函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\io_uring.c Create Date:2022-07-29 10:55:11
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：io_sqe_buffer_unregister

函数原型：static int io_sqe_buffer_unregister(struct io_ring_ctx *ctx)

返回类型：int

参数：

类型参数名称
struct io_ring_ctx *ctx
4716  如果非user_bufs则返回:负ENXIO
4719  以i小于 if used, fixed mapped user buffers 循环
4720  imu等于user_bufs[i]
4722  以j小于nr_bvecs循环put_user_page() - release a gup-pinned page*@page: pointer to page to be released* Pages that were pinned via get_user_pages*() must be released via* either put_user_page(), or one of the put_user_pages*() routines* below
4725  如果account_mem则io_unaccount_mem(user, nr_bvecs)
4727  kvfree() - Free memory.*@addr: Pointer to allocated memory.* kvfree frees memory allocated by any of vmalloc(), kmalloc() or kvmalloc().* It is slightly more efficient to use kfree() or vfree() if you are certain* that you know which one to use.
4728  nr_bvecs等于0
4731  释放内存
4732  user_bufs = NULL
4733  if used, fixed mapped user buffers 等于0
4734  返回:0
调用者
名称描述
io_sqe_buffer_register
io_ring_ctx_free
__io_uring_register