Merge patch series "fscache/cachefiles: Some bugfixes"

Zizhi Wo <wozizhi@huawei.com> says:

This patchset mainly includes 5 fix patches about fscache/cachefiles.
The first patch fixes an issue with the incorrect return length, and the
fourth patch addresses a null pointer dereference issue with file.

* patches from https://lore.kernel.org/r/20241107110649.3980193-1-wozizhi@huawei.com:
  netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING
  cachefiles: Fix NULL pointer dereference in object->file
  cachefiles: Clean up in cachefiles_commit_tmpfile()
  cachefiles: Fix missing pos updates in cachefiles_ondemand_fd_write_iter()
  cachefiles: Fix incorrect length return value in cachefiles_ondemand_fd_write_iter()

Link: https://lore.kernel.org/r/20241107110649.3980193-1-wozizhi@huawei.com
Signed-off-by: Christian Brauner <brauner@kernel.org>