Hi Daniel, On 09/02/2014 03:00 PM, Daniel Thompson wrote:
The architectures where this peripheral exists (ARM and SH) have expensive implementations of writel(), reliant on spin locks and explicit L2 cache management. These architectures provide a cheaper writel_relaxed() which is much better suited to peripherals that do not perform DMA. The situation with readl()/readl_relaxed()is similar although less acute. This driver does not use DMA and will be more power efficient and more robust (due to absense of spin locks during console I/O) if it uses the relaxed variants. This change means the driver is no longer portable and therefore no longer suitable for compile testing. Signed-off-by: Daniel Thompson <daniel.thompson@xxxxxxxxxx> Cc: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxx> Cc: Maxime Coquelin <maxime.coquelin@xxxxxx> Cc: Patrice Chotard <patrice.chotard@xxxxxx> Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> Cc: Jiri Slaby <jslaby@xxxxxxx> Cc: kernel@xxxxxxxxxxx Cc: linux-serial@xxxxxxxxxxxxxxx --- drivers/tty/serial/Kconfig | 2 +- drivers/tty/serial/st-asc.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-)
You can add my: Acked-by: Maxime Coquelin <maxime.coquelin@xxxxxx> thanks! Maxime -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
