clear_user
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## Name

clear_user — Zero a block of memory in user space.

## Synopsis

`unsigned long clear_user (` | void __user * to,
| unsigned long n`)`;

## Arguments

`to`

  Destination address, in user space.

`n`

  Number of bytes to zero.

## Description

Zero a block of memory in user space.

Returns number of bytes that could not be cleared. On success, this will be zero.

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