| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Christoph Lameter | 553 | 30.49% | 9 | 13.24% |
| Uros Bizjak | 481 | 26.52% | 21 | 30.88% |
| Brian Gerst | 304 | 16.76% | 10 | 14.71% |
| Mike Travis | 198 | 10.92% | 2 | 2.94% |
| Peter Zijlstra | 79 | 4.36% | 3 | 4.41% |
| Nadav Amit | 65 | 3.58% | 1 | 1.47% |
| Ingo Molnar | 37 | 2.04% | 2 | 2.94% |
| Jeremy Fitzhardinge | 27 | 1.49% | 3 | 4.41% |
| Tejun Heo | 21 | 1.16% | 4 | 5.88% |
| Ido Yariv | 15 | 0.83% | 1 | 1.47% |
| Jan Beulich | 8 | 0.44% | 2 | 2.94% |
| Thomas Gleixner | 6 | 0.33% | 1 | 1.47% |
| Andi Kleen | 6 | 0.33% | 1 | 1.47% |
| H. Peter Anvin | 3 | 0.17% | 1 | 1.47% |
| Rusty Russell | 3 | 0.17% | 1 | 1.47% |
| Stas Sergeev | 2 | 0.11% | 1 | 1.47% |
| Kent Overstreet | 2 | 0.11% | 1 | 1.47% |
| Alex Shi | 1 | 0.06% | 1 | 1.47% |
| Greg Kroah-Hartman | 1 | 0.06% | 1 | 1.47% |
| Marcin Ślusarz | 1 | 0.06% | 1 | 1.47% |
| Linus Torvalds | 1 | 0.06% | 1 | 1.47% |
| Total | 1814 | 68 |
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_X86_PERCPU_H #define _ASM_X86_PERCPU_H #ifdef CONFIG_X86_64 # define __percpu_seg gs # define __percpu_rel (%rip) #else # define __percpu_seg fs # define __percpu_rel #endif #ifdef __ASSEMBLY__ #ifdef CONFIG_SMP # define __percpu %__percpu_seg: #else # define __percpu #endif #define PER_CPU_VAR(var) __percpu(var)__percpu_rel #ifdef CONFIG_X86_64_SMP # define INIT_PER_CPU_VAR(var) init_per_cpu__##var #else # define INIT_PER_CPU_VAR(var) var #endif #else /* !__ASSEMBLY__: */ #include <linux/build_bug.h> #include <linux/stringify.h> #include <asm/asm.h> #ifdef CONFIG_SMP #ifdef CONFIG_CC_HAS_NAMED_AS #ifdef __CHECKER__ # define __seg_gs __attribute__((address_space(__seg_gs))) # define __seg_fs __attribute__((address_space(__seg_fs))) #endif #ifdef CONFIG_X86_64 # define __percpu_seg_override __seg_gs #else # define __percpu_seg_override __seg_fs #endif #define __percpu_prefix "" #else /* !CONFIG_CC_HAS_NAMED_AS: */ #define __percpu_seg_override #define __percpu_prefix "%%"__stringify(__percpu_seg)":" #endif /* CONFIG_CC_HAS_NAMED_AS */ #define __force_percpu_prefix "%%"__stringify(__percpu_seg)":" #define __my_cpu_offset this_cpu_read(this_cpu_off) /* * Compared to the generic __my_cpu_offset version, the following * saves one instruction and avoids clobbering a temp register. * * arch_raw_cpu_ptr should not be used in 32-bit VDSO for a 64-bit * kernel, because games are played with CONFIG_X86_64 there and * sizeof(this_cpu_off) becames 4. */ #ifndef BUILD_VDSO32_64 #define arch_raw_cpu_ptr(_ptr) \ ({ \ unsigned long tcp_ptr__ = raw_cpu_read_long(this_cpu_off); \ \ tcp_ptr__ += (__force unsigned long)(_ptr); \ (typeof(*(_ptr)) __kernel __force *)tcp_ptr__; \ }) #else #define arch_raw_cpu_ptr(_ptr) ({ BUILD_BUG(); (typeof(_ptr))0; }) #endif #define PER_CPU_VAR(var) %__percpu_seg:(var)__percpu_rel #else /* !CONFIG_SMP: */ #define __percpu_seg_override #define __percpu_prefix "" #define __force_percpu_prefix "" #define PER_CPU_VAR(var) (var)__percpu_rel #endif /* CONFIG_SMP */ #define __my_cpu_type(var) typeof(var) __percpu_seg_override #define __my_cpu_ptr(ptr) (__my_cpu_type(*(ptr))*)(__force uintptr_t)(ptr) #define __my_cpu_var(var) (*__my_cpu_ptr(&(var))) #define __percpu_arg(x) __percpu_prefix "%" #x #define __force_percpu_arg(x) __force_percpu_prefix "%" #x /* * Initialized pointers to per-CPU variables needed for the boot * processor need to use these macros to get the proper address * offset from __per_cpu_load on SMP. * * There also must be an entry in vmlinux_64.lds.S */ #define DECLARE_INIT_PER_CPU(var) \ extern typeof(var) init_per_cpu_var(var) #ifdef CONFIG_X86_64_SMP # define init_per_cpu_var(var) init_per_cpu__##var #else # define init_per_cpu_var(var) var #endif /* * For arch-specific code, we can use direct single-insn ops (they * don't give an lvalue though). */ #define __pcpu_type_1 u8 #define __pcpu_type_2 u16 #define __pcpu_type_4 u32 #define __pcpu_type_8 u64 #define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff)) #define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff)) #define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff)) #define __pcpu_cast_8(val) ((u64)(val)) #define __pcpu_op1_1(op, dst) op "b " dst #define __pcpu_op1_2(op, dst) op "w " dst #define __pcpu_op1_4(op, dst) op "l " dst #define __pcpu_op1_8(op, dst) op "q " dst #define __pcpu_op2_1(op, src, dst) op "b " src ", " dst #define __pcpu_op2_2(op, src, dst) op "w " src ", " dst #define __pcpu_op2_4(op, src, dst) op "l " src ", " dst #define __pcpu_op2_8(op, src, dst) op "q " src ", " dst #define __pcpu_reg_1(mod, x) mod "q" (x) #define __pcpu_reg_2(mod, x) mod "r" (x) #define __pcpu_reg_4(mod, x) mod "r" (x) #define __pcpu_reg_8(mod, x) mod "r" (x) #define __pcpu_reg_imm_1(x) "qi" (x) #define __pcpu_reg_imm_2(x) "ri" (x) #define __pcpu_reg_imm_4(x) "ri" (x) #define __pcpu_reg_imm_8(x) "re" (x) #ifdef CONFIG_USE_X86_SEG_SUPPORT #define __raw_cpu_read(size, qual, pcp) \ ({ \ *(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)); \ }) #define __raw_cpu_write(size, qual, pcp, val) \ do { \ *(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)) = (val); \ } while (0) #define __raw_cpu_read_const(pcp) __raw_cpu_read(, , pcp) #else /* !CONFIG_USE_X86_SEG_SUPPORT: */ #define __raw_cpu_read(size, qual, _var) \ ({ \ __pcpu_type_##size pfo_val__; \ \ asm qual (__pcpu_op2_##size("mov", __percpu_arg([var]), "%[val]") \ : [val] __pcpu_reg_##size("=", pfo_val__) \ : [var] "m" (__my_cpu_var(_var))); \ \ (typeof(_var))(unsigned long) pfo_val__; \ }) #define __raw_cpu_write(size, qual, _var, _val) \ do { \ __pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val); \ \ if (0) { \ typeof(_var) pto_tmp__; \ pto_tmp__ = (_val); \ (void)pto_tmp__; \ } \ asm qual(__pcpu_op2_##size("mov", "%[val]", __percpu_arg([var])) \ : [var] "=m" (__my_cpu_var(_var)) \ : [val] __pcpu_reg_imm_##size(pto_val__)); \ } while (0) /* * The generic per-CPU infrastrucutre is not suitable for * reading const-qualified variables. */ #define __raw_cpu_read_const(pcp) ({ BUILD_BUG(); (typeof(pcp))0; }) #endif /* CONFIG_USE_X86_SEG_SUPPORT */ #define __raw_cpu_read_stable(size, _var) \ ({ \ __pcpu_type_##size pfo_val__; \ \ asm(__pcpu_op2_##size("mov", __force_percpu_arg(a[var]), "%[val]") \ : [val] __pcpu_reg_##size("=", pfo_val__) \ : [var] "i" (&(_var))); \ \ (typeof(_var))(unsigned long) pfo_val__; \ }) #define percpu_unary_op(size, qual, op, _var) \ ({ \ asm qual (__pcpu_op1_##size(op, __percpu_arg([var])) \ : [var] "+m" (__my_cpu_var(_var))); \ }) #define percpu_binary_op(size, qual, op, _var, _val) \ do { \ __pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val); \ \ if (0) { \ typeof(_var) pto_tmp__; \ pto_tmp__ = (_val); \ (void)pto_tmp__; \ } \ asm qual(__pcpu_op2_##size(op, "%[val]", __percpu_arg([var])) \ : [var] "+m" (__my_cpu_var(_var)) \ : [val] __pcpu_reg_imm_##size(pto_val__)); \ } while (0) /* * Generate a per-CPU add to memory instruction and optimize code * if one is added or subtracted. */ #define percpu_add_op(size, qual, var, val) \ do { \ const int pao_ID__ = (__builtin_constant_p(val) && \ ((val) == 1 || (val) == -1)) ? \ (int)(val) : 0; \ \ if (0) { \ typeof(var) pao_tmp__; \ pao_tmp__ = (val); \ (void)pao_tmp__; \ } \ if (pao_ID__ == 1) \ percpu_unary_op(size, qual, "inc", var); \ else if (pao_ID__ == -1) \ percpu_unary_op(size, qual, "dec", var); \ else \ percpu_binary_op(size, qual, "add", var, val); \ } while (0) /* * Add return operation */ #define percpu_add_return_op(size, qual, _var, _val) \ ({ \ __pcpu_type_##size paro_tmp__ = __pcpu_cast_##size(_val); \ \ asm qual (__pcpu_op2_##size("xadd", "%[tmp]", \ __percpu_arg([var])) \ : [tmp] __pcpu_reg_##size("+", paro_tmp__), \ [var] "+m" (__my_cpu_var(_var)) \ : : "memory"); \ (typeof(_var))(unsigned long) (paro_tmp__ + _val); \ }) /* * raw_cpu_xchg() can use a load-store since * it is not required to be IRQ-safe. */ #define raw_percpu_xchg_op(_var, _nval) \ ({ \ typeof(_var) pxo_old__ = raw_cpu_read(_var); \ \ raw_cpu_write(_var, _nval); \ \ pxo_old__; \ }) /* * this_cpu_xchg() is implemented using CMPXCHG without a LOCK prefix. * XCHG is expensive due to the implied LOCK prefix. The processor * cannot prefetch cachelines if XCHG is used. */ #define this_percpu_xchg_op(_var, _nval) \ ({ \ typeof(_var) pxo_old__ = this_cpu_read(_var); \ \ do { } while (!this_cpu_try_cmpxchg(_var, &pxo_old__, _nval)); \ \ pxo_old__; \ }) /* * CMPXCHG has no such implied lock semantics as a result it is much * more efficient for CPU-local