adulau/aha
1
0
Fork 0
mirror of https://github.com/adulau/aha.git synced 2024-12-28 03:36:19 +00:00
Code Issues Projects Releases Packages Wiki Activity

[PATCH] sem2mutex: fs/libfs.c

Browse source 
Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ingo Molnar 2006-03-23 03:00:36 -08:00 committed by Linus Torvalds
parent 7a7d1cf954
commit 7cf34c761d
1 changed files with 8 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
fs/libfs.c
View file

@ -7,6 +7,8 @@
#include <linux/pagemap.h>
#include <linux/mount.h>
#include <linux/vfs.h>
#include <linux/mutex.h>
#include <asm/uaccess.h>
int simple_getattr(struct vfsmount *mnt, struct dentry *dentry,
@ -530,7 +532,7 @@ struct simple_attr {
char set_buf[24];
void *data;
const char *fmt; /* format for read operation */
struct semaphore sem; /* protects access to these buffers */
struct mutex mutex; /* protects access to these buffers */
};
/* simple_attr_open is called by an actual attribute open file operation
@ -549,7 +551,7 @@ int simple_attr_open(struct inode *inode, struct file *file,
attr->set = set;
attr->data = inode->u.generic_ip;
attr->fmt = fmt;
init_MUTEX(&attr->sem);
mutex_init(&attr->mutex);
file->private_data = attr;
@ -575,7 +577,7 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
if (!attr->get)
return -EACCES;
down(&attr->sem);
mutex_lock(&attr->mutex);
if (*ppos) /* continued read */
size = strlen(attr->get_buf);
else /* first read */
@ -584,7 +586,7 @@ ssize_t simple_attr_read(struct file *file, char __user *buf,
(unsigned long long)attr->get(attr->data));
ret = simple_read_from_buffer(buf, len, ppos, attr->get_buf, size);
up(&attr->sem);
mutex_unlock(&attr->mutex);
return ret;
}
@ -602,7 +604,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
if (!attr->set)
return -EACCES;
down(&attr->sem);
mutex_lock(&attr->mutex);
ret = -EFAULT;
size = min(sizeof(attr->set_buf) - 1, len);
if (copy_from_user(attr->set_buf, buf, size))
@ -613,7 +615,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf,
val = simple_strtol(attr->set_buf, NULL, 0);
attr->set(attr->data, val);
out:
up(&attr->sem);
mutex_unlock(&attr->mutex);
return ret;
}