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authorDavid Gibson <david@gibson.dropbear.id.au>2015-02-03 08:36:23 +0300
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2015-03-24 05:33:50 +0300
commit7a8bf874487cc8990857973a789d7161b699389d (patch)
tree4de25247e879b07382252738b0fdec507399c300 /drivers/mmc/host/mxcmmc.c
parentc2d5a71064b5d5d169496907030c887eb6590553 (diff)
downloadlinux-7a8bf874487cc8990857973a789d7161b699389d.tar.xz
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: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'drivers/mmc/host/mxcmmc.c')
-rw-r--r--drivers/mmc/host/mxcmmc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
index 5316d9b9e7b4..317d709f7550 100644
--- a/drivers/mmc/host/mxcmmc.c
+++ b/drivers/mmc/host/mxcmmc.c
@@ -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++;
}
}