operations. */ #define percpu_cmpxchg_op(size, qual, _var, _oval, _nval) \ ({ \ __pcpu_type_##size pco_old__ = __pcpu_cast_##size(_oval); \ __pcpu_type_##size pco_new__ = __pcpu_cast_##size(_nval); \ \ asm qual (__pcpu_op2_##size("cmpxchg", "%[nval]", \ __percpu_arg([var])) \ : [oval] "+a" (pco_old__), \ [var] "+m" (__my_cpu_var(_var)) \ : [nval] __pcpu_reg_##size(, pco_new__) \ : "memory"); \ \ (typeof(_var))(unsigned long) pco_old__; \ }) #define percpu_try_cmpxchg_op(size, qual, _var, _ovalp, _nval) \ ({ \ bool success; \ __pcpu_type_##size *pco_oval__ = (__pcpu_type_##size *)(_ovalp); \ __pcpu_type_##size pco_old__ = *pco_oval__; \ __pcpu_type_##size pco_new__ = __pcpu_cast_##size(_nval); \ \ asm qual (__pcpu_op2_##size("cmpxchg", "%[nval]", \ __percpu_arg([var])) \ CC_SET(z) \ : CC_OUT(z) (success), \ [oval] "+a" (pco_old__), \ [var] "+m" (__my_cpu_var(_var)) \ : [nval] __pcpu_reg_##size(, pco_new__) \ : "memory"); \ if (unlikely(!success)) \ *pco_oval__ = pco_old__; \ \ likely(success); \ }) #if defined(CONFIG_X86_32) && !defined(CONFIG_UML) #define percpu_cmpxchg64_op(size, qual, _var, _oval, _nval) \ ({ \ union { \ u64 var; \ struct { \ u32 low, high; \ }; \ } old__, new__; \ \ old__.var = _oval; \ new__.var = _nval; \ \ asm qual (ALTERNATIVE("call this_cpu_cmpxchg8b_emu", \ "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \ : [var] "+m" (__my_cpu_var(_var)), \ "+a" (old__.low), \ "+d" (old__.high) \ : "b" (new__.low), \ "c" (new__.high), \ "S" (&(_var)) \ : "memory"); \ \ old__.var; \ }) #define raw_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg64_op(8, , pcp, oval, nval) #define this_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg64_op(8, volatile, pcp, oval, nval) #define percpu_try_cmpxchg64_op(size, qual, _var, _ovalp, _nval) \ ({ \ bool success; \ u64 *_oval = (u64 *)(_ovalp); \ union { \ u64 var; \ struct { \ u32 low, high; \ }; \ } old__, new__; \ \ old__.var = *_oval; \ new__.var = _nval; \ \ asm qual (ALTERNATIVE("call this_cpu_cmpxchg8b_emu", \ "cmpxchg8b " __percpu_arg([var]), X86_FEATURE_CX8) \ CC_SET(z) \ : CC_OUT(z) (success), \ [var] "+m" (__my_cpu_var(_var)), \ "+a" (old__.low), \ "+d" (old__.high) \ : "b" (new__.low), \ "c" (new__.high), \ "S" (&(_var)) \ : "memory"); \ if (unlikely(!success)) \ *_oval = old__.var; \ \ likely(success); \ }) #define raw_cpu_try_cmpxchg64(pcp, ovalp, nval) percpu_try_cmpxchg64_op(8, , pcp, ovalp, nval) #define this_cpu_try_cmpxchg64(pcp, ovalp, nval) percpu_try_cmpxchg64_op(8, volatile, pcp, ovalp, nval) #endif /* defined(CONFIG_X86_32) && !defined(CONFIG_UML) */ #ifdef CONFIG_X86_64 #define raw_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg_op(8, , pcp, oval, nval); #define this_cpu_cmpxchg64(pcp, oval, nval) percpu_cmpxchg_op(8, volatile, pcp, oval, nval); #define