[PATCH 2/5] mm: make generic_perform_write() take a struct kiocb

[Jens Axboe <axboe@kernel.dk>]

Right now all callers pass in iocb->ki_pos, just pass in the iocb. This
is in preparation for using the iocb flags in generic_perform_write().

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/ceph/file.c     | 2 +-
 fs/ext4/file.c     | 2 +-
 fs/nfs/file.c      | 2 +-
 include/linux/fs.h | 3 ++-
 mm/filemap.c       | 8 +++++---
 5 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 11929d2bb594..096c009f188f 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -1538,7 +1538,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		 * are pending vmtruncate. So write and vmtruncate
 		 * can not run at the same time
 		 */
-		written = generic_perform_write(file, from, pos);
+		written = generic_perform_write(file, from, iocb);
 		if (likely(written >= 0))
 			iocb->ki_pos = pos + written;
 		ceph_end_io_write(inode);
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 6a7293a5cda2..9ffb857765d5 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -249,7 +249,7 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
 		goto out;
 
 	current->backing_dev_info = inode_to_bdi(inode);
-	ret = generic_perform_write(iocb->ki_filp, from, iocb->ki_pos);
+	ret = generic_perform_write(iocb->ki_filp, from, iocb);
 	current->backing_dev_info = NULL;
 
 out:
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 8eb731d9be3e..d8f51a702a4e 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -624,7 +624,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 	result = generic_write_checks(iocb, from);
 	if (result > 0) {
 		current->backing_dev_info = inode_to_bdi(inode);
-		result = generic_perform_write(file, from, iocb->ki_pos);
+		result = generic_perform_write(file, from, iocb);
 		current->backing_dev_info = NULL;
 	}
 	nfs_end_io_write(inode);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 092ea2a4319b..bf58db1bc032 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -3103,7 +3103,8 @@ extern ssize_t generic_file_read_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t __generic_file_write_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t generic_file_write_iter(struct kiocb *, struct iov_iter *);
 extern ssize_t generic_file_direct_write(struct kiocb *, struct iov_iter *);
-extern ssize_t generic_perform_write(struct file *, struct iov_iter *, loff_t);
+extern ssize_t generic_perform_write(struct file *, struct iov_iter *,
+				     struct kiocb *);
 
 ssize_t vfs_iter_read(struct file *file, struct iov_iter *iter, loff_t *ppos,
 		rwf_t flags);
diff --git a/mm/filemap.c b/mm/filemap.c
index ed23a11b3e34..fe37bd2b2630 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -3302,10 +3302,11 @@ struct page *grab_cache_page_write_begin(struct address_space *mapping,
 EXPORT_SYMBOL(grab_cache_page_write_begin);
 
 ssize_t generic_perform_write(struct file *file,
-				struct iov_iter *i, loff_t pos)
+				struct iov_iter *i, struct kiocb *iocb)
 {
 	struct address_space *mapping = file->f_mapping;
 	const struct address_space_operations *a_ops = mapping->a_ops;
+	loff_t pos = iocb->ki_pos;
 	long status = 0;
 	ssize_t written = 0;
 	unsigned int flags = 0;
@@ -3439,7 +3440,8 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		if (written < 0 || !iov_iter_count(from) || IS_DAX(inode))
 			goto out;
 
-		status = generic_perform_write(file, from, pos = iocb->ki_pos);
+		pos = iocb->ki_pos;
+		status = generic_perform_write(file, from, iocb);
 		/*
 		 * If generic_perform_write() returned a synchronous error
 		 * then we want to return the number of bytes which were
@@ -3471,7 +3473,7 @@ ssize_t __generic_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 			 */
 		}
 	} else {
-		written = generic_perform_write(file, from, iocb->ki_pos);
+		written = generic_perform_write(file, from, iocb);
 		if (likely(written > 0))
 			iocb->ki_pos += written;
 	}
-- 
2.24.0