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| author | Matthias Kaehlcke <matthias.kaehlcke@gmail.com> | 2007-07-17 04:04:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:05 -0700 |
| commit | 940408289842677cfe9e053a6c423bf3fb922560 (patch) | |
| tree | 5648e2dc2ae121395e33e596fbf6d252f7c51cbd /drivers/spi/spi.c | |
| parent | f2cac67dd36626128e06e79fc7ca95d544dcdc67 (diff) | |
| download | linux-3.10-940408289842677cfe9e053a6c423bf3fb922560.tar.gz linux-3.10-940408289842677cfe9e053a6c423bf3fb922560.tar.bz2 linux-3.10-940408289842677cfe9e053a6c423bf3fb922560.zip | |
use mutex instead of semaphore in SPI core/init code
The SPI core/init code uses a semaphore as mutex. Use the mutex API instead
of the (binary) semaphore.
Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi/spi.c')
| -rw-r--r-- | drivers/spi/spi.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 4831edbae2d..018884d7a5f 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -23,6 +23,7 @@ #include <linux/device.h> #include <linux/init.h> #include <linux/cache.h> +#include <linux/mutex.h> #include <linux/spi/spi.h> @@ -185,7 +186,7 @@ struct boardinfo { }; static LIST_HEAD(board_list); -static DECLARE_MUTEX(board_lock); +static DEFINE_MUTEX(board_lock); /** @@ -292,9 +293,9 @@ spi_register_board_info(struct spi_board_info const *info, unsigned n) bi->n_board_info = n; memcpy(bi->board_info, info, n * sizeof *info); - down(&board_lock); + mutex_lock(&board_lock); list_add_tail(&bi->list, &board_list); - up(&board_lock); + mutex_unlock(&board_lock); return 0; } @@ -308,7 +309,7 @@ scan_boardinfo(struct spi_master *master) struct boardinfo *bi; struct device *dev = master->cdev.dev; - down(&board_lock); + mutex_lock(&board_lock); list_for_each_entry(bi, &board_list, list) { struct spi_board_info *chip = bi->board_info; unsigned n; @@ -330,7 +331,7 @@ scan_boardinfo(struct spi_master *master) (void) spi_new_device(master, chip); } } - up(&board_lock); + mutex_unlock(&board_lock); } /*-------------------------------------------------------------------------*/ |