mmc: don't use weight32()
Using weight32() to determine if a value is a power of 2 is a rather
heavi weight solution. The classic idiom is (x & (x - 1)) == 0, but
the kernel already provide a is_power_of_2 function for it.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 4a72772..d0eb0a2 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -16,6 +16,7 @@
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/highmem.h>
+#include <linux/log2.h>
#include <linux/mmc/host.h>
#include <linux/amba/bus.h>
#include <linux/clk.h>
@@ -391,7 +392,7 @@
WARN_ON(host->mrq != NULL);
- if (mrq->data && (hweight32(mrq->data->blksz) > 1)) {
+ if (mrq->data && !is_power_of_2(mrq->data->blksz)) {
printk(KERN_ERR "%s: Unsupported block size (%d bytes)\n",
mmc_hostname(mmc), mrq->data->blksz);
mrq->cmd->error = -EINVAL;