From 86690775b0a6615003eebb73961400fa94f72a8b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=BD=D0=B0=D0=B1?= <nabijaczleweli@nabijaczleweli.xyz>
Date: Thu, 24 Mar 2022 16:33:40 +0100
Subject: [PATCH] Linux 5.18 compat: replace genhd.h with blkdev.h includes
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blkdev.h includes genhd.h since dawn of upstream git, so this is
globally safe

Upstream-commit: 322cbb50de711814c42fb088f6d31901502c711a ("block:
 remove genhd.h")

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13251
---
 config/kernel-add-disk.m4             | 5 ++---
 config/kernel-revalidate-disk-size.m4 | 4 ++--
 module/os/linux/zfs/zvol_os.c         | 2 +-
 3 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/config/kernel-add-disk.m4 b/config/kernel-add-disk.m4
index 5d1779eb43..44a8a5fd25 100644
--- a/config/kernel-add-disk.m4
+++ b/config/kernel-add-disk.m4
@@ -3,16 +3,15 @@ dnl # 5.16 API change
 dnl # add_disk grew a must-check return code
 dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_ADD_DISK], [
-
 	ZFS_LINUX_TEST_SRC([add_disk_ret], [
-		#include <linux/genhd.h>
+		#include <linux/blkdev.h>
 	], [
 		struct gendisk *disk = NULL;
 		int err = add_disk(disk);
 		err = err;
 	])
-
 ])
+
 AC_DEFUN([ZFS_AC_KERNEL_ADD_DISK], [
 	AC_MSG_CHECKING([whether add_disk() returns int])
 	ZFS_LINUX_TEST_RESULT([add_disk_ret],
diff --git a/config/kernel-revalidate-disk-size.m4 b/config/kernel-revalidate-disk-size.m4
index a7d0cb3cda..13cb92a174 100644
--- a/config/kernel-revalidate-disk-size.m4
+++ b/config/kernel-revalidate-disk-size.m4
@@ -8,14 +8,14 @@ dnl #
 AC_DEFUN([ZFS_AC_KERNEL_SRC_REVALIDATE_DISK], [
 
 	ZFS_LINUX_TEST_SRC([revalidate_disk_size], [
-		#include <linux/genhd.h>
+		#include <linux/blkdev.h>
 	], [
 		struct gendisk *disk = NULL;
 		(void) revalidate_disk_size(disk, false);
 	])
 
 	ZFS_LINUX_TEST_SRC([revalidate_disk], [
-		#include <linux/genhd.h>
+		#include <linux/blkdev.h>
 	], [
 		struct gendisk *disk = NULL;
 		(void) revalidate_disk(disk);
diff --git a/module/os/linux/zfs/zvol_os.c b/module/os/linux/zfs/zvol_os.c
index f772f41604..c964cce0de 100644
--- a/module/os/linux/zfs/zvol_os.c
+++ b/module/os/linux/zfs/zvol_os.c
@@ -906,7 +906,7 @@ zvol_alloc(dev_t dev, const char *name)
 	if (volmode == ZFS_VOLMODE_DEV) {
 		/*
 		 * ZFS_VOLMODE_DEV disable partitioning on ZVOL devices: set
-		 * gendisk->minors = 1 as noted in include/linux/genhd.h.
+		 * gendisk->minors = 1 as noted in include/linux/blkdev.h.
 		 * Also disable extended partition numbers (GENHD_FL_EXT_DEVT)
 		 * and suppresses partition scanning (GENHD_FL_NO_PART_SCAN)
 		 * setting gendisk->flags accordingly.