diff options
| author | Nicolas Pitre <nico@cam.org> | 2007-10-11 07:06:03 +0200 |
|---|---|---|
| committer | Pierre Ossman <drzeus@drzeus.cx> | 2007-10-11 19:09:08 +0200 |
| commit | 019a5f56ec195aceadada18aaaad0f67294bdaef (patch) | |
| tree | d31830cf7ec683ef6fd6719236011c9ded649847 /drivers/mmc/host | |
| parent | pxamci: support arbitrary block size (diff) | |
| download | linux-019a5f56ec195aceadada18aaaad0f67294bdaef.tar.xz linux-019a5f56ec195aceadada18aaaad0f67294bdaef.zip | |
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')
| -rw-r--r-- | drivers/mmc/host/mmci.c | 3 | ||||
| -rw-r--r-- | drivers/mmc/host/tifm_sd.c | 3 |
2 files changed, 4 insertions, 2 deletions
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; |