linux-kernel - [PATCH 265/437] watchdog: cpwd: convert to read/write iterators

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Message-ID: <20240411153126.16201-266-axboe@kernel.dk>
Date: Thu, 11 Apr 2024 09:16:45 -0600
From: Jens Axboe <axboe@...nel.dk>
To: linux-kernel@...r.kernel.org
Cc: Jens Axboe <axboe@...nel.dk>
Subject: [PATCH 265/437] watchdog: cpwd: convert to read/write iterators

Signed-off-by: Jens Axboe <axboe@...nel.dk>
---
 drivers/watchdog/cpwd.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/watchdog/cpwd.c b/drivers/watchdog/cpwd.c
index 901b94d456db..ca6d08107043 100644
--- a/drivers/watchdog/cpwd.c
+++ b/drivers/watchdog/cpwd.c
@@ -478,10 +478,10 @@ static long cpwd_compat_ioctl(struct file *file, unsigned int cmd, unsigned long
 	return cpwd_ioctl(file, cmd, (unsigned long)compat_ptr(arg));
 }
 
-static ssize_t cpwd_write(struct file *file, const char __user *buf,
-			  size_t count, loff_t *ppos)
+static ssize_t cpwd_write(struct kiocb *iocb, struct iov_iter *from)
 {
-	struct inode *inode = file_inode(file);
+	struct inode *inode = file_inode(iocb->ki_filp);
+	size_t count = iov_iter_count(from);
 	struct cpwd *p = cpwd_device;
 	int index = iminor(inode);
 
@@ -493,8 +493,7 @@ static ssize_t cpwd_write(struct file *file, const char __user *buf,
 	return 0;
 }
 
-static ssize_t cpwd_read(struct file *file, char __user *buffer,
-			 size_t count, loff_t *ppos)
+static ssize_t cpwd_read(struct kiocb *iocb, struct iov_iter *to)
 {
 	return -EINVAL;
 }
@@ -504,8 +503,8 @@ static const struct file_operations cpwd_fops = {
 	.unlocked_ioctl =	cpwd_ioctl,
 	.compat_ioctl =		cpwd_compat_ioctl,
 	.open =			cpwd_open,
-	.write =		cpwd_write,
-	.read =			cpwd_read,
+	.write_iter =		cpwd_write,
+	.read_iter =		cpwd_read,
 	.release =		cpwd_release,
 	.llseek =		no_llseek,
 };
-- 
2.43.0