From 7cf34c761db8827818a27e23c50756f8b821a9b0 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 23 Mar 2006 03:00:36 -0800 Subject: [PATCH] [PATCH] sem2mutex: fs/libfs.c 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/libfs.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/fs/libfs.c b/fs/libfs.c index 71fd08fa41..4fdeaceb89 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -7,6 +7,8 @@ #include #include #include +#include + #include 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; } -- 2.39.5