linux-kernel - [PATCH 103/437] ipc: convert to read/write iterators

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Message-ID: <20240411153126.16201-104-axboe@kernel.dk>
Date: Thu, 11 Apr 2024 09:14:03 -0600
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 103/437] ipc: convert to read/write iterators

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 ipc/mqueue.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 5eea4dc0509e..812b03cf4273 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -632,10 +632,9 @@ static int mqueue_unlink(struct inode *dir, struct dentry *dentry)
 *	that are interesting from user point of view and aren't accessible
 *	through std routines)
 */
-static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
-				size_t count, loff_t *off)
+static ssize_t mqueue_read_file(struct kiocb *iocb, struct iov_iter *to)
 {
-	struct inode *inode = file_inode(filp);
+	struct inode *inode = file_inode(iocb->ki_filp);
 	struct mqueue_inode_info *info = MQUEUE_I(inode);
 	char buffer[FILENT_SIZE];
 	ssize_t ret;
@@ -652,8 +651,7 @@ static ssize_t mqueue_read_file(struct file *filp, char __user *u_data,
 	spin_unlock(&info->lock);
 	buffer[sizeof(buffer)-1] = '\0';
 
-	ret = simple_read_from_buffer(u_data, count, off, buffer,
-				strlen(buffer));
+	ret = simple_copy_to_iter(buffer, &iocb->ki_pos, strlen(buffer), to);
 	if (ret <= 0)
 		return ret;
 
@@ -1663,7 +1661,7 @@ static const struct inode_operations mqueue_dir_inode_operations = {
 static const struct file_operations mqueue_file_operations = {
 	.flush = mqueue_flush_file,
 	.poll = mqueue_poll_file,
-	.read = mqueue_read_file,
+	.read_iter = mqueue_read_file,
 	.llseek = default_llseek,
 };
 
-- 
2.43.0