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-rw-r--r--fs/sysfs/bin.c50
-rw-r--r--fs/sysfs/dir.c43
-rw-r--r--fs/sysfs/file.c18
-rw-r--r--fs/sysfs/sysfs.h4
4 files changed, 38 insertions, 77 deletions
diff --git a/fs/sysfs/bin.c b/fs/sysfs/bin.c
index a0a500af24a1..e9d293593e52 100644
--- a/fs/sysfs/bin.c
+++ b/fs/sysfs/bin.c
@@ -54,14 +54,14 @@ fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
int rc;
/* need attr_sd for attr, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
rc = -EIO;
if (attr->read)
rc = attr->read(kobj, attr, buffer, off, count);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return rc;
}
@@ -125,14 +125,14 @@ flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
int rc;
/* need attr_sd for attr, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
rc = -EIO;
if (attr->write)
rc = attr->write(kobj, attr, buffer, offset, count);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return rc;
}
@@ -184,12 +184,12 @@ static void bin_vma_open(struct vm_area_struct *vma)
if (!bb->vm_ops || !bb->vm_ops->open)
return;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return;
bb->vm_ops->open(vma);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
}
static void bin_vma_close(struct vm_area_struct *vma)
@@ -201,12 +201,12 @@ static void bin_vma_close(struct vm_area_struct *vma)
if (!bb->vm_ops || !bb->vm_ops->close)
return;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return;
bb->vm_ops->close(vma);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
}
static int bin_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
@@ -219,12 +219,12 @@ static int bin_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (!bb->vm_ops || !bb->vm_ops->fault)
return VM_FAULT_SIGBUS;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return VM_FAULT_SIGBUS;
ret = bb->vm_ops->fault(vma, vmf);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return ret;
}
@@ -241,12 +241,12 @@ static int bin_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
if (!bb->vm_ops->page_mkwrite)
return 0;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return VM_FAULT_SIGBUS;
ret = bb->vm_ops->page_mkwrite(vma, vmf);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return ret;
}
@@ -261,12 +261,12 @@ static int bin_access(struct vm_area_struct *vma, unsigned long addr,
if (!bb->vm_ops || !bb->vm_ops->access)
return -EINVAL;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -EINVAL;
ret = bb->vm_ops->access(vma, addr, buf, len, write);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return ret;
}
@@ -281,12 +281,12 @@ static int bin_set_policy(struct vm_area_struct *vma, struct mempolicy *new)
if (!bb->vm_ops || !bb->vm_ops->set_policy)
return 0;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -EINVAL;
ret = bb->vm_ops->set_policy(vma, new);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return ret;
}
@@ -301,12 +301,12 @@ static struct mempolicy *bin_get_policy(struct vm_area_struct *vma,
if (!bb->vm_ops || !bb->vm_ops->get_policy)
return vma->vm_policy;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return vma->vm_policy;
pol = bb->vm_ops->get_policy(vma, addr);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return pol;
}
@@ -321,12 +321,12 @@ static int bin_migrate(struct vm_area_struct *vma, const nodemask_t *from,
if (!bb->vm_ops || !bb->vm_ops->migrate)
return 0;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return 0;
ret = bb->vm_ops->migrate(vma, from, to, flags);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return ret;
}
#endif
@@ -356,7 +356,7 @@ static int mmap(struct file *file, struct vm_area_struct *vma)
/* need attr_sd for attr, its parent for kobj */
rc = -ENODEV;
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
goto out_unlock;
rc = -EINVAL;
@@ -384,7 +384,7 @@ static int mmap(struct file *file, struct vm_area_struct *vma)
bb->vm_ops = vma->vm_ops;
vma->vm_ops = &bin_vm_ops;
out_put:
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
out_unlock:
mutex_unlock(&bb->mutex);
@@ -399,7 +399,7 @@ static int open(struct inode * inode, struct file * file)
int error;
/* binary file operations requires both @sd and its parent */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
error = -EACCES;
@@ -426,11 +426,11 @@ static int open(struct inode * inode, struct file * file)
mutex_unlock(&sysfs_bin_lock);
/* open succeeded, put active references */
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return 0;
err_out:
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
kfree(bb);
return error;
}
diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
index 5c4703d751b5..1bdc42f4fd93 100644
--- a/fs/sysfs/dir.c
+++ b/fs/sysfs/dir.c
@@ -93,7 +93,7 @@ static void sysfs_unlink_sibling(struct sysfs_dirent *sd)
* RETURNS:
* Pointer to @sd on success, NULL on failure.
