linux-kernel - [PATCH v7 01/30] ntsync: Return the fd from NTSYNC_IOC_CREATE

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Message-ID: <20241213193511.457338-2-zfigura@codeweavers.com>
Date: Fri, 13 Dec 2024 13:34:42 -0600
From: Elizabeth Figura <zfigura@...eweavers.com>
To: Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jonathan Corbet <corbet@....net>,
	Shuah Khan <shuah@...nel.org>
Cc: linux-kernel@...r.kernel.org,
	linux-api@...r.kernel.org,
	wine-devel@...ehq.org,
	André Almeida <andrealmeid@...lia.com>,
	Wolfram Sang <wsa@...nel.org>,
	Arkadiusz Hiler <ahiler@...eweavers.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Andy Lutomirski <luto@...nel.org>,
	linux-doc@...r.kernel.org,
	linux-kselftest@...r.kernel.org,
	Randy Dunlap <rdunlap@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Will Deacon <will@...nel.org>,
	Waiman Long <longman@...hat.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Elizabeth Figura <zfigura@...eweavers.com>
Subject: [PATCH v7 01/30] ntsync: Return the fd from NTSYNC_IOC_CREATE_SEM.

Simplify the user API a bit by returning the fd as return value from the ioctl
instead of through the argument pointer.

Signed-off-by: Elizabeth Figura <zfigura@...eweavers.com>
---
 drivers/misc/ntsync.c       | 7 ++-----
 include/uapi/linux/ntsync.h | 3 +--
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/ntsync.c b/drivers/misc/ntsync.c
index 4954553b7baa..2e7f698268c1 100644
--- a/drivers/misc/ntsync.c
+++ b/drivers/misc/ntsync.c
@@ -165,7 +165,6 @@ static int ntsync_obj_get_fd(struct ntsync_obj *obj)
 
 static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp)
 {
-	struct ntsync_sem_args __user *user_args = argp;
 	struct ntsync_sem_args args;
 	struct ntsync_obj *sem;
 	int fd;
@@ -182,12 +181,10 @@ static int ntsync_create_sem(struct ntsync_device *dev, void __user *argp)
 	sem->u.sem.count = args.count;
 	sem->u.sem.max = args.max;
 	fd = ntsync_obj_get_fd(sem);
-	if (fd < 0) {
+	if (fd < 0)
 		kfree(sem);
-		return fd;
-	}
 
-	return put_user(fd, &user_args->sem);
+	return fd;
 }
 
 static int ntsync_char_open(struct inode *inode, struct file *file)
diff --git a/include/uapi/linux/ntsync.h b/include/uapi/linux/ntsync.h
index dcfa38fdc93c..27d8cb3dd5b7 100644
--- a/include/uapi/linux/ntsync.h
+++ b/include/uapi/linux/ntsync.h
@@ -11,12 +11,11 @@
 #include <linux/types.h>
 
 struct ntsync_sem_args {
-	__u32 sem;
 	__u32 count;
 	__u32 max;
 };
 
-#define NTSYNC_IOC_CREATE_SEM		_IOWR('N', 0x80, struct ntsync_sem_args)
+#define NTSYNC_IOC_CREATE_SEM		_IOW ('N', 0x80, struct ntsync_sem_args)
 
 #define NTSYNC_IOC_SEM_POST		_IOWR('N', 0x81, __u32)
 
-- 
2.45.2