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.TH "__CLEAR_USER" 9 "August 2005" "Kernel Hackers Manual" "LINUX"
.SH NAME
__clear_user \- Zero a block of memory in user space, with less checking.
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 31
unsigned\ long\ \fB__clear_user\ \fR\ (void\ __user\ *\ \fIto\fR, unsigned\ long\ \fIn\fR);
.ad
.hy

.SH "ARGUMENTS"

.TP
\fIto\fR
Destination address, in user space\&.

.TP
\fIn\fR
Number of bytes to zero\&.

.SH "DESCRIPTION"

.PP
Zero a block of memory in user space\&. Caller must check the specified block with \fBaccess_ok\fR before calling this function\&.

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