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| author |   Peter Hurley <peter@hurleysoftware.com> | 2013-06-15 09:14:21 -0400 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-23 16:43:00 -0700 |
| commit | bc5a5e3f45d047844830233fb95b19a95c864a0f (patch) | |
| tree | 7d28526f720ac5460dde965c57d2fea1ed6410b3 /include/linux/tty.h | |
| parent | n_tty: Get read_cnt through accessor (diff) | |
| download | linux-dev-bc5a5e3f45d047844830233fb95b19a95c864a0f.tar.xz linux-dev-bc5a5e3f45d047844830233fb95b19a95c864a0f.zip | |
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>
Diffstat (limited to 'include/linux/tty.h')
0 files changed, 0 insertions, 0 deletions