Revision 33844e665104b169a3a7732bdcddb40e4f82b335 authored by Al Viro on 22 December 2016, 02:55:02 UTC, committed by Al Viro on 23 December 2016, 04:00:