[PATCH v3 3/8] debugfs: debugfs_real_fops(): drop __must_hold sparse annotation

Nicolai Stange
2017-10-30T23:15:49Z

Currently, debugfs_real_fops() is annotated with a
__must_hold(&debugfs_srcu) sparse annotation.

With the conversion of the SRCU based protection of users against
concurrent file removals to a per-file refcount based scheme, this becomes
wrong.

Drop this annotation.

Signed-off-by: Nicolai Stange <nicstange@gmail.com>
---
fs/debugfs/file.c | 6 +-----
include/linux/debugfs.h | 3 +--
2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 6644bfdea2f8..08511678b782 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -98,13 +98,9 @@ EXPORT_SYMBOL_GPL(debugfs_use_file_finish);
#define F_DENTRY(filp) ((filp)->f_path.dentry)

const struct file_operations *debugfs_real_fops(const struct file *filp)
- __must_hold(&debugfs_srcu)
{
struct debugfs_fsdata *fsd = F_DENTRY(filp)->d_fsdata;
- /*
- * Neither the pointer to the struct file_operations, nor its
- * contents ever change -- srcu_dereference() is not needed here.
- */
+
return fsd->real_fops;
}
EXPORT_SYMBOL_GPL(debugfs_real_fops);
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index 3b914d588148..c5eda259b9d6 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -95,8 +95,7 @@ int debugfs_use_file_start(const struct dentry *dentry, int *srcu_idx)

void debugfs_use_file_finish(int srcu_idx) __releases(&debugfs_srcu);

-const struct file_operations *debugfs_real_fops(const struct file *filp)
- __must_hold(&debugfs_srcu);
+const struct file_operations *debugfs_real_fops(const struct file *filp);

int debugfs_file_get(struct dentry *dentry);
void debugfs_file_put(struct dentry *dentry);
--
2.13.6