home: drop conflicted headers

Fixes #24117.

src/basic/missing_fs.h

@@ -64,3 +64,8 @@
 #ifndef FS_PROJINHERIT_FL
 #define FS_PROJINHERIT_FL 0x20000000
 #endif
+
+/* linux/fscrypt.h */
+#ifndef FS_KEY_DESCRIPTOR_SIZE
+#define FS_KEY_DESCRIPTOR_SIZE 8
+#endif

src/home/homework-cifs.c

@@ -1,5 +1,10 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <sys/mount.h>
+#if WANT_LINUX_FS_H
+#include <linux/fs.h>
+#endif
+
 #include "dirent-util.h"
 #include "fd-util.h"
 #include "fileio.h"

src/home/homework-luks.c

@@ -4,7 +4,6 @@
 #include <poll.h>
 #include <sys/file.h>
 #include <sys/ioctl.h>
-#include <sys/mount.h>
 #include <sys/xattr.h>
 
 #if HAVE_VALGRIND_MEMCHECK_H

src/home/homework-mount.c

@@ -2,7 +2,9 @@
 
 #include <sched.h>
 #include <sys/mount.h>
+#if WANT_LINUX_FS_H
 #include <linux/fs.h>
+#endif
 
 #include "alloc-util.h"
 #include "fd-util.h"

src/home/homework.h

@@ -1,13 +1,14 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
-#include <linux/fs.h>
 #include <sys/vfs.h>
 
 #include "sd-id128.h"
 
+#include "cryptsetup-util.h"
 #include "homework-password-cache.h"
 #include "loop-util.h"
+#include "missing_fs.h" /* for FS_KEY_DESCRIPTOR_SIZE, do not include linux/fs.h */
 #include "missing_keyctl.h"
 #include "missing_syscall.h"
 #include "user-record.h"