tty: amba-pl011: switch to using relaxed IO accessors

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Using relaxed IO accessors allows GCC to better optimise this code
as we eliminate the heavy memory barriers - for example, GCC can now
cache the address of a register across a read-modify-write sequence,
rather than reloading the base address, offset and access size flag.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Russell King 2015-11-16 17:41:02 +00:00 • committed by Greg Kroah-Hartman

parent 7ec7587189

commit f5ce6edd22

1 changed files with 3 additions and 3 deletions

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drivers/tty/serial/amba-pl011.c

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