mirror of
https://github.com/torvalds/linux.git
synced 2026-05-24 07:03:03 +02:00
x86/percpu changes for v6.11:
- Enable the named address spaces based percpu accessors optimization
on all GCC versions that contain this feature, detected through
a build-time testcase. This effectively enables the feature on
GCC 6, GCC 7 and GCC 8 versions.
- Fix operand constraint modifier in __raw_cpu_write()
- Reorganize the per-CPU headers for better readability
- Misc cleanups and fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-percpu-2024-07-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 percpu updates from Ingo Molnar:
- Enable the named address spaces based percpu accessors optimization
on all GCC versions that contain this feature, detected through a
build-time testcase.
This effectively enables the feature on GCC 6, GCC 7 and GCC 8
versions.
- Fix operand constraint modifier in __raw_cpu_write()
- Reorganize the per-CPU headers for better readability
- Misc cleanups and fixes
* tag 'x86-percpu-2024-07-17' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/percpu: Enable named address spaces for all capable GCC versions
x86/percpu: Clean up <asm/percpu.h> vertical alignment details
x86/percpu: Clean up <asm/percpu.h> a bit
x86/percpu: Move some percpu accessors around to reduce ifdeffery
x86/percpu: Rename percpu_stable_op() to __raw_cpu_read_stable()
x86/percpu: Fix operand constraint modifier in __raw_cpu_write()
x86/percpu: Introduce the __raw_cpu_read_const() macro
x86/percpu: Unify percpu read-write accessors
x86/percpu: Move some percpu macros around for readability
x86/percpu: Introduce the pcpu_binary_op() macro
This commit is contained in:
Linus Torvalds
commit
dde1a0e162
|
|
@ -2428,7 +2428,8 @@ source "kernel/livepatch/Kconfig"
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endmenu
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|
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config CC_HAS_NAMED_AS
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def_bool CC_IS_GCC && GCC_VERSION >= 90100
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def_bool $(success,echo 'int __seg_fs fs; int __seg_gs gs;' | $(CC) -x c - -S -o /dev/null)
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depends on CC_IS_GCC
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config CC_HAS_NAMED_AS_FIXED_SANITIZERS
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def_bool CC_IS_GCC && GCC_VERSION >= 130300
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|
|
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|
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@ -3,30 +3,30 @@
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#define _ASM_X86_PERCPU_H
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#ifdef CONFIG_X86_64
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#define __percpu_seg gs
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#define __percpu_rel (%rip)
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# define __percpu_seg gs
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# define __percpu_rel (%rip)
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#else
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#define __percpu_seg fs
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#define __percpu_rel
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# define __percpu_seg fs
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# define __percpu_rel
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#endif
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#ifdef __ASSEMBLY__
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#ifdef CONFIG_SMP
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#define __percpu %__percpu_seg:
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# define __percpu %__percpu_seg:
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#else
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#define __percpu
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# define __percpu
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#endif
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#define PER_CPU_VAR(var) __percpu(var)__percpu_rel
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#ifdef CONFIG_X86_64_SMP
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#define INIT_PER_CPU_VAR(var) init_per_cpu__##var
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# define INIT_PER_CPU_VAR(var) init_per_cpu__##var
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#else
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#define INIT_PER_CPU_VAR(var) var
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# define INIT_PER_CPU_VAR(var) var
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#endif
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#else /* ...!ASSEMBLY */
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#else /* !__ASSEMBLY__: */
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#include <linux/build_bug.h>
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#include <linux/stringify.h>
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@ -37,19 +37,19 @@
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#ifdef CONFIG_CC_HAS_NAMED_AS
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#ifdef __CHECKER__
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#define __seg_gs __attribute__((address_space(__seg_gs)))
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#define __seg_fs __attribute__((address_space(__seg_fs)))
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# define __seg_gs __attribute__((address_space(__seg_gs)))
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# define __seg_fs __attribute__((address_space(__seg_fs)))
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#endif
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#ifdef CONFIG_X86_64
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#define __percpu_seg_override __seg_gs
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# define __percpu_seg_override __seg_gs
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#else
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#define __percpu_seg_override __seg_fs
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# define __percpu_seg_override __seg_fs
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#endif
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#define __percpu_prefix ""
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#else /* CONFIG_CC_HAS_NAMED_AS */
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#else /* !CONFIG_CC_HAS_NAMED_AS: */
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#define __percpu_seg_override
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#define __percpu_prefix "%%"__stringify(__percpu_seg)":"
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@ -68,11 +68,12 @@
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* sizeof(this_cpu_off) becames 4.
