Initialize bpffs as a pseudo filesystem instead of raising
SB_I_NOEXEC and SB_I_NODEV by hand. This adds SB_I_PSEUDO.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alexander Mikhalitsyn <alex@amutable.com>
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
---
 kernel/bpf/inode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/bpf/inode.c b/kernel/bpf/inode.c
index c6f328e4752e1..57cf3775c0766 100644
--- a/kernel/bpf/inode.c
+++ b/kernel/bpf/inode.c
@@ -15,6 +15,7 @@
 #include <linux/namei.h>
 #include <linux/fs.h>
 #include <linux/fs_context.h>
+#include <linux/pseudo_fs.h>
 #include <linux/fs_parser.h>
 #include <linux/kdev_t.h>
 #include <linux/filter.h>
@@ -1197,8 +1198,6 @@ static int bpf_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_magic = BPF_FS_MAGIC;
 	sb->s_op = &bpf_super_ops;
 	sb->s_xattr = bpf_fs_xattr_handlers;
-	sb->s_iflags |= SB_I_NOEXEC;
-	sb->s_iflags |= SB_I_NODEV;
 	sb->s_time_gran = 1;
 
 	inode = bpf_get_inode(sb, NULL, S_IFDIR | 0777);
@@ -1261,6 +1260,7 @@ static int bpf_init_fs_context(struct fs_context *fc)
 	opts->delegate_attachs = 0;
 
 	fc->s_fs_info = opts;
+	fc_init_pseudo(fc);
 	fc->ops = &bpf_context_ops;
 	return 0;
 }

-- 
2.53.0