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use mutex instead of semaphore in SPI core/init code

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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>
This commit is contained in:
Matthias Kaehlcke 2007-07-17 04:04:16 -07:00 committed by Linus Torvalds
parent f2cac67dd3
commit 9404082898
1 changed files with 6 additions and 5 deletions
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11
drivers/spi/spi.c
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@ -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);
}
/*-------------------------------------------------------------------------*/