[PATCH v3 1/7] fs: add icount_read_once()

[Mateusz Guzik <mjguzik@gmail.com>]

It will be used to denote the caller acknowledges how the count can
change from under them.

Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
---
 include/linux/fs.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 8afbe2ef2686..0cf27085a579 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2225,6 +2225,11 @@ static inline void mark_inode_dirty_sync(struct inode *inode)
 	__mark_inode_dirty(inode, I_DIRTY_SYNC);
 }
 
+static inline int icount_read_once(const struct inode *inode)
+{
+	return atomic_read(&inode->i_count);
+}
+
 static inline int icount_read(const struct inode *inode)
 {
 	return atomic_read(&inode->i_count);
-- 
2.48.1