LXR linux/include/linux/percpu.h

   1#ifndef __LINUX_PERCPU_H
   2#define __LINUX_PERCPU_H
   3
   4#include <linux/preempt.h>
   5#include <linux/slab.h> /* For kmalloc() */
   6#include <linux/smp.h>
   7#include <linux/cpumask.h>
   8#include <linux/pfn.h>
   9
  10#include <asm/percpu.h>
  11
  12/* enough to cover all DEFINE_PER_CPUs in modules */
  13#ifdef CONFIG_MODULES
  14#define PERCPU_MODULE_RESERVE           (8 << 10)
  15#else
  16#define PERCPU_MODULE_RESERVE           0
  17#endif
  18
  19#ifndef PERCPU_ENOUGH_ROOM
  20#define PERCPU_ENOUGH_ROOM                                              \
  21        (ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES) +      \
  22         PERCPU_MODULE_RESERVE)
  23#endif
  24
  25/*
  26 * Must be an lvalue. Since @var must be a simple identifier,
  27 * we force a syntax error here if it isn't.
  28 */
  29#define get_cpu_var(var) (*({                           \
  30        extern int simple_identifier_##var(void);       \
  31        preempt_disable();                              \
  32        &__get_cpu_var(var); }))
  33#define put_cpu_var(var) preempt_enable()
  34
  35#ifdef CONFIG_SMP
  36
  37/* minimum unit size, also is the maximum supported allocation size */
  38#define PCPU_MIN_UNIT_SIZE              PFN_ALIGN(64 << 10)
  39
  40/*
  41 * PERCPU_DYNAMIC_RESERVE indicates the amount of free area to piggy
  42 * back on the first chunk for dynamic percpu allocation if arch is
  43 * manually allocating and mapping it for faster access (as a part of
  44 * large page mapping for example).
  45 *
  46 * The following values give between one and two pages of free space
  47 * after typical minimal boot (2-way SMP, single disk and NIC) with
  48 * both defconfig and a distro config on x86_64 and 32.  More
  49 * intelligent way to determine this would be nice.
  50 */
  51#if BITS_PER_LONG > 32
  52#define PERCPU_DYNAMIC_RESERVE          (20 << 10)
  53#else
  54#define PERCPU_DYNAMIC_RESERVE          (12 << 10)
  55#endif
  56
  57extern void *pcpu_base_addr;
  58extern const unsigned long *pcpu_unit_offsets;
  59
  60struct pcpu_group_info {
  61        int                     nr_units;       /* aligned # of units */
  62        unsigned long           base_offset;    /* base address offset */
  63        unsigned int            *cpu_map;       /* unit->cpu map, empty
  64                                                 * entries contain NR_CPUS */
  65};
  66
  67struct pcpu_alloc_info {
  68        size_t                  static_size;
  69        size_t                  reserved_size;
  70        size_t                  dyn_size;
  71        size_t                  unit_size;
  72        size_t                  atom_size;
  73        size_t                  alloc_size;
  74        size_t                  __ai_size;      /* internal, don't use */
  75        int                     nr_groups;      /* 0 if grouping unnecessary */
  76        struct pcpu_group_info  groups[];
  77};
  78
  79enum pcpu_fc {
  80        PCPU_FC_AUTO,
  81        PCPU_FC_EMBED,
  82        PCPU_FC_PAGE,
  83
  84        PCPU_FC_NR,
  85};
  86extern const char *pcpu_fc_names[PCPU_FC_NR];
  87
  88extern enum pcpu_fc pcpu_chosen_fc;
  89
  90typedef void * (*pcpu_fc_alloc_fn_t)(unsigned int cpu, size_t size,
  91                                     size_t align);
  92typedef void (*pcpu_fc_free_fn_t)(void *ptr, size_t size);
  93typedef void (*pcpu_fc_populate_pte_fn_t)(unsigned long addr);
  94typedef int (pcpu_fc_cpu_distance_fn_t)(unsigned int from, unsigned int to);
  95
