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

Al Viro
2023-08-31T06:37:32Z

On Thu, Aug 31, 2023 at 07:31:57AM +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.

Same as for ramfs. We *do* use ->s_fs_info there, but only for
operations that require an active reference. They can't overlap
with ->kill_sb().