raw_cpu_try_cmpxchg64(pcp, ovalp, nval) percpu_try_cmpxchg_op(8, , pcp, ovalp, nval); #define this_cpu_try_cmpxchg64(pcp, ovalp, nval) percpu_try_cmpxchg_op(8, volatile, pcp, ovalp, nval); #define percpu_cmpxchg128_op(size, qual, _var, _oval, _nval) \ ({ \ union { \ u128 var; \ struct { \ u64 low, high; \ }; \ } old__, new__; \ \ old__.var = _oval; \ new__.var = _nval; \ \ asm qual (ALTERNATIVE("call this_cpu_cmpxchg16b_emu", \ "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \ : [var] "+m" (__my_cpu_var(_var)), \ "+a" (old__.low), \ "+d" (old__.high) \ : "b" (new__.low), \ "c" (new__.high), \ "S" (&(_var)) \ : "memory"); \ \ old__.var; \ }) #define raw_cpu_cmpxchg128(pcp, oval, nval) percpu_cmpxchg128_op(16, , pcp, oval, nval) #define this_cpu_cmpxchg128(pcp, oval, nval) percpu_cmpxchg128_op(16, volatile, pcp, oval, nval) #define percpu_try_cmpxchg128_op(size, qual, _var, _ovalp, _nval) \ ({ \ bool success; \ u128 *_oval = (u128 *)(_ovalp); \ union { \ u128 var; \ struct { \ u64 low, high; \ }; \ } old__, new__; \ \ old__.var = *_oval; \ new__.var = _nval; \ \ asm qual (ALTERNATIVE("call this_cpu_cmpxchg16b_emu", \ "cmpxchg16b " __percpu_arg([var]), X86_FEATURE_CX16) \ CC_SET(z) \ : CC_OUT(z) (success), \ [var] "+m" (__my_cpu_var(_var)), \ "+a" (old__.low), \ "+d" (old__.high) \ : "b" (new__.low), \ "c" (new__.high), \ "S" (&(_var)) \ : "memory"); \ if (unlikely(!success)) \ *_oval = old__.var; \ likely(success); \ }) #define raw_cpu_try_cmpxchg128(pcp, ovalp, nval) percpu_try_cmpxchg128_op(16, , pcp, ovalp, nval) #define this_cpu_try_cmpxchg128(pcp, ovalp, nval) percpu_try_cmpxchg128_op(16, volatile, pcp, ovalp, nval) #endif /* CONFIG_X86_64 */ #define raw_cpu_read_1(pcp) __raw_cpu_read(1, , pcp) #define raw_cpu_read_2(pcp) __raw_cpu_read(2, , pcp) #define raw_cpu_read_4(pcp) __raw_cpu_read(4, , pcp) #define raw_cpu_write_1(pcp, val) __raw_cpu_write(1, , pcp, val) #define raw_cpu_write_2(pcp, val) __raw_cpu_write(2, , pcp, val) #define raw_cpu_write_4(pcp, val) __raw_cpu_write(4, , pcp, val) #define this_cpu_read_1(pcp) __raw_cpu_read(1, volatile, pcp) #define this_cpu_read_2(pcp) __raw_cpu_read(2, volatile, pcp) #define this_cpu_read_4(pcp) __raw_cpu_read(4, volatile, pcp) #define this_cpu_write_1(pcp, val) __raw_cpu_write(1, volatile, pcp, val) #define this_cpu_write_2(pcp, val) __raw_cpu_write(2, volatile, pcp, val) #define this_cpu_write_4(pcp, val) __raw_cpu_write(4, volatile, pcp, val) #define this_cpu_read_stable_1(pcp) __raw_cpu_read_stable(1, pcp) #define this_cpu_read_stable_2(pcp) __raw_cpu_read_stable(2, pcp) #define this_cpu_read_stable_4(pcp) __raw_cpu_read_stable(4, pcp) #define raw_cpu_add_1(pcp, val) percpu_add_op(1, , (pcp), val) #define raw_cpu_add_2(pcp, val) percpu_add_op(2, , (pcp), val) #define raw_cpu_add_4(pcp, val) percpu_add_op(4, , (pcp), val) #define raw_cpu_and_1(pcp, val) percpu_binary_op(1, , "and", (pcp), val) #define