From 6be15dce13becd40682f799f7871fa4c2f862178 Mon Sep 17 00:00:00 2001
From: Daan De Meyer <daan.j.demeyer@gmail.com>
Date: Tue, 29 Apr 2025 15:46:48 +0200
Subject: [PATCH] basic: Remove assertions from missing_fs.h

These assertions impose an include order between <linux/fs.h> and
"missing_fs.h", specifically <linux/fs.h> can't be included before
"missing_fs.h". This makes automated include refactoring very painful,
so let's get rid of these assertions and instead assume that linux/fs.h
does the right thing.
---
 src/basic/missing_fs.h        | 42 -----------------------------------
 src/shared/btrfs-util.c       |  2 ++
 src/shared/copy.c             |  1 +
 src/shared/resize-fs.c        |  1 +
 src/udev/udev-builtin-btrfs.c |  1 +
 5 files changed, 5 insertions(+), 42 deletions(-)

diff --git a/src/basic/missing_fs.h b/src/basic/missing_fs.h
index c3b2746b07..1e2f07e55f 100644
--- a/src/basic/missing_fs.h
+++ b/src/basic/missing_fs.h
@@ -1,50 +1,8 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
-/* temporary undef definitions in bits/uio-ext.h, which is included by sys/uio.h */
-#include <sys/uio.h>
-
-#define __RWF_HIPRI_SAVED__     RWF_HIPRI
-#undef RWF_HIPRI
-#define __RWF_DSYNC_SAVED__     RWF_DSYNC
-#undef RWF_DSYNC
-#define __RWF_SYNC_SAVED__      RWF_SYNC
-#undef RWF_SYNC
-#define __RWF_NOWAIT_SAVED__    RWF_NOWAIT
-#undef RWF_NOWAIT
-#define __RWF_APPEND_SAVED__    RWF_APPEND
-#undef RWF_APPEND
-#define __RWF_NOAPPEND_SAVED__  RWF_NOAPPEND
-#undef RWF_NOAPPEND
-#if defined(RWF_ATOMIC)
-#define __RWF_ATOMIC_SAVED__    RWF_ATOMIC
-#undef RWF_ATOMIC
-#else
-#define __RWF_ATOMIC_SAVED__    0x00000040
-#endif
-#if defined(RWF_DONTCACHE)
-#define __RWF_DONTCACHE_SAVED__ RWF_DONTCACHE
-#undef RWF_DONTCACHE
-#else
-#define __RWF_DONTCACHE_SAVED__ 0x00000080
-#endif
-
-#include <linux/btrfs.h>
-#include <linux/btrfs_tree.h>
 #include <linux/fs.h>
 
-#include "macro.h"
-
-/* check RWF_xyz are redefined by linux/fs.h */
-assert_cc(RWF_HIPRI     == __RWF_HIPRI_SAVED__);
-assert_cc(RWF_DSYNC     == __RWF_DSYNC_SAVED__);
-assert_cc(RWF_SYNC      == __RWF_SYNC_SAVED__);
-assert_cc(RWF_NOWAIT    == __RWF_NOWAIT_SAVED__);
-assert_cc(RWF_APPEND    == __RWF_APPEND_SAVED__);
-assert_cc(RWF_NOAPPEND  == __RWF_NOAPPEND_SAVED__);
-assert_cc(RWF_ATOMIC    == __RWF_ATOMIC_SAVED__);
-assert_cc(RWF_DONTCACHE == __RWF_DONTCACHE_SAVED__);
-
 /* Not exposed yet. Defined at fs/ext4/ext4.h */
 #ifndef EXT4_IOC_RESIZE_FS
 #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64)
diff --git a/src/shared/btrfs-util.c b/src/shared/btrfs-util.c
index 713ecb4eb5..d296ac682c 100644
--- a/src/shared/btrfs-util.c
+++ b/src/shared/btrfs-util.c
@@ -3,6 +3,8 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <inttypes.h>
+#include <linux/btrfs.h>
+#include <linux/btrfs_tree.h>
 #include <linux/loop.h>
 #include <linux/magic.h>
 #include <stddef.h>
diff --git a/src/shared/copy.c b/src/shared/copy.c
index c662853ac8..4288bae1ce 100644
--- a/src/shared/copy.c
+++ b/src/shared/copy.c
@@ -2,6 +2,7 @@
 
 #include <errno.h>
 #include <fcntl.h>
+#include <linux/btrfs.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/src/shared/resize-fs.c b/src/shared/resize-fs.c
index b913aedef3..0f28869ea0 100644
--- a/src/shared/resize-fs.c
+++ b/src/shared/resize-fs.c
@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <linux/btrfs.h>
 #include <linux/magic.h>
 #include <sys/ioctl.h>
 #include <sys/vfs.h>
diff --git a/src/udev/udev-builtin-btrfs.c b/src/udev/udev-builtin-btrfs.c
index a1238f1e1b..118b934b76 100644
--- a/src/udev/udev-builtin-btrfs.c
+++ b/src/udev/udev-builtin-btrfs.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <fcntl.h>
+#include <linux/btrfs.h>
 #include <stdlib.h>
 #include <sys/ioctl.h>