sysfs, kernfs: move sysfs_open_file to include/linux/kernfs.h

sysfs_open_file will be used as the primary handle for kernfs methods.
Move its definition from fs/sysfs/file.c to include/linux/kernfs.h and
mark the public and private fields.

This is pure relocation.

Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index e8b73d4a08d2..b923052c29d0 100644
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -9,12 +9,30 @@
 
 #include <linux/kernel.h>
 #include <linux/err.h>
+#include <linux/list.h>
+#include <linux/mutex.h>
 
 struct file;
 struct iattr;
+struct seq_file;
+struct vm_area_struct;
 
 struct sysfs_dirent;
 
+struct sysfs_open_file {
+        /* published fields */
+        struct sysfs_dirent     *sd;
+        struct file             *file;
+
+        /* private fields, do not use outside kernfs proper */
+        struct mutex            mutex;
+        int                     event;
+        struct list_head        list;
+
+        bool                    mmapped;
+        const struct vm_operations_struct *vm_ops;
+};
+
 #ifdef CONFIG_SYSFS
 
 struct sysfs_dirent *kernfs_create_dir_ns(struct sysfs_dirent *parent,