  96extern struct pcpu_alloc_info * __init pcpu_alloc_alloc_info(int nr_groups,
  97                                                             int nr_units);
  98extern void __init pcpu_free_alloc_info(struct pcpu_alloc_info *ai);
  99
 100extern struct pcpu_alloc_info * __init pcpu_build_alloc_info(
 101                                size_t reserved_size, ssize_t dyn_size,
 102                                size_t atom_size,
 103                                pcpu_fc_cpu_distance_fn_t cpu_distance_fn);
 104
 105extern int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
 106                                         void *base_addr);
 107
 108#ifdef CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK
 109extern int __init pcpu_embed_first_chunk(size_t reserved_size, ssize_t dyn_size,
 110                                size_t atom_size,
 111                                pcpu_fc_cpu_distance_fn_t cpu_distance_fn,
 112                                pcpu_fc_alloc_fn_t alloc_fn,
 113                                pcpu_fc_free_fn_t free_fn);
 114#endif
 115
 116#ifdef CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK
 117extern int __init pcpu_page_first_chunk(size_t reserved_size,
 118                                pcpu_fc_alloc_fn_t alloc_fn,
 119                                pcpu_fc_free_fn_t free_fn,
 120                                pcpu_fc_populate_pte_fn_t populate_pte_fn);
 121#endif
 122
 123/*
 124 * Use this to get to a cpu's version of the per-cpu object
 125 * dynamically allocated. Non-atomic access to the current CPU's
 126 * version should probably be combined with get_cpu()/put_cpu().
 127 */
 128#define per_cpu_ptr(ptr, cpu)   SHIFT_PERCPU_PTR((ptr), per_cpu_offset((cpu)))
 129
 130extern void *__alloc_reserved_percpu(size_t size, size_t align);
 131extern void *__alloc_percpu(size_t size, size_t align);
 132extern void free_percpu(void *__pdata);
 133extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
 134
 135#ifndef CONFIG_HAVE_SETUP_PER_CPU_AREA
 136extern void __init setup_per_cpu_areas(void);
 137#endif
 138
 139#else /* CONFIG_SMP */
 140
 141#define per_cpu_ptr(ptr, cpu) ({ (void)(cpu); (ptr); })
 142
 143static inline void *__alloc_percpu(size_t size, size_t align)
 144{
 145        /*
 146         * Can't easily make larger alignment work with kmalloc.  WARN
 147         * on it.  Larger alignment should only be used for module
 148         * percpu sections on SMP for which this path isn't used.
 149         */
 150        WARN_ON_ONCE(align > SMP_CACHE_BYTES);
 151        return kzalloc(size, GFP_KERNEL);
 152}
 153
 154static inline void free_percpu(void *p)
 155{
 156        kfree(p);
 157}
 158
 159static inline phys_addr_t per_cpu_ptr_to_phys(void *addr)
 160{
 161        return __pa(addr);
 162}
 163
 164static inline void __init setup_per_cpu_areas(void) { }
 165
 166static inline void *pcpu_lpage_remapped(void *kaddr)
 167{
 168        return NULL;
 169}
 170
 171#endif /* CONFIG_SMP */
 172
 173#define alloc_percpu(type)      \
 174        (typeof(type) *)__alloc_percpu(sizeof(type), __alignof__(type))
 175
 176/*
 177 * Optional methods for optimized non-lvalue per-cpu variable access.
 178 *
 179 * @var can be a percpu variable or a field of it and its size should
 180 * equal char, int or long.  percpu_read() evaluates to a lvalue and
 181 * all others to void.
 182 *
 183 * These operations are guaranteed to be atomic w.r.t. preemption.
 184 * The generic versions use plain get/put_cpu_var().  Archs are
 185 * encouraged to implement single-instruction alternatives which don't
 186 * require preemption protection.
