setup_per_cpu

函数名称：UP percpu area setup.* UP always uses km-based percpu allocator with identity mapping.* Static percpu variables are indistinguishable from the usual static* variables and don't require any special preparation.

函数原型：void __init setup_per_cpu_areas(void)

返回类型：void

参数：无

2993

unit_size等于undup_pow_of_two - round the given value up to nearest power of two*@n: parameter* round the given value up to the nearest power of two* - the result is undefined when n == 0* - this can be used to initialise global variables from constant data(max_t - return maximum of two values, using the specified type*@type: data type to use*@x: first value*@y: second value(size_t, minimum unit size, also is the maximum supported allocation size , PERCPU_DYNAMIC_RESERVE))

2999

ai等于pcpu_alloc_alloc_info - allocate percpu allocation info*@nr_groups: the number of groups*@nr_units: the number of units* Allocate ai which is large enough for @nr_groups groups containing*@nr_units units

3000

fc等于memblock_alloc_from(unit_size, PAGE_SIZE, __pa(The maximum address that we can perform a DMA transfer to on this platform ))

3001

如果非ai或非fc则panic - halt the system*@fmt: The text string to print* Display a message, then perform cleanups.* This function never returns.

3004

kmemleak_free(fc)

3006

dyn_size等于unit_size

3007

unit_size等于unit_size

3008

atom_size等于unit_size

3009

alloc_size等于unit_size

3010

aligned # of units 等于1

3011

unit->cpu map, empty * entries contain NR_CPUS [0]等于0

3013

pcpu_setup_first_chunk - initialize the first percpu chunk*@ai: pcpu_alloc_info describing how to percpu area is shaped*@base_addr: mapped address* Initialize the first percpu chunk which contains the kernel static* percpu area

3014

pcpu_free_alloc_info - free percpu allocation info*@ai: pcpu_alloc_info to free* Free @ai which was allocated by pcpu_alloc_alloc_info().

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