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authorNicolas Pitre <nico@cam.org>2007-10-11 01:06:03 -0400
committerPierre Ossman <drzeus@drzeus.cx>2007-10-11 19:09:08 +0200
commit019a5f56ec195aceadada18aaaad0f67294bdaef (patch)
treed31830cf7ec683ef6fd6719236011c9ded649847 /drivers/mmc/host/tifm_sd.c
parentc783837bc69dd0f329a441c1704f5a02d01d1bd5 (diff)
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>
Diffstat (limited to 'drivers/mmc/host/tifm_sd.c')
-rw-r--r--drivers/mmc/host/tifm_sd.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index 951392d2ce37..9b904795eb77 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -16,6 +16,7 @@
#include <linux/mmc/host.h>
#include <linux/highmem.h>
#include <linux/scatterlist.h>
+#include <linux/log2.h>
#include <asm/io.h>
#define DRIVER_NAME "tifm_sd"
@@ -637,7 +638,7 @@ static void tifm_sd_request(struct mmc_host *mmc, struct mmc_request *mrq)
goto err_out;
}
- 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",
sock->dev.bus_id, mrq->data->blksz);
mrq->cmd->error = -EINVAL;