 187 */
 188#ifndef percpu_read
 189# define percpu_read(var)                                               \
 190  ({                                                                    \
 191        typeof(per_cpu_var(var)) __tmp_var__;                           \
 192        __tmp_var__ = get_cpu_var(var);                                 \
 193        put_cpu_var(var);                                               \
 194        __tmp_var__;                                                    \
 195  })
 196#endif
 197
 198#define __percpu_generic_to_op(var, val, op)                            \
 199do {                                                                    \
 200        get_cpu_var(var) op val;                                        \
 201        put_cpu_var(var);                                               \
 202} while (0)
 203
 204#ifndef percpu_write
 205# define percpu_write(var, val)         __percpu_generic_to_op(var, (val), =)
 206#endif
 207
 208#ifndef percpu_add
 209# define percpu_add(var, val)           __percpu_generic_to_op(var, (val), +=)
 210#endif
 211
 212#ifndef percpu_sub
 213# define percpu_sub(var, val)           __percpu_generic_to_op(var, (val), -=)
 214#endif
 215
 216#ifndef percpu_and
 217# define percpu_and(var, val)           __percpu_generic_to_op(var, (val), &=)
 218#endif
 219
 220#ifndef percpu_or
 221# define percpu_or(var, val)            __percpu_generic_to_op(var, (val), |=)
 222#endif
 223
 224#ifndef percpu_xor
 225# define percpu_xor(var, val)           __percpu_generic_to_op(var, (val), ^=)
 226#endif
 227
 228/*
 229 * Branching function to split up a function into a set of functions that
 230 * are called for different scalar sizes of the objects handled.
 231 */
 232
 233extern void __bad_size_call_parameter(void);
 234
 235#define __pcpu_size_call_return(stem, variable)                         \
 236({      typeof(variable) pscr_ret__;                                    \
 237        switch(sizeof(variable)) {                                      \
 238        case 1: pscr_ret__ = stem##1(variable);break;                   \
 239        case 2: pscr_ret__ = stem##2(variable);break;                   \
 240        case 4: pscr_ret__ = stem##4(variable);break;                   \
 241        case 8: pscr_ret__ = stem##8(variable);break;                   \
 242        default:                                                        \
 243                __bad_size_call_parameter();break;                      \
 244        }                                                               \
 245        pscr_ret__;                                                     \
 246})
 247
 248#define __pcpu_size_call(stem, variable, ...)                           \
 249do {                                                                    \
 250        switch(sizeof(variable)) {                                      \
 251                case 1: stem##1(variable, __VA_ARGS__);break;           \
 252                case 2: stem##2(variable, __VA_ARGS__);break;           \
 253                case 4: stem##4(variable, __VA_ARGS__);break;           \
 254                case 8: stem##8(variable, __VA_ARGS__);break;           \
 255                default:                                                \
 256                        __bad_size_call_parameter();break;              \
 257        }                                                               \
 258} while (0)
 259
 260/*
 261 * Optimized manipulation for memory allocated through the per cpu
 262 * allocator or for addresses of per cpu variables (can be determined
 263 * using per_cpu_var(xx).
 264 *
 265 * These operation guarantee exclusivity of access for other operations
 266 * on the *same* processor. The assumption is that per cpu data is only
 267 * accessed by a single processor instance (the current one).
 268 *
 269 * The first group is used for accesses that must be done in a
 270 * preemption safe way since we know that the context is not preempt
 271 * safe. Interrupts may occur. If the interrupt modifies the variable
 272 * too then RMW actions will not be reliable.
 273 *
 274 * The arch code can provide optimized functions in two ways:
 275 *
 276 * 1. Override the function completely. F.e. define this_cpu_add().
 277 *    The arch must then ensure that the various scalar format passed
 278 *    are handled correctly.
 279 *
 280 * 2. Provide functions for certain scalar sizes. F.e. provide
 281 *    this_cpu_add_2() to provide per cpu atomic operations for 2 byte
 282 *    sized RMW actions. If arch code does not provide operations for
 283 *    a scalar size then the fallback in the generic code will be
 284 *    used.
