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(parent: ce74117) | patch
n_tty: Don't wrap input buffer indices at buffer size
authorPeter Hurley <peter@hurleysoftware.com>
Sat, 15 Jun 2013 13:14:21 +0000 (09:14 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 23 Jul 2013 23:43:00 +0000 (16:43 -0700)
commitbc5a5e3f45d047844830233fb95b19a95c864a0f
tree7d28526f720ac5460dde965c57d2fea1ed6410b3tree | snapshot (tar.gz zip)
parentce74117a1823431c86f5cb620fa852d21310feaccommit | diff
n_tty: Don't wrap input buffer indices at buffer size

Wrap read_buf indices (read_head, read_tail, canon_head) at
max representable value, instead of at the N_TTY_BUF_SIZE. This step
is necessary to allow lockless reads of these shared variables
(by updating the variables atomically).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/tty/n_tty.c diff | blob | blame | history