linux-kernel - [PATCH 047/437] tracefs: convert to read/write iterators

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Message-ID: <20240411153126.16201-48-axboe@kernel.dk>
Date: Thu, 11 Apr 2024 09:13:07 -0600
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 047/437] tracefs: convert to read/write iterators

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 fs/tracefs/inode.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index 5545e6bf7d26..b1a9b5f10581 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -46,21 +46,19 @@ static void tracefs_free_inode(struct inode *inode)
 	kmem_cache_free(tracefs_inode_cachep, get_tracefs(inode));
 }
 
-static ssize_t default_read_file(struct file *file, char __user *buf,
-				 size_t count, loff_t *ppos)
+static ssize_t default_read_file_iter(struct kiocb *iocb, struct iov_iter *to)
 {
 	return 0;
 }
 
-static ssize_t default_write_file(struct file *file, const char __user *buf,
-				   size_t count, loff_t *ppos)
+static ssize_t default_write_file_iter(struct kiocb *iocb, struct iov_iter *from)
 {
-	return count;
+	return iov_iter_count(from);
 }
 
 static const struct file_operations tracefs_file_operations = {
-	.read =		default_read_file,
-	.write =	default_write_file,
+	.read_iter =	default_read_file_iter,
+	.write_iter =	default_write_file_iter,
 	.open =		simple_open,
 	.llseek =	noop_llseek,
 };
-- 
2.43.0