 285 */
 286
 287#define _this_cpu_generic_read(pcp)                                     \
 288({      typeof(pcp) ret__;                                              \
 289        preempt_disable();                                              \
 290        ret__ = *this_cpu_ptr(&(pcp));                                  \
 291        preempt_enable();                                               \
 292        ret__;                                                          \
 293})
 294
 295#ifndef this_cpu_read
 296# ifndef this_cpu_read_1
 297#  define this_cpu_read_1(pcp)  _this_cpu_generic_read(pcp)
 298# endif
 299# ifndef this_cpu_read_2
 300#  define this_cpu_read_2(pcp)  _this_cpu_generic_read(pcp)
 301# endif
 302# ifndef this_cpu_read_4
 303#  define this_cpu_read_4(pcp)  _this_cpu_generic_read(pcp)
 304# endif
 305# ifndef this_cpu_read_8
 306#  define this_cpu_read_8(pcp)  _this_cpu_generic_read(pcp)
 307# endif
 308# define this_cpu_read(pcp)     __pcpu_size_call_return(this_cpu_read_, (pcp))
 309#endif
 310
 311#define _this_cpu_generic_to_op(pcp, val, op)                           \
 312do {                                                                    \
 313        preempt_disable();                                              \
 314        *__this_cpu_ptr(&pcp) op val;                                   \
 315        preempt_enable();                                               \
 316} while (0)
 317
 318#ifndef this_cpu_write
 319# ifndef this_cpu_write_1
 320#  define this_cpu_write_1(pcp, val)    _this_cpu_generic_to_op((pcp), (val), =)
 321# endif
 322# ifndef this_cpu_write_2
 323#  define this_cpu_write_2(pcp, val)    _this_cpu_generic_to_op((pcp), (val), =)
 324# endif
 325# ifndef this_cpu_write_4
 326#  define this_cpu_write_4(pcp, val)    _this_cpu_generic_to_op((pcp), (val), =)
 327# endif
 328# ifndef this_cpu_write_8
 329#  define this_cpu_write_8(pcp, val)    _this_cpu_generic_to_op((pcp), (val), =)
 330# endif
 331# define this_cpu_write(pcp, val)       __pcpu_size_call(this_cpu_write_, (pcp), (val))
 332#endif
 333
 334#ifndef this_cpu_add
 335# ifndef this_cpu_add_1
 336#  define this_cpu_add_1(pcp, val)      _this_cpu_generic_to_op((pcp), (val), +=)
 337# endif
 338# ifndef this_cpu_add_2
 339#  define this_cpu_add_2(pcp, val)      _this_cpu_generic_to_op((pcp), (val), +=)
 340# endif
 341# ifndef this_cpu_add_4
 342#  define this_cpu_add_4(pcp, val)      _this_cpu_generic_to_op((pcp), (val), +=)
 343# endif
 344# ifndef this_cpu_add_8
 345#  define this_cpu_add_8(pcp, val)      _this_cpu_generic_to_op((pcp), (val), +=)
 346# endif
 347# define this_cpu_add(pcp, val)         __pcpu_size_call(this_cpu_add_, (pcp), (val))
 348#endif
 349
 350#ifndef this_cpu_sub
 351# define this_cpu_sub(pcp, val)         this_cpu_add((pcp), -(val))
 352#endif
 353
 354#ifndef this_cpu_inc
 355# define this_cpu_inc(pcp)              this_cpu_add((pcp), 1)
 356#endif
 357
 358#ifndef this_cpu_dec
 359# define this_cpu_dec(pcp)              this_cpu_sub((pcp), 1)
 360#endif
 361
 362#ifndef this_cpu_and
 363# ifndef this_cpu_and_1
 364#  define this_cpu_and_1(pcp, val)      _this_cpu_generic_to_op((pcp), (val), &=)
 365# endif
 366# ifndef this_cpu_and_2
 367#  define this_cpu_and_2(pcp, val)      _this_cpu_generic_to_op((pcp), (val), &=)
 368# endif
 369# ifndef this_cpu_and_4
 370#  define this_cpu_and_4(pcp, val)      _this_cpu_generic_to_op((pcp), (val), &=)
 371# endif
 372# ifndef this_cpu_and_8
