__clear_user

Langue: en

Autres versions - même langue

Version: June 2009 (debian - 07/07/09)

Section: 9 (Appels noyau Linux)

NAME

__clear_user - Zero a block of memory in user space, with less checking.

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. Caller must check the specified block with access_ok before calling this function.

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