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Commit f94b0572 authored by Doug Anderson's avatar Doug Anderson Committed by Greg Kroah-Hartman
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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: default avatarDoug Anderson <dianders@chromium.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ab88c8dc

drivers/tty/serial/samsung.c

+1 −1
Original line number Diff line number Diff line
@@ -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);

}