_xor_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef irqsafe_cpu_xor_2
- # define irqsafe_cpu_xor_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef irqsafe_cpu_xor_4
- # define irqsafe_cpu_xor_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # ifndef irqsafe_cpu_xor_8
- # define irqsafe_cpu_xor_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
- # endif
- # define irqsafe_cpu_xor(pcp, val) __size_call(irqsafe_cpu_xor_, (val))
- #endif
- #endif /* __LINUX_PERCPU_H */
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