raw_cpu_and_2(pcp, val) percpu_binary_op(2, , "and", (pcp), val) #define raw_cpu_and_4(pcp, val) percpu_binary_op(4, , "and", (pcp), val) #define raw_cpu_or_1(pcp, val) percpu_binary_op(1, , "or", (pcp), val) #define raw_cpu_or_2(pcp, val) percpu_binary_op(2, , "or", (pcp), val) #define raw_cpu_or_4(pcp, val) percpu_binary_op(4, , "or", (pcp), val) #define raw_cpu_xchg_1(pcp, val) raw_percpu_xchg_op(pcp, val) #define raw_cpu_xchg_2(pcp, val) raw_percpu_xchg_op(pcp, val) #define raw_cpu_xchg_4(pcp, val) raw_percpu_xchg_op(pcp, val) #define this_cpu_add_1(pcp, val) percpu_add_op(1, volatile, (pcp), val) #define this_cpu_add_2(pcp, val) percpu_add_op(2, volatile, (pcp), val) #define this_cpu_add_4(pcp, val) percpu_add_op(4, volatile, (pcp), val) #define this_cpu_and_1(pcp, val) percpu_binary_op(1, volatile, "and", (pcp), val) #define this_cpu_and_2(pcp, val) percpu_binary_op(2, volatile, "and", (pcp), val) #define this_cpu_and_4(pcp, val) percpu_binary_op(4, volatile, "and", (pcp), val) #define this_cpu_or_1(pcp, val) percpu_binary_op(1, volatile, "or", (pcp), val) #define this_cpu_or_2(pcp, val) percpu_binary_op(2, volatile, "or", (pcp), val) #define this_cpu_or_4(pcp, val) percpu_binary_op(4, volatile, "or", (pcp), val) #define this_cpu_xchg_1(pcp, nval) this_percpu_xchg_op(pcp, nval) #define this_cpu_xchg_2(pcp, nval) this_percpu_xchg_op(pcp, nval) #define this_cpu_xchg_4(pcp, nval) this_percpu_xchg_op(pcp, nval) #define raw_cpu_add_return_1(pcp, val) percpu_add_return_op(1, , pcp, val) #define raw_cpu_add_return_2(pcp, val) percpu_add_return_op(2, , pcp, val) #define raw_cpu_add_return_4(pcp, val) percpu_add_return_op(4, , pcp, val) #define raw_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(1, , pcp, oval, nval) #define raw_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(2, , pcp, oval, nval) #define raw_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(4, , pcp, oval, nval) #define raw_cpu_try_cmpxchg_1(pcp, ovalp, nval) percpu_try_cmpxchg_op(1, , pcp, ovalp, nval) #define raw_cpu_try_cmpxchg_2(pcp, ovalp, nval) percpu_try_cmpxchg_op(2, , pcp, ovalp, nval) #define raw_cpu_try_cmpxchg_4(pcp, ovalp, nval) percpu_try_cmpxchg_op(4, , pcp, ovalp, nval) #define this_cpu_add_return_1(pcp, val) percpu_add_return_op(1, volatile, pcp, val) #define this_cpu_add_return_2(pcp, val) percpu_add_return_op(2, volatile, pcp, val) #define this_cpu_add_return_4(pcp, val) percpu_add_return_op(4, volatile, pcp, val) #define this_cpu_cmpxchg_1(pcp, oval, nval) percpu_cmpxchg_op(1, volatile, pcp, oval, nval) #define this_cpu_cmpxchg_2(pcp, oval, nval) percpu_cmpxchg_op(2, volatile, pcp, oval, nval) #define this_cpu_cmpxchg_4(pcp, oval, nval) percpu_cmpxchg_op(4, volatile, pcp, oval, nval) #define this_cpu_try_cmpxchg_1(pcp, ovalp, nval) percpu_try_cmpxchg_op(1, volatile, pcp, ovalp, nval) #define