From: Nicolas Pitre <nico@cam.org>
Date: Thu, 11 Oct 2007 05:06:03 +0000 (-0400)
Subject: mmc: don't use weight32()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=019a5f56ec195aceadada18aaaad0f67294bdaef;p=linux-beck.git

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 4a72772f4fe4..d0eb0a2abf4d 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 @@ static void mmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 
 	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;
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;