Commit 7a8bf874 authored by David Gibson's avatar David Gibson Committed by Benjamin Herrenschmidt

powerpc: Remove arch specific byteswappers from the MXC MMC driver

When the MXC MMUC driver is used on a Freescale MPC512x machine, it
contains some additional byteswapping code (I'm assuming this is a
workaround for a hardware defect).  This uses the ppc specific st_le32()
function, but there's no reason not to use the generic swab32() function
instead.  gcc is capable of generating the efficient ppc byte-reversing
load/store instructions without the arch-specific helper.

This patch, therefore, switches to the generic byteswap routine.

Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent c2d5a710
......@@ -281,7 +281,7 @@ static inline void buffer_swap32(u32 *buf, int len)
int i;
for (i = 0; i < ((len + 3) / 4); i++) {
st_le32(buf, *buf);
*buf = swab32(*buf);
buf++;
}
}
......
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