this_cpu_try_cmpxchg_2(pcp, ovalp, nval) percpu_try_cmpxchg_op(2, volatile, pcp, ovalp, nval) #define this_cpu_try_cmpxchg_4(pcp, ovalp, nval) percpu_try_cmpxchg_op(4, volatile, pcp, ovalp, nval) /* * Per-CPU atomic 64-bit operations are only available under 64-bit kernels. * 32-bit kernels must fall back to generic operations. */ #ifdef CONFIG_X86_64 #define raw_cpu_read_8(pcp) __raw_cpu_read(8, , pcp) #define raw_cpu_write_8(pcp, val) __raw_cpu_write(8, , pcp, val) #define this_cpu_read_8(pcp) __raw_cpu_read(8, volatile, pcp) #define this_cpu_write_8(pcp, val) __raw_cpu_write(8, volatile, pcp, val) #define this_cpu_read_stable_8(pcp) __raw_cpu_read_stable(8, pcp) #define raw_cpu_add_8(pcp, val) percpu_add_op(8, , (pcp), val) #define raw_cpu_and_8(pcp, val) percpu_binary_op(8, , "and", (pcp), val) #define raw_cpu_or_8(pcp, val) percpu_binary_op(8, , "or", (pcp), val) #define raw_cpu_add_return_8(pcp, val) percpu_add_return_op(8, , pcp, val) #define raw_cpu_xchg_8(pcp, nval) raw_percpu_xchg_op(pcp, nval) #define raw_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(8, , pcp, oval, nval) #define raw_cpu_try_cmpxchg_8(pcp, ovalp, nval) percpu_try_cmpxchg_op(8, , pcp, ovalp, nval) #define this_cpu_add_8(pcp, val) percpu_add_op(8, volatile, (pcp), val) #define this_cpu_and_8(pcp, val) percpu_binary_op(8, volatile, "and", (pcp), val) #define this_cpu_or_8(pcp, val) percpu_binary_op(8, volatile, "or", (pcp), val) #define this_cpu_add_return_8(pcp, val) percpu_add_return_op(8, volatile, pcp, val) #define this_cpu_xchg_8(pcp, nval) this_percpu_xchg_op(pcp, nval) #define this_cpu_cmpxchg_8(pcp, oval, nval) percpu_cmpxchg_op(8, volatile, pcp, oval, nval) #define this_cpu_try_cmpxchg_8(pcp, ovalp, nval) percpu_try_cmpxchg_op(8, volatile, pcp, ovalp, nval) #define raw_cpu_read_long(pcp) raw_cpu_read_8(pcp) #else /* !CONFIG_X86_64: */ /* There is no generic 64-bit read stable operation for 32-bit targets. */ #define this_cpu_read_stable_8(pcp) ({ BUILD_BUG(); (typeof(pcp))0; }) #define raw_cpu_read_long(pcp) raw_cpu_read_4(pcp) #endif /* CONFIG_X86_64 */ #define this_cpu_read_const(pcp) __raw_cpu_read_const(pcp) /* * this_cpu_read() makes the compiler load the per-CPU variable every time * it is accessed while this_cpu_read_stable() allows the value to be cached. * this_cpu_read_stable() is more efficient and can be used if its value * is guaranteed to be valid across CPUs. The current users include * pcpu_hot.current_task and pcpu_hot.top_of_stack, both of which are * actually per-thread variables implemented as per-CPU variables and * thus stable for the duration of the respective task. */ #define this_cpu_read_stable(pcp) __pcpu_size_call_return(this_cpu_read_stable_, pcp) #define x86_this_cpu_constant_test_bit(_nr, _var) \ ({ \ unsigned long __percpu *addr__ = \ (unsigned long __percpu *)&(_var) + ((_nr) / BITS_PER_LONG); \ \ !!