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*/
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#ifndef BUILD_VDSO32_64
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#define arch_raw_cpu_ptr(_ptr) \
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({ \
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unsigned long tcp_ptr__ = raw_cpu_read_long(this_cpu_off); \
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tcp_ptr__ += (__force unsigned long)(_ptr); \
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(typeof(*(_ptr)) __kernel __force *)tcp_ptr__; \
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#define arch_raw_cpu_ptr(_ptr) \
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({ \
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unsigned long tcp_ptr__ = raw_cpu_read_long(this_cpu_off); \
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\
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tcp_ptr__ += (__force unsigned long)(_ptr); \
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(typeof(*(_ptr)) __kernel __force *)tcp_ptr__; \
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})
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#else
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#define arch_raw_cpu_ptr(_ptr) ({ BUILD_BUG(); (typeof(_ptr))0; })
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@ -80,7 +81,8 @@
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#define PER_CPU_VAR(var) %__percpu_seg:(var)__percpu_rel
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#else /* CONFIG_SMP */
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#else /* !CONFIG_SMP: */
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#define __percpu_seg_override
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#define __percpu_prefix ""
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#define __force_percpu_prefix ""
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|
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@ -96,7 +98,7 @@
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#define __force_percpu_arg(x) __force_percpu_prefix "%" #x
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|
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/*
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* Initialized pointers to per-cpu variables needed for the boot
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* Initialized pointers to per-CPU variables needed for the boot
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* processor need to use these macros to get the proper address
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* offset from __per_cpu_load on SMP.
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*
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|
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@ -106,47 +108,116 @@
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extern typeof(var) init_per_cpu_var(var)
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#ifdef CONFIG_X86_64_SMP
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#define init_per_cpu_var(var) init_per_cpu__##var
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# define init_per_cpu_var(var) init_per_cpu__##var
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#else
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#define init_per_cpu_var(var) var
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# define init_per_cpu_var(var) var
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#endif
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|
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/* For arch-specific code, we can use direct single-insn ops (they
|
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* don't give an lvalue though). */
|
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/*
|
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* For arch-specific code, we can use direct single-insn ops (they
|
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* don't give an lvalue though).
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*/
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|
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#define __pcpu_type_1 u8
|
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#define __pcpu_type_2 u16
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#define __pcpu_type_4 u32
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#define __pcpu_type_8 u64
|
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#define __pcpu_type_1 u8
|
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#define __pcpu_type_2 u16
|
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#define __pcpu_type_4 u32
|
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#define __pcpu_type_8 u64
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#define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff))
|
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#define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff))
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#define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff))
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#define __pcpu_cast_8(val) ((u64)(val))
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#define __pcpu_cast_1(val) ((u8)(((unsigned long) val) & 0xff))
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#define __pcpu_cast_2(val) ((u16)(((unsigned long) val) & 0xffff))
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#define __pcpu_cast_4(val) ((u32)(((unsigned long) val) & 0xffffffff))
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#define __pcpu_cast_8(val) ((u64)(val))
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|
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#define __pcpu_op1_1(op, dst) op "b " dst
