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| author | Peter Hurley <peter@hurleysoftware.com> | 2013-06-15 10:04:24 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-07-23 17:02:21 -0700 |
| commit | 17bd79074003d73f2207289b9d3ce0553d000856 (patch) | |
| tree | 51247dfd99d2d62693c08e84a85ad0882c0f8d82 /include/linux/stacktrace.h | |
| parent | 862eeffef1b465a12412f4ae6e5987ae292c968d (diff) | |
n_tty: Remove echo_lock
Adding data to echo_buf (via add_echo_byte()) is guaranteed to be
single-threaded, since all callers are from the n_tty_receive_buf()
path. Processing the echo_buf can be called from either the
n_tty_receive_buf() path or the n_tty_write() path; however, these
callers are already serialized by output_lock.
Publish cumulative echo_head changes to echo_commit; process echo_buf
from echo_tail to echo_commit; remove echo_lock.
On echo_buf overrun, claim output_lock to serialize changes to
echo_tail.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/stacktrace.h')
0 files changed, 0 insertions, 0 deletions