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| author | Peter Hurley <peter@hurleysoftware.com> | 2015-11-27 22:11:03 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-14 06:59:48 +0300 |
| commit | e661cf702003030daf2001cb88eb586300a18ee4 (patch) | |
| tree | 92407126f080b4821d76155eb2cbb83d6649fc76 | |
| parent | 679e7c2999f963e542c6f4c3d3c9a0688b5d3587 (diff) | |
| download | linux-e661cf702003030daf2001cb88eb586300a18ee4.tar.xz | |
n_tty: Clarify copy_from_read_buf()
Add a temporary for the computed source address and substitute
where appropriate. No functional change.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/tty/n_tty.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index b2b01d5439b7..bc613b868e71 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -2014,11 +2014,11 @@ static int copy_from_read_buf(struct tty_struct *tty, n = min(head - ldata->read_tail, N_TTY_BUF_SIZE - tail); n = min(*nr, n); if (n) { - retval = copy_to_user(*b, read_buf_addr(ldata, tail), n); + const unsigned char *from = read_buf_addr(ldata, tail); + retval = copy_to_user(*b, from, n); n -= retval; - is_eof = n == 1 && read_buf(ldata, tail) == EOF_CHAR(tty); - tty_audit_add_data(tty, read_buf_addr(ldata, tail), n, - ldata->icanon); + is_eof = n == 1 && *from == EOF_CHAR(tty); + tty_audit_add_data(tty, from, n, ldata->icanon); smp_store_release(&ldata->read_tail, ldata->read_tail + n); /* Turn single EOF into zero-length read */ if (L_EXTPROC(tty) && ldata->icanon && is_eof && |