((1UL << ((_nr) % BITS_PER_LONG)) & raw_cpu_read(*addr__)); \ }) #define x86_this_cpu_variable_test_bit(_nr, _var) \ ({ \ bool oldbit; \ \ asm volatile("btl %[nr], " __percpu_arg([var]) \ CC_SET(c) \ : CC_OUT(c) (oldbit) \ : [var] "m" (__my_cpu_var(_var)), \ [nr] "rI" (_nr)); \ oldbit; \ }) #define x86_this_cpu_test_bit(_nr, _var) \ (__builtin_constant_p(_nr) \ ? x86_this_cpu_constant_test_bit(_nr, _var) \ : x86_this_cpu_variable_test_bit(_nr, _var)) #include <asm-generic/percpu.h> /* We can use this directly for local CPU (faster). */ DECLARE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off); #endif /* !__ASSEMBLY__ */ #ifdef CONFIG_SMP /* * Define the "EARLY_PER_CPU" macros. These are used for some per_cpu * variables that are initialized and accessed before there are per_cpu * areas allocated. */ #define DEFINE_EARLY_PER_CPU(_type, _name, _initvalue) \ DEFINE_PER_CPU(_type, _name) = _initvalue; \ __typeof__(_type) _name##_early_map[NR_CPUS] __initdata = \ { [0 ... NR_CPUS-1] = _initvalue }; \ __typeof__(_type) *_name##_early_ptr __refdata = _name##_early_map #define DEFINE_EARLY_PER_CPU_READ_MOSTLY(_type, _name, _initvalue) \ DEFINE_PER_CPU_READ_MOSTLY(_type, _name) = _initvalue; \ __typeof__(_type) _name##_early_map[NR_CPUS] __initdata = \ { [0 ... NR_CPUS-1] = _initvalue }; \ __typeof__(_type) *_name##_early_ptr __refdata = _name##_early_map #define EXPORT_EARLY_PER_CPU_SYMBOL(_name) \ EXPORT_PER_CPU_SYMBOL(_name) #define DECLARE_EARLY_PER_CPU(_type, _name) \ DECLARE_PER_CPU(_type, _name); \ extern __typeof__(_type) *_name##_early_ptr; \ extern __typeof__(_type) _name##_early_map[] #define DECLARE_EARLY_PER_CPU_READ_MOSTLY(_type, _name) \ DECLARE_PER_CPU_READ_MOSTLY(_type, _name); \ extern __typeof__(_type) *_name##_early_ptr; \ extern __typeof__(_type) _name##_early_map[] #define early_per_cpu_ptr(_name) (_name##_early_ptr) #define early_per_cpu_map(_name, _idx) (_name##_early_map[_idx]) #define early_per_cpu(_name, _cpu) \ *(early_per_cpu_ptr(_name) ? \ &early_per_cpu_ptr(_name)[_cpu] : \ &per_cpu(_name, _cpu)) #else /* !CONFIG_SMP: */ #define DEFINE_EARLY_PER_CPU(_type, _name, _initvalue) \ DEFINE_PER_CPU(_type, _name) = _initvalue #define DEFINE_EARLY_PER_CPU_READ_MOSTLY(_type, _name, _initvalue) \ DEFINE_PER_CPU_READ_MOSTLY(_type, _name) = _initvalue #define EXPORT_EARLY_PER_CPU_SYMBOL(_name) \ EXPORT_PER_CPU_SYMBOL(_name) #define DECLARE_EARLY_PER_CPU(_type, _name) \ DECLARE_PER_CPU(_type, _name) #define DECLARE_EARLY_PER_CPU_READ_MOSTLY(_type, _name) \ DECLARE_PER_CPU_READ_MOSTLY(_type, _name) #define early_per_cpu(_name, _cpu) per_cpu(_name, _cpu) #define early_per_cpu_ptr(_name) NULL /* no early_per_cpu_map() */ #endif /* !CONFIG_SMP */ #endif /* _ASM_X86_PERCPU_H */
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1