 373#  define this_cpu_and_8(pcp, val)      _this_cpu_generic_to_op((pcp), (val), &=)
 374# endif
 375# define this_cpu_and(pcp, val)         __pcpu_size_call(this_cpu_and_, (pcp), (val))
 376#endif
 377
 378#ifndef this_cpu_or
 379# ifndef this_cpu_or_1
 380#  define this_cpu_or_1(pcp, val)       _this_cpu_generic_to_op((pcp), (val), |=)
 381# endif
 382# ifndef this_cpu_or_2
 383#  define this_cpu_or_2(pcp, val)       _this_cpu_generic_to_op((pcp), (val), |=)
 384# endif
 385# ifndef this_cpu_or_4
 386#  define this_cpu_or_4(pcp, val)       _this_cpu_generic_to_op((pcp), (val), |=)
 387# endif
 388# ifndef this_cpu_or_8
 389#  define this_cpu_or_8(pcp, val)       _this_cpu_generic_to_op((pcp), (val), |=)
 390# endif
 391# define this_cpu_or(pcp, val)          __pcpu_size_call(this_cpu_or_, (pcp), (val))
 392#endif
 393
 394#ifndef this_cpu_xor
 395# ifndef this_cpu_xor_1
 396#  define this_cpu_xor_1(pcp, val)      _this_cpu_generic_to_op((pcp), (val), ^=)
 397# endif
 398# ifndef this_cpu_xor_2
 399#  define this_cpu_xor_2(pcp, val)      _this_cpu_generic_to_op((pcp), (val), ^=)
 400# endif
 401# ifndef this_cpu_xor_4
 402#  define this_cpu_xor_4(pcp, val)      _this_cpu_generic_to_op((pcp), (val), ^=)
 403# endif
 404# ifndef this_cpu_xor_8
 405#  define this_cpu_xor_8(pcp, val)      _this_cpu_generic_to_op((pcp), (val), ^=)
 406# endif
 407# define this_cpu_xor(pcp, val)         __pcpu_size_call(this_cpu_or_, (pcp), (val))
 408#endif
 409
 410/*
 411 * Generic percpu operations that do not require preemption handling.
 412 * Either we do not care about races or the caller has the
 413 * responsibility of handling preemptions issues. Arch code can still
 414 * override these instructions since the arch per cpu code may be more
 415 * efficient and may actually get race freeness for free (that is the
 416 * case for x86 for example).
 417 *
 418 * If there is no other protection through preempt disable and/or
 419 * disabling interupts then one of these RMW operations can show unexpected
 420 * behavior because the execution thread was rescheduled on another processor
 421 * or an interrupt occurred and the same percpu variable was modified from
 422 * the interrupt context.
 423 */
 424#ifndef __this_cpu_read
 425# ifndef __this_cpu_read_1
 426#  define __this_cpu_read_1(pcp)        (*__this_cpu_ptr(&(pcp)))
 427# endif
 428# ifndef __this_cpu_read_2
 429#  define __this_cpu_read_2(pcp)        (*__this_cpu_ptr(&(pcp)))
 430# endif
 431# ifndef __this_cpu_read_4
 432#  define __this_cpu_read_4(pcp)        (*__this_cpu_ptr(&(pcp)))
 433# endif
 434# ifndef __this_cpu_read_8
 435#  define __this_cpu_read_8(pcp)        (*__this_cpu_ptr(&(pcp)))
 436# endif
 437# define __this_cpu_read(pcp)   __pcpu_size_call_return(__this_cpu_read_, (pcp))
 438#endif
 439
 440#define __this_cpu_generic_to_op(pcp, val, op)                          \
 441do {                                                                    \
 442        *__this_cpu_ptr(&(pcp)) op val;                                 \
 443} while (0)
 444
 445#ifndef __this_cpu_write
 446# ifndef __this_cpu_write_1
 447#  define __this_cpu_write_1(pcp, val)  __this_cpu_generic_to_op((pcp), (val), =)
 448# endif
 449# ifndef __this_cpu_write_2
 450#  define __this_cpu_write_2(pcp, val)  __this_cpu_generic_to_op((pcp), (val), =)
 451# endif
 452# ifndef __this_cpu_write_4
 453#  define __this_cpu_write_4(pcp, val)  __this_cpu_generic_to_op((pcp), (val), =)
 454# endif
