---
name: "blk_rq_unmap_user"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/blk_rq_unmap_user"
---

# blk\_rq\_unmap\_user(9)

unmap a request with user data

## NAME

blk\_rq\_unmap\_user - unmap a request with user data

## SYNOPSIS

**int blk\_rq\_unmap\_user(struct bio \*** *bio***);**

## ARGUMENTS

*bio*

start of bio list

## DESCRIPTION

Unmap a rq previously mapped by **blk\_rq\_map\_user**. The caller must supply the original rq-\>bio from the **blk\_rq\_map\_user** return, since the I/O completion may have changed rq-\>bio.

## COPYRIGHT