Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:fs\io_uring.c Create Date:2022-07-28 20:22:21
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:io_sqe_buffer_unregister

Proto:static int io_sqe_buffer_unregister(struct io_ring_ctx *ctx)

Type:int

Parameter:

TypeParameterName
struct io_ring_ctx *ctx
4716  If Not user_bufs Then Return -ENXIO
4719  When i < if used, fixed mapped user buffers cycle
4720  imu = user_bufs[i]
4722  When j < nr_bvecs cycle 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  If account_mem Then 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 = 0
4731  kfree(user_bufs)
4732  user_bufs = NULL
4733  if used, fixed mapped user buffers = 0
4734  Return 0
Caller
NameDescribe
io_sqe_buffer_register
io_ring_ctx_free
__io_uring_register