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authorJohannes Berg <johannes@sipsolutions.net>2007-06-22 11:20:00 +0200
committerMark Fasheh <mark.fasheh@oracle.com>2007-07-10 17:10:58 -0700
commit6d748924b753d63a57dad130fdf11f64c27ff54b (patch)
tree93af23c4329ffb16de923ab84f63669b2423ea29
parente6bd07aee739566803425acdbf5cdb29919164e1 (diff)
[PATCH] configsfs buffer: use mutex
Seems copied from sysfs, but I don't see a reason here nor there to use a semaphore instead of a mutex. Convert. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
-rw-r--r--fs/configfs/file.c15
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 0f4b65e8524..a3658f9a082 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -27,8 +27,8 @@
#include <linux/fs.h>
#include <linux/module.h>
#include <linux/slab.h>
+#include <linux/mutex.h>
#include <asm/uaccess.h>
-#include <asm/semaphore.h>
#include <linux/configfs.h>
#include "configfs_internal.h"
@@ -46,7 +46,7 @@ struct configfs_buffer {
loff_t pos;
char * page;
struct configfs_item_operations * ops;
- struct semaphore sem;
+ struct mutex mutex;
int needs_read_fill;
};
@@ -109,7 +109,7 @@ configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *pp
struct configfs_buffer * buffer = file->private_data;
ssize_t retval = 0;
- down(&buffer->sem);
+ mutex_lock(&buffer->mutex);
if (buffer->needs_read_fill) {
if ((retval = fill_read_buffer(file->f_path.dentry,buffer)))
goto out;
@@ -119,7 +119,7 @@ configfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *pp
retval = simple_read_from_buffer(buf, count, ppos, buffer->page,
buffer->count);
out:
- up(&buffer->sem);
+ mutex_unlock(&buffer->mutex);
return retval;
}
@@ -200,13 +200,13 @@ configfs_write_file(struct file *file, const char __user *buf, size_t count, lof
struct configfs_buffer * buffer = file->private_data;
ssize_t len;
- down(&buffer->sem);
+ mutex_lock(&buffer->mutex);
len = fill_write_buffer(buffer, buf, count);
if (len > 0)
len = flush_write_buffer(file->f_path.dentry, buffer, count);
if (len > 0)
*ppos += len;
- up(&buffer->sem);
+ mutex_unlock(&buffer->mutex);
return len;
}
@@ -260,7 +260,7 @@ static int check_perm(struct inode * inode, struct file * file)
error = -ENOMEM;
goto Enomem;
}
- init_MUTEX(&buffer->sem);
+ mutex_init(&buffer->mutex);
buffer->needs_read_fill = 1;
buffer->ops = ops;
file->private_data = buffer;
@@ -299,6 +299,7 @@ static int configfs_release(struct inode * inode, struct file * filp)
if (buffer) {
if (buffer->page)
free_page((unsigned long)buffer->page);
+ mutex_destroy(&buffer->mutex);
kfree(buffer);
}
return 0;