git: 7af3fd0993a4 - main - null.c: fix signature mismatch for null_read

The branch main has been updated by aokblast:

URL: https://cgit.FreeBSD.org/src/commit/?id=7af3fd0993a49cce7a749dfb62e9b17ca3a6be1f

commit 7af3fd0993a49cce7a749dfb62e9b17ca3a6be1f
Author:     ShengYi Hung <aokblast@FreeBSD.org>
AuthorDate: 2025-02-28 14:56:45 +0000
Commit:     ShengYi Hung <aokblast@FreeBSD.org>
CommitDate: 2026-10-18 02:29:41 +0000

    null.c: fix signature mismatch for null_read
    
    Reviewed by:    jhb
    Differential Revision: https://reviews.freebsd.org/D49168
---
 sys/dev/null/null.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/sys/dev/null/null.c b/sys/dev/null/null.c
index b5725de30bef..02706dade839 100644
--- a/sys/dev/null/null.c
+++ b/sys/dev/null/null.c
@@ -50,6 +50,7 @@ static struct cdev *full_dev;
 static struct cdev *null_dev;
 static struct cdev *zero_dev;
 
+static d_read_t null_read;
 static d_write_t full_write;
 static d_write_t null_write;
 static d_ioctl_t null_ioctl;
@@ -82,7 +83,7 @@ static struct cdevsw full_cdevsw = {
 
 static struct cdevsw null_cdevsw = {
 	.d_version =	D_VERSION,
-	.d_read =	(d_read_t *)nullop,
+	.d_read =	null_read,
 	.d_write =	null_write,
 	.d_ioctl =	null_ioctl,
 	.d_kqfilter =	kqfilter,
@@ -99,6 +100,13 @@ static struct cdevsw zero_cdevsw = {
 	.d_flags =	D_MMAP_ANON,
 };
 
+static int
+null_read(struct cdev *dev __unused, struct uio *uio __unused,
+    int flags __unused)
+{
+	return (0);
+}
+
 /* ARGSUSED */
 static int
 full_write(struct cdev *dev __unused, struct uio *uio __unused, int flags __unused)