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#define __pcpu_op1_2(op, dst) op "w " dst
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#define __pcpu_op1_4(op, dst) op "l " dst
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#define __pcpu_op1_8(op, dst) op "q " dst
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#define __pcpu_op1_1(op, dst) op "b " dst
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#define __pcpu_op1_2(op, dst) op "w " dst
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#define __pcpu_op1_4(op, dst) op "l " dst
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#define __pcpu_op1_8(op, dst) op "q " dst
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|
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#define __pcpu_op2_1(op, src, dst) op "b " src ", " dst
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#define __pcpu_op2_2(op, src, dst) op "w " src ", " dst
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#define __pcpu_op2_4(op, src, dst) op "l " src ", " dst
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#define __pcpu_op2_8(op, src, dst) op "q " src ", " dst
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#define __pcpu_reg_1(mod, x) mod "q" (x)
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#define __pcpu_reg_2(mod, x) mod "r" (x)
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#define __pcpu_reg_4(mod, x) mod "r" (x)
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#define __pcpu_reg_8(mod, x) mod "r" (x)
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#define __pcpu_reg_1(mod, x) mod "q" (x)
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#define __pcpu_reg_2(mod, x) mod "r" (x)
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#define __pcpu_reg_4(mod, x) mod "r" (x)
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#define __pcpu_reg_8(mod, x) mod "r" (x)
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#define __pcpu_reg_imm_1(x) "qi" (x)
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#define __pcpu_reg_imm_2(x) "ri" (x)
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#define __pcpu_reg_imm_4(x) "ri" (x)
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#define __pcpu_reg_imm_8(x) "re" (x)
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#define __pcpu_reg_imm_1(x) "qi" (x)
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#define __pcpu_reg_imm_2(x) "ri" (x)
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#define __pcpu_reg_imm_4(x) "ri" (x)
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#define __pcpu_reg_imm_8(x) "re" (x)
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#define percpu_to_op(size, qual, op, _var, _val) \
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#ifdef CONFIG_USE_X86_SEG_SUPPORT
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#define __raw_cpu_read(size, qual, pcp) \
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({ \
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*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)); \
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})
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#define __raw_cpu_write(size, qual, pcp, val) \
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do { \
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*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)) = (val); \
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} while (0)
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#define __raw_cpu_read_const(pcp) __raw_cpu_read(, , pcp)
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#else /* !CONFIG_USE_X86_SEG_SUPPORT: */
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#define __raw_cpu_read(size, qual, _var) \
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({ \
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__pcpu_type_##size pfo_val__; \
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\
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asm qual (__pcpu_op2_##size("mov", __percpu_arg([var]), "%[val]") \
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: [val] __pcpu_reg_##size("=", pfo_val__) \
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: [var] "m" (__my_cpu_var(_var))); \
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\
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(typeof(_var))(unsigned long) pfo_val__; \
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})
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#define __raw_cpu_write(size, qual, _var, _val) \
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do { \
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__pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val); \
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\
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if (0) { \
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typeof(_var) pto_tmp__; \
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pto_tmp__ = (_val); \
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(void)pto_tmp__; \
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} \
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asm qual(__pcpu_op2_##size("mov", "%[val]", __percpu_arg([var])) \
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: [var] "=m" (__my_cpu_var(_var)) \
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: [val] __pcpu_reg_imm_##size(pto_val__)); \
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} while (0)
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/*
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* The generic per-CPU infrastrucutre is not suitable for
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* reading const-qualified variables.
