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| author | Doug Anderson <dianders@chromium.org> | 2014-04-21 09:40:36 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-24 15:38:22 -0700 |
| commit | f94b0572683716f727b25086f8d39671506593ab (patch) | |
| tree | c1428aa4245d01149c008c70558b15a166c84d12 | |
| parent | ab88c8dc3bd667bcf21c8319165db92b930cf7e7 (diff) | |
| download | op-kernel-dev-f94b0572683716f727b25086f8d39671506593ab.zip op-kernel-dev-f94b0572683716f727b25086f8d39671506593ab.tar.gz | |
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>
| -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 12442748..1f5505e 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); } |
