kernfs: make kernfs_open_file->mmapped a bitfield

More kernfs_open_file->mutex synchronized flags are planned to be
added.  Convert ->mmapped to a bitfield in preparation.

While at it, make kernfs_fop_mmap() use "true" instead of "1" on
->mmapped.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Acked-by: Zefan Li <lizefan@huawei.com>

diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 78219d5..d0b6fb1 100644 (file)
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -516,7 +516,7 @@ static int kernfs_fop_mmap(struct file *file, struct vm_area_struct *vma)
                goto out_put;
 
        rc = 0;
-       of->mmapped = 1;
+       of->mmapped = true;
        of->vm_ops = vma->vm_ops;
        vma->vm_ops = &kernfs_vm_ops;
 out_put:

diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h
index 7056238..afd4e5a 100644 (file)
--- a/include/linux/kernfs.h
+++ b/include/linux/kernfs.h
@@ -185,7 +185,7 @@ struct kernfs_open_file {
        char                    *prealloc_buf;
 
        size_t                  atomic_write_len;
-       bool                    mmapped;
+       bool                    mmapped:1;
        const struct vm_operations_struct *vm_ops;
 };