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*/
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#define __raw_cpu_read_const(pcp) ({ BUILD_BUG(); (typeof(pcp))0; })
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#endif /* CONFIG_USE_X86_SEG_SUPPORT */
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#define __raw_cpu_read_stable(size, _var) \
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({ \
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__pcpu_type_##size pfo_val__; \
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\
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asm(__pcpu_op2_##size("mov", __force_percpu_arg(a[var]), "%[val]") \
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: [val] __pcpu_reg_##size("=", pfo_val__) \
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: [var] "i" (&(_var))); \
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\
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(typeof(_var))(unsigned long) pfo_val__; \
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})
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#define percpu_unary_op(size, qual, op, _var) \
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({ \
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asm qual (__pcpu_op1_##size(op, __percpu_arg([var])) \
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: [var] "+m" (__my_cpu_var(_var))); \
|
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})
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|
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#define percpu_binary_op(size, qual, op, _var, _val) \
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do { \
|
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__pcpu_type_##size pto_val__ = __pcpu_cast_##size(_val); \
|
||||
\
|
||||
if (0) { \
|
||||
typeof(_var) pto_tmp__; \
|
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pto_tmp__ = (_val); \
|
||||
|
|
@ -157,14 +228,8 @@ do { \
|
|||
: [val] __pcpu_reg_imm_##size(pto_val__)); \
|
||||
} while (0)
|
||||
|
||||
#define percpu_unary_op(size, qual, op, _var) \
|
||||
({ \
|
||||
asm qual (__pcpu_op1_##size(op, __percpu_arg([var])) \
|
||||
: [var] "+m" (__my_cpu_var(_var))); \
|
||||
})
|
||||
|
||||
/*
|
||||
* Generate a percpu add to memory instruction and optimize code
|
||||
* 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) \
|
||||
|
|
@ -172,6 +237,7 @@ 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); \
|
||||
|
|
@ -182,33 +248,16 @@ do { \
|
|||
else if (pao_ID__ == -1) \
|
||||
percpu_unary_op(size, qual, "dec", var); \
|
||||
else \
|
||||
percpu_to_op(size, qual, "add", var, val); \
|
||||
percpu_binary_op(size, qual, "add", var, val); \
|
||||
} while (0)
|
||||
|
||||
#define percpu_from_op(size, qual, op, _var) \
|
||||
({ \
|
||||
__pcpu_type_##size pfo_val__; \
|
||||
asm qual (__pcpu_op2_##size(op, __percpu_arg([var]), "%[val]") \
|
||||
: [val] __pcpu_reg_##size("=", pfo_val__) \
|
||||
: [var] "m" (__my_cpu_var(_var))); \
|
||||
(typeof(_var))(unsigned long) pfo_val__; \
|
||||
})
|
||||
|
||||
#define percpu_stable_op(size, op, _var) \
|
||||
({ \
|
||||
__pcpu_type_##size pfo_val__; \
|
||||
asm(__pcpu_op2_##size(op, __force_percpu_arg(a[var]), "%[val]") \
|
||||
: [val] __pcpu_reg_##size("=", pfo_val__) \
|
||||
: [var] "i" (&(_var))); \
|
||||
(typeof(_var))(unsigned long) pfo_val__; \
|
||||
})
|
||||
|
||||
/*
|
||||
* 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__), \
|
||||
|
|
@ -224,36 +273,42 @@ do { \
|
|||
#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.
|
||||
* 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.
|
||||
* 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__; \
|
||||
})
|
||||
|
||||
|
|
@ -263,6 +318,7 @@ do { \
|
|||
__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) \
|
||||
|
|
@ -273,10 +329,12 @@ do { \
|
|||
: "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 { \
|
||||
|
|
@ -302,8 +360,8 @@ do { \
|
|||
