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.TH "__GET_USER" 9 "August 2005" "Kernel Hackers Manual" "LINUX"
.SH NAME
__get_user \- Get a simple variable from user space, with less checking.
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 13
\fB__get_user\ \fR\ (\fIx\fR, \fIptr\fR);
.ad
.hy

.SH "ARGUMENTS"

.TP
\fIx\fR
Variable to store result\&.

.TP
\fIptr\fR
Source address, in user space\&.

.SH "CONTEXT"

.PP
User context only\&. This function may sleep\&.

.SH "DESCRIPTION"

.PP
This macro copies a single simple variable from user space to kernel space\&. It supports simple types like char and int, but not larger data types like structures or arrays\&.

.PP
 \fIptr\fR must have pointer\-to\-simple\-variable type, and the result of dereferencing \fIptr\fR must be assignable to \fIx\fR without a cast\&.

.PP
Caller must check the pointer with \fBaccess_ok\fR before calling this function\&.

.PP
Returns zero on success, or \-EFAULT on error\&. On error, the variable \fIx\fR is set to zero\&.