Re: [PATCH 1/4] ramfs: free sb->s_fs_info after shutting down the super block

Al Viro
2023-08-31T06:26:29Z

On Thu, Aug 31, 2023 at 07:31:54AM +0200, Christoph Hellwig wrote:
> sb->s_fs_info can only be safely freed after generic_shutdown_super was
> called and all access to the super_block has stopped.
>
> Thus only free the private data after calling kill_litter_super, which
> calls generic_shutdown_super internally.

Take a look at what ramfs uses that thing for. Remount and ->show_options().
Neither is an issue in ->kill_sb(). I don't really hate that patch, but
commit message is flat-out incorrect in this case.