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 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) \
|
||||
({ \
|
||||
|
|
@ -332,16 +390,18 @@ do { \
|
|||
: "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
|
||||
|
||||
#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_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);
|
||||
|
|
@ -371,8 +431,8 @@ do { \
|
|||
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 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) \
|
||||
({ \
|
||||
|
|
@ -406,188 +466,150 @@ do { \
|
|||
|
||||
#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
|
||||
|
||||
/*
|
||||
* this_cpu_read() makes gcc load the percpu 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)
|
||||
#endif /* CONFIG_X86_64 */
|
||||
|
||||
#ifdef CONFIG_USE_X86_SEG_SUPPORT
|
||||
#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 __raw_cpu_read(qual, pcp) \
|
||||
({ \
|
||||
*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)); \
|
||||
})
|
||||
#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 __raw_cpu_write(qual, pcp, val) \
|
||||
do { \
|
||||
*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)) = (val); \
|
||||
} while (0)
|
||||
#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_read_1(pcp) __raw_cpu_read(, pcp)
|
||||
#define raw_cpu_read_2(pcp) __raw_cpu_read(, pcp)
|
||||
#define raw_cpu_read_4(pcp) __raw_cpu_read(, pcp)
|
||||
#define raw_cpu_write_1(pcp, val) __raw_cpu_write(, pcp, val)
|
||||
#define raw_cpu_write_2(pcp, val) __raw_cpu_write(, pcp, val)
|
||||
#define raw_cpu_write_4(pcp, val) __raw_cpu_write(, pcp, val)
|
||||
#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_read_1(pcp) __raw_cpu_read(volatile, pcp)
|
||||
#define this_cpu_read_2(pcp) __raw_cpu_read(volatile, pcp)
|
||||
#define this_cpu_read_4(pcp) __raw_cpu_read(volatile, pcp)
|
||||
#define this_cpu_write_1(pcp, val) __raw_cpu_write(volatile, pcp, val)
|
||||
#define this_cpu_write_2(pcp, val) __raw_cpu_write(volatile, pcp, val)
|
||||
#define this_cpu_write_4(pcp, val) __raw_cpu_write(volatile, 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)
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
#define raw_cpu_read_8(pcp) __raw_cpu_read(, pcp)
|
||||
#define raw_cpu_write_8(pcp, val) __raw_cpu_write(, pcp, val)
|
||||
#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_read_8(pcp) __raw_cpu_read(volatile, pcp)
|
||||
#define this_cpu_write_8(pcp, val) __raw_cpu_write(volatile, pcp, val)
|
||||
#endif
|
||||
|
||||
#define this_cpu_read_const(pcp) __raw_cpu_read(, pcp)
|
||||
#else /* CONFIG_USE_X86_SEG_SUPPORT */
|
||||
|
||||
#define raw_cpu_read_1(pcp) percpu_from_op(1, , "mov", pcp)
|
||||
#define raw_cpu_read_2(pcp) percpu_from_op(2, , "mov", pcp)
|
||||
#define raw_cpu_read_4(pcp) percpu_from_op(4, , "mov", pcp)
|
||||
#define raw_cpu_write_1(pcp, val) percpu_to_op(1, , "mov", (pcp), val)
|
||||
#define raw_cpu_write_2(pcp, val) percpu_to_op(2, , "mov", (pcp), val)
|
||||
#define raw_cpu_write_4(pcp, val) percpu_to_op(4, , "mov", (pcp), val)
|
||||
|
||||
#define this_cpu_read_1(pcp) percpu_from_op(1, volatile, "mov", pcp)
|
||||
#define this_cpu_read_2(pcp) percpu_from_op(2, volatile, "mov", pcp)
|
||||
#define this_cpu_read_4(pcp) percpu_from_op(4, volatile, "mov", pcp)
|
||||
#define this_cpu_write_1(pcp, val) percpu_to_op(1, volatile, "mov", (pcp), val)
|
||||
#define this_cpu_write_2(pcp, val) percpu_to_op(2, volatile, "mov", (pcp), val)
|
||||
#define this_cpu_write_4(pcp, val) percpu_to_op(4, volatile, "mov", (pcp), val)
|
||||
|
||||
#ifdef CONFIG_X86_64
|
||||
#define raw_cpu_read_8(pcp) percpu_from_op(8, , "mov", pcp)
|
||||
#define raw_cpu_write_8(pcp, val) percpu_to_op(8, , "mov", (pcp), val)
|
||||
|
||||
#define this_cpu_read_8(pcp) percpu_from_op(8, volatile, "mov", pcp)
|
||||
#define this_cpu_write_8(pcp, val) percpu_to_op(8, volatile, "mov", (pcp), val)
|
||||
#endif
|
||||
|
||||
/*
|
||||
* The generic per-cpu infrastrucutre is not suitable for
|
||||
* reading const-qualified variables.
