Re: [PATCH RFC 14/41] debugfs: use fc_init_pseudo()

[Alexander Mikhalitsyn <alex@xxxxxxxxxxxx>]

On Tue, 2026-11-10 at 10:14 +0100, Christian Brauner wrote:
> Initialize debugfs as a pseudo filesystem. This raises SB_I_PSEUDO
> and
> also SB_I_NOEXEC and SB_I_NODEV. debugfs never holds executables or
> device nodes.
> 
> SB_I_NOEXEC also refuses PROT_EXEC mappings. The debugfs files that
> can be mapped, kcov, relay channels and powernv's memtrace, map data.
> 
> Signed-off-by: Christian Brauner (Amutable) <brauner@xxxxxxxxxx>

Reviewed-by: Alexander Mikhalitsyn <alex@xxxxxxxxxxxx>

> ---
>  fs/debugfs/inode.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
> index b4915551ad31..f163f0bc5703 100644
> --- a/fs/debugfs/inode.c
> +++ b/fs/debugfs/inode.c
> @@ -15,6 +15,7 @@
>  #include <linux/module.h>
>  #include <linux/fs.h>
>  #include <linux/fs_context.h>
> +#include <linux/pseudo_fs.h>
>  #include <linux/fs_parser.h>
>  #include <linux/pagemap.h>
>  #include <linux/init.h>
> @@ -317,6 +318,7 @@ static int debugfs_init_fs_context(struct
> fs_context *fc)
>       fsi->mode = DEBUGFS_DEFAULT_MODE;
>  
>       fc->s_fs_info = fsi;
> +     fc_init_pseudo(fc);
>       fc->ops = &debugfs_context_ops;
>       return 0;
>  }