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.TH "__COPY_FROM_USER" 9 "August 2005" "Kernel Hackers Manual" "LINUX"
.SH NAME
__copy_from_user_inatomic \- Copy a block of data from user space, with less checking.
.SH "SYNOPSIS"
.ad l
.hy 0
.HP 44
unsigned\ long\ \fB__copy_from_user_inatomic\ \fR\ (void\ *\ \fIto\fR, const\ void\ __user\ *\ \fIfrom\fR, unsigned\ long\ \fIn\fR);
.ad
.hy

.SH "ARGUMENTS"

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

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

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

.SH "CONTEXT"

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

.SH "DESCRIPTION"

.PP
Copy data from user space to kernel space\&. Caller must check the specified block with \fBaccess_ok\fR before calling this function\&.

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

.PP
If some data could not be copied, this function will pad the copied data to the requested size using zero bytes\&.