|
||||
*/
|
||||
#define this_cpu_read_const(pcp) ({ BUILD_BUG(); (typeof(pcp))0; })
|
||||
#endif /* CONFIG_USE_X86_SEG_SUPPORT */
|
||||
|
||||
#define this_cpu_read_stable_1(pcp) percpu_stable_op(1, "mov", pcp)
|
||||
#define this_cpu_read_stable_2(pcp) percpu_stable_op(2, "mov", pcp)
|
||||
#define this_cpu_read_stable_4(pcp) percpu_stable_op(4, "mov", 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_to_op(1, , "and", (pcp), val)
|
||||
#define raw_cpu_and_2(pcp, val) percpu_to_op(2, , "and", (pcp), val)
|
||||
#define raw_cpu_and_4(pcp, val) percpu_to_op(4, , "and", (pcp), val)
|
||||
#define raw_cpu_or_1(pcp, val) percpu_to_op(1, , "or", (pcp), val)
|
||||
#define raw_cpu_or_2(pcp, val) percpu_to_op(2, , "or", (pcp), val)
|
||||
#define raw_cpu_or_4(pcp, val) percpu_to_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_to_op(1, volatile, "and", (pcp), val)
|
||||
#define this_cpu_and_2(pcp, val) percpu_to_op(2, volatile, "and", (pcp), val)
|
||||
#define this_cpu_and_4(pcp, val) percpu_to_op(4, volatile, "and", (pcp), val)
|
||||
#define this_cpu_or_1(pcp, val) percpu_to_op(1, volatile, "or", (pcp), val)
|
||||
#define this_cpu_or_2(pcp, val) percpu_to_op(2, volatile, "or", (pcp), val)
|
||||
#define this_cpu_or_4(pcp, val) percpu_to_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_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.
|
||||
* 32 bit must fall back to generic operations.
|
||||
* 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 this_cpu_read_stable_8(pcp) percpu_stable_op(8, "mov", pcp)
|
||||
|
||||
#define raw_cpu_add_8(pcp, val) percpu_add_op(8, , (pcp), val)
|
||||
#define raw_cpu_and_8(pcp, val) percpu_to_op(8, , "and", (pcp), val)
|
||||
#define raw_cpu_or_8(pcp, val) percpu_to_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 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_add_8(pcp, val) percpu_add_op(8, volatile, (pcp), val)
|
||||
#define this_cpu_and_8(pcp, val) percpu_to_op(8, volatile, "and", (pcp), val)
|
||||
#define this_cpu_or_8(pcp, val) percpu_to_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_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
|
||||
/* 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_8(pcp)
|
||||
|
||||
#define raw_cpu_read_long(pcp) raw_cpu_read_4(pcp)
|
||||
#endif
|
||||
#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_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) \
|
||||
#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))
|
||||
|
||||
|
||||
|
|
@ -618,46 +640,47 @@ DECLARE_PER_CPU_READ_MOSTLY(unsigned long, this_cpu_off);
|
|||
{ [0 ... NR_CPUS-1] = _initvalue }; \
|
||||
__typeof__(_type) *_name##_early_ptr __refdata = _name##_early_map
|
||||
|
||||
#define EXPORT_EARLY_PER_CPU_SYMBOL(_name) \
|
||||
#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; \
|
||||
#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; \
|
||||
#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] : \
|
||||
#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) \
|
||||
#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) \
|
||||
#define EXPORT_EARLY_PER_CPU_SYMBOL(_name) \
|
||||
EXPORT_PER_CPU_SYMBOL(_name)
|
||||
|
||||
#define DECLARE_EARLY_PER_CPU(_type, _name) \
|
||||
#define DECLARE_EARLY_PER_CPU(_type, _name) \
|
||||
DECLARE_PER_CPU(_type, _name)
|
||||
|
||||
#define DECLARE_EARLY_PER_CPU_READ_MOSTLY(_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
|
||||
#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 /* !CONFIG_SMP */
|
||||
|
||||
#endif /* _ASM_X86_PERCPU_H */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user