diff options
| author | Doug Anderson <dianders@chromium.org> | 2014-04-21 18:40:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-25 00:38:22 +0200 |
| commit | f94b0572683716f727b25086f8d39671506593ab (patch) | |
| tree | c1428aa4245d01149c008c70558b15a166c84d12 /drivers/tty/serial/samsung.c | |
| parent | serial: samsung: don't check config for every character (diff) | |
| download | linux-f94b0572683716f727b25086f8d39671506593ab.tar.xz linux-f94b0572683716f727b25086f8d39671506593ab.zip | |
serial: samsung: Change barrier() to cpu_relax() in console output
The two functions to write out to the console (one used in normal
console mode and one in polling console mode) were slightly different.
One used a barrier() in its loop and the other a cpu_relax(). The
barrier() really doesn't do anything since we're using rd_regl() to
read the port anyway. Switch it to cpu_relax() to make things
consistent.
No known bugs / issues are fixed by this change--it just makes things
more consistent.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to '')
| -rw-r--r-- | drivers/tty/serial/samsung.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 12442748d69f..1f5505e7f90d 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1466,7 +1466,7 @@ s3c24xx_serial_console_putchar(struct uart_port *port, int ch) unsigned int ufcon = rd_regl(port, S3C2410_UFCON); while (!s3c24xx_serial_console_txrdy(port, ufcon)) - barrier(); + cpu_relax(); wr_regb(port, S3C2410_UTXH, ch); } |