 455# ifndef __this_cpu_write_8
 456#  define __this_cpu_write_8(pcp, val)  __this_cpu_generic_to_op((pcp), (val), =)
 457# endif
 458# define __this_cpu_write(pcp, val)     __pcpu_size_call(__this_cpu_write_, (pcp), (val))
 459#endif
 460
 461#ifndef __this_cpu_add
 462# ifndef __this_cpu_add_1
 463#  define __this_cpu_add_1(pcp, val)    __this_cpu_generic_to_op((pcp), (val), +=)
 464# endif
 465# ifndef __this_cpu_add_2
 466#  define __this_cpu_add_2(pcp, val)    __this_cpu_generic_to_op((pcp), (val), +=)
 467# endif
 468# ifndef __this_cpu_add_4
 469#  define __this_cpu_add_4(pcp, val)    __this_cpu_generic_to_op((pcp), (val), +=)
 470# endif
 471# ifndef __this_cpu_add_8
 472#  define __this_cpu_add_8(pcp, val)    __this_cpu_generic_to_op((pcp), (val), +=)
 473# endif
 474# define __this_cpu_add(pcp, val)       __pcpu_size_call(__this_cpu_add_, (pcp), (val))
 475#endif
 476
 477#ifndef __this_cpu_sub
 478# define __this_cpu_sub(pcp, val)       __this_cpu_add((pcp), -(val))
 479#endif
 480
 481#ifndef __this_cpu_inc
 482# define __this_cpu_inc(pcp)            __this_cpu_add((pcp), 1)
 483#endif
 484
 485#ifndef __this_cpu_dec
 486# define __this_cpu_dec(pcp)            __this_cpu_sub((pcp), 1)
 487#endif
 488
 489#ifndef __this_cpu_and
 490# ifndef __this_cpu_and_1
 491#  define __this_cpu_and_1(pcp, val)    __this_cpu_generic_to_op((pcp), (val), &=)
 492# endif
 493# ifndef __this_cpu_and_2
 494#  define __this_cpu_and_2(pcp, val)    __this_cpu_generic_to_op((pcp), (val), &=)
 495# endif
 496# ifndef __this_cpu_and_4
 497#  define __this_cpu_and_4(pcp, val)    __this_cpu_generic_to_op((pcp), (val), &=)
 498# endif
 499# ifndef __this_cpu_and_8
 500#  define __this_cpu_and_8(pcp, val)    __this_cpu_generic_to_op((pcp), (val), &=)
 501# endif
 502# define __this_cpu_and(pcp, val)       __pcpu_size_call(__this_cpu_and_, (pcp), (val))
 503#endif
 504
 505#ifndef __this_cpu_or
 506# ifndef __this_cpu_or_1
 507#  define __this_cpu_or_1(pcp, val)     __this_cpu_generic_to_op((pcp), (val), |=)
 508# endif
 509# ifndef __this_cpu_or_2
 510#  define __this_cpu_or_2(pcp, val)     __this_cpu_generic_to_op((pcp), (val), |=)
 511# endif
 512# ifndef __this_cpu_or_4
 513#  define __this_cpu_or_4(pcp, val)     __this_cpu_generic_to_op((pcp), (val), |=)
 514# endif
 515# ifndef __this_cpu_or_8
 516#  define __this_cpu_or_8(pcp, val)     __this_cpu_generic_to_op((pcp), (val), |=)
 517# endif
 518# define __this_cpu_or(pcp, val)        __pcpu_size_call(__this_cpu_or_, (pcp), (val))
 519#endif
 520
 521#ifndef __this_cpu_xor
 522# ifndef __this_cpu_xor_1
 523#  define __this_cpu_xor_1(pcp, val)    __this_cpu_generic_to_op((pcp), (val), ^=)
 524# endif
 525# ifndef __this_cpu_xor_2
 526#  define __this_cpu_xor_2(pcp, val)    __this_cpu_generic_to_op((pcp), (val), ^=)
 527# endif
 528# ifndef __this_cpu_xor_4
 529#  define __this_cpu_xor_4(pcp, val)    __this_cpu_generic_to_op((pcp), (val), ^=)
 530# endif
 531# ifndef __this_cpu_xor_8
 532#  define __this_cpu_xor_8(pcp, val)    __this_cpu_generic_to_op((pcp), (val), ^=)
 533# endif
 534# define __this_cpu_xor(pcp, val)       __pcpu_size_call(__this_cpu_xor_, (pcp), (val))
 535#endif
 536
 537/*
 538 * IRQ safe versions of the per cpu RMW operations. Note that these operations
 539 * are *not* safe against modification of the same variable from another
 540 * processors (which one gets when using regular atomic operations)
 541 . They are guaranteed to be atomic vs. local interrupts and
 542 * preemption only.
 543 */
 544#define irqsafe_cpu_generic_to_op(pcp, val, op)                         \
 545do {                                                                    \
 546        unsigned long flags;                                            \
 547        local_irq_save(flags);                                          \
 548        *__this_cpu_ptr(&(pcp)) op val;                                 \
 549        local_irq_restore(flags);                                       \
 550} while (0)
 551
 552#ifndef irqsafe_cpu_add
 553# ifndef irqsafe_cpu_add_1
 554#  define irqsafe_cpu_add_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
 555# endif
 556# ifndef irqsafe_cpu_add_2
 557#  define irqsafe_cpu_add_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
 558# endif
 559# ifndef irqsafe_cpu_add_4
 560#  define irqsafe_cpu_add_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
 561# endif
 562# ifndef irqsafe_cpu_add_8
 563#  define irqsafe_cpu_add_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), +=)
 564# endif
 565# define irqsafe_cpu_add(pcp, val) __pcpu_size_call(irqsafe_cpu_add_, (pcp), (val))
 566#endif
 567
 568#ifndef irqsafe_cpu_sub
 569# define irqsafe_cpu_sub(pcp, val)      irqsafe_cpu_add((pcp), -(val))
 570#endif
 571
 572#ifndef irqsafe_cpu_inc
 573# define irqsafe_cpu_inc(pcp)   irqsafe_cpu_add((pcp), 1)
 574#endif
 575
 576#ifndef irqsafe_cpu_dec
 577# define irqsafe_cpu_dec(pcp)   irqsafe_cpu_sub((pcp), 1)
 578#endif
 579
 580#ifndef irqsafe_cpu_and
 581# ifndef irqsafe_cpu_and_1
 582#  define irqsafe_cpu_and_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
 583# endif
 584# ifndef irqsafe_cpu_and_2
 585#  define irqsafe_cpu_and_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
 586# endif
 587# ifndef irqsafe_cpu_and_4
 588#  define irqsafe_cpu_and_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
 589# endif
 590# ifndef irqsafe_cpu_and_8
 591#  define irqsafe_cpu_and_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), &=)
 592# endif
 593# define irqsafe_cpu_and(pcp, val) __pcpu_size_call(irqsafe_cpu_and_, (val))
 594#endif
 595
 596#ifndef irqsafe_cpu_or
 597# ifndef irqsafe_cpu_or_1
 598#  define irqsafe_cpu_or_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
 599# endif
 600# ifndef irqsafe_cpu_or_2
 601#  define irqsafe_cpu_or_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
 602# endif
 603# ifndef irqsafe_cpu_or_4
 604#  define irqsafe_cpu_or_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
 605# endif
 606# ifndef irqsafe_cpu_or_8
 607#  define irqsafe_cpu_or_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), |=)
 608# endif
 609# define irqsafe_cpu_or(pcp, val) __pcpu_size_call(irqsafe_cpu_or_, (val))
 610#endif
 611
 612#ifndef irqsafe_cpu_xor
 613# ifndef irqsafe_cpu_xor_1
 614#  define irqsafe_cpu_xor_1(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
 615# endif
 616# ifndef irqsafe_cpu_xor_2
 617#  define irqsafe_cpu_xor_2(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
 618# endif
 619# ifndef irqsafe_cpu_xor_4
 620#  define irqsafe_cpu_xor_4(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
 621# endif
 622# ifndef irqsafe_cpu_xor_8
 623#  define irqsafe_cpu_xor_8(pcp, val) irqsafe_cpu_generic_to_op((pcp), (val), ^=)
 624# endif
 625# define irqsafe_cpu_xor(pcp, val) __pcpu_size_call(irqsafe_cpu_xor_, (val))
 626#endif
 627
 628#endif /* __LINUX_PERCPU_H */
 629