1 files changed, 21 insertions, 24 deletions

diff --git a/fs/timerfd.c b/fs/timerfd.c
index dffeb37..d03822b 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -234,19 +234,17 @@ static const struct file_operations timerfd_fops = {
 	.llseek		= noop_llseek,
 };
 
-static struct file *timerfd_fget(int fd)
+static int timerfd_fget(int fd, struct fd *p)
 {
-	struct file *file;
-
-	file = fget(fd);
-	if (!file)
-		return ERR_PTR(-EBADF);
-	if (file->f_op != &timerfd_fops) {
-		fput(file);
-		return ERR_PTR(-EINVAL);
+	struct fd f = fdget(fd);
+	if (!f.file)
+		return -EBADF;
+	if (f.file->f_op != &timerfd_fops) {
+		fdput(f);
+		return -EINVAL;
 	}
-
-	return file;
+	*p = f;
+	return 0;
 }
 
 SYSCALL_DEFINE2(timerfd_create, int, clockid, int, flags)
@@ -284,7 +282,7 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
 		const struct itimerspec __user *, utmr,
 		struct itimerspec __user *, otmr)
 {
-	struct file *file;
+	struct fd f;
 	struct timerfd_ctx *ctx;
 	struct itimerspec ktmr, kotmr;
 	int ret;
@@ -297,10 +295,10 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
 	    !timespec_valid(&ktmr.it_interval))
 		return -EINVAL;
 
-	file = timerfd_fget(ufd);
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-	ctx = file->private_data;
+	ret = timerfd_fget(ufd, &f);
+	if (ret)
+		return ret;
+	ctx = f.file->private_data;
 
 	timerfd_setup_cancel(ctx, flags);
 
@@ -334,7 +332,7 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
 	ret = timerfd_setup(ctx, flags, &ktmr);
 
 	spin_unlock_irq(&ctx->wqh.lock);
-	fput(file);
+	fdput(f);
 	if (otmr && copy_to_user(otmr, &kotmr, sizeof(kotmr)))
 		return -EFAULT;
 
@@ -343,14 +341,13 @@ SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
 
 SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
 {
-	struct file *file;
+	struct fd f;
 	struct timerfd_ctx *ctx;
 	struct itimerspec kotmr;
-
-	file = timerfd_fget(ufd);
-	if (IS_ERR(file))
-		return PTR_ERR(file);
-	ctx = file->private_data;
+	int ret = timerfd_fget(ufd, &f);
+	if (ret)
+		return ret;
+	ctx = f.file->private_data;
 
 	spin_lock_irq(&ctx->wqh.lock);
 	if (ctx->expired && ctx->tintv.tv64) {
@@ -362,7 +359,7 @@ SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct itimerspec __user *, otmr)
 	kotmr.it_value = ktime_to_timespec(timerfd_get_remaining(ctx));
 	kotmr.it_interval = ktime_to_timespec(ctx->tintv);
 	spin_unlock_irq(&ctx->wqh.lock);
-	fput(file);
+	fdput(f);
 
 	return copy_to_user(otmr, &kotmr, sizeof(kotmr)) ? -EFAULT: 0;
 }