*/
-static struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
+struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
{
if (unlikely(!sd))
return NULL;
@@ -124,7 +124,7 @@ static struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd)
* Put an active reference to @sd. This function is noop if @sd
* is NULL.
*/
-static void sysfs_put_active(struct sysfs_dirent *sd)
+void sysfs_put_active(struct sysfs_dirent *sd)
{
struct completion *cmpl;
int v;
@@ -145,45 +145,6 @@ static void sysfs_put_active(struct sysfs_dirent *sd)
}
/**
- * sysfs_get_active_two - get active references to sysfs_dirent and parent
- * @sd: sysfs_dirent of interest
- *
- * Get active reference to @sd and its parent. Parent's active
- * reference is grabbed first. This function is noop if @sd is
- * NULL.
- *
- * RETURNS:
- * Pointer to @sd on success, NULL on failure.
- */
-struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd)
-{
- if (sd) {
- if (sd->s_parent && unlikely(!sysfs_get_active(sd->s_parent)))
- return NULL;
- if (unlikely(!sysfs_get_active(sd))) {
- sysfs_put_active(sd->s_parent);
- return NULL;
- }
- }
- return sd;
-}
-
-/**
- * sysfs_put_active_two - put active references to sysfs_dirent and parent
- * @sd: sysfs_dirent of interest
- *
- * Put active references to @sd and its parent. This function is
- * noop if @sd is NULL.
- */
-void sysfs_put_active_two(struct sysfs_dirent *sd)
-{
- if (sd) {
- sysfs_put_active(sd);
- sysfs_put_active(sd->s_parent);
- }
-}
-
-/**
* sysfs_deactivate - deactivate sysfs_dirent
* @sd: sysfs_dirent to deactivate
*
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index ced2299f1c9a..40961366e929 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -85,13 +85,13 @@ static int fill_read_buffer(struct dentry * dentry, struct sysfs_buffer * buffer
return -ENOMEM;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
buffer->event = atomic_read(&attr_sd->s_attr.open->event);
count = ops->show(kobj, attr_sd->s_attr.attr, buffer->page);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
/*
* The code works fine with PAGE_SIZE return but it's likely to
@@ -203,12 +203,12 @@ flush_write_buffer(struct dentry * dentry, struct sysfs_buffer * buffer, size_t
int rc;
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
rc = ops->store(kobj, attr_sd->s_attr.attr, buffer->page, count);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return rc;
}
@@ -344,7 +344,7 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
memmove(last_sysfs_file, p, strlen(p) + 1);
/* need attr_sd for attr and ops, its parent for kobj */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
return -ENODEV;
/* every kobject with an attribute needs a ktype assigned */
@@ -393,13 +393,13 @@ static int sysfs_open_file(struct inode *inode, struct file *file)
goto err_free;
/* open succeeded, put active references */
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return 0;
err_free:
kfree(buffer);
err_out:
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
return error;
}
@@ -437,12 +437,12 @@ static unsigned int sysfs_poll(struct file *filp, poll_table *wait)
struct sysfs_open_dirent *od = attr_sd->s_attr.open;
/* need parent for the kobj, grab both */
- if (!sysfs_get_active_two(attr_sd))
+ if (!sysfs_get_active(attr_sd))
goto trigger;
poll_wait(filp, &od->poll, wait);
- sysfs_put_active_two(attr_sd);
+ sysfs_put_active(attr_sd);
if (buffer->event != atomic_read(&od->event))
goto trigger;
diff --git a/fs/sysfs/sysfs.h b/fs/sysfs/sysfs.h
index cdd9377a6e06..bb7723c4f5a5 100644
--- a/fs/sysfs/sysfs.h
+++ b/fs/sysfs/sysfs.h
@@ -124,8 +124,8 @@ extern const struct file_operations sysfs_dir_operations;
extern const struct inode_operations sysfs_dir_inode_operations;
struct dentry *sysfs_get_dentry(struct sysfs_dirent *sd);
-struct sysfs_dirent *sysfs_get_active_two(struct sysfs_dirent *sd);
-void sysfs_put_active_two(struct sysfs_dirent *sd);
+struct sysfs_dirent *sysfs_get_active(struct sysfs_dirent *sd);
+void sysfs_put_active(struct sysfs_dirent *sd);
void sysfs_addrm_start(struct sysfs_addrm_cxt *acxt,
struct sysfs_dirent *parent_sd);
int __sysfs_add_one(struct sysfs_addrm_cxt *acxt, struct sysfs_dirent *sd);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 09:35:13 +0100