函数逻辑报告

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v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\percpu.c Create Date:2022-07-27 15:50:10
Last Modify:2022-05-23 13:52:24 Copyright©Brick
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函数名称：pcpu_next_md_free_region - finds the next hint free area*@chunk: chunk of interest*@bit_off: chunk offset*@bits: size of free area* Helper function for pcpu_for_each_md_free_region

函数原型：static void pcpu_next_md_free_region(struct pcpu_chunk *chunk, int *bit_off, int *bits)

返回类型：void

参数：

类型参数名称
struct pcpu_chunk *chunk
int *bit_off
int *bits
367  i等于pcpu_off_to_block_index( * bit_off)
368  block_off等于pcpu_off_to_block_off( * bit_off)
371  bits等于0
372  以i小于pcpu_chunk_nr_blocks - converts nr_pages to # of md_blocks*@chunk: chunk of interest* This conversion is from the number of physical pages that the chunk* serves to the number of bitmap blocks used.循环
375  如果bits则
376  bits加等于size of free space alongthe left side of the block
377  如果size of free space alongthe left side of the block 恒等于PCPU_BITMAP_BLOCK_BITS则继续下一循环
379  返回
390  bits等于contig hint for block
391  如果bits且lock relative startingposition of the contig hint 大于等于block_off且bits加lock relative startingposition of the contig hint 小于PCPU_BITMAP_BLOCK_BITS则
393  bit_off等于pcpu_block_off_to_off(i, lock relative startingposition of the contig hint )
395  返回
398  block_off等于0
400  bits等于size of free space alongthe right side of the block
401  bit_off等于i加1的和乘PCPU_BITMAP_BLOCK_BITS减size of free space alongthe right side of the block