Reiser4 for Linux-5.12

[Edward Shishkin <edward.shishkin@xxxxxxxxx>]

5.11 -> 5.12:

. Implement ->read_iter(), get rid of deprecated ->read() file operation
. Port for Linux-5.12
  . Macro BIO_MAX_PAGES has gone;
  . The following methods got a new argument struct user_namespace *:
    . reiser4_setattr_common
    . reiser4_getattr_common
    . reiser4_create_common
    . reiser4_symlink_common
    . reiser4_mkdir_common
    . reiser4_mknod_common
    . reiser4_permission_common
    . reiser4_rename2_common

Find at
https://sourceforge.net/projects/reiser4/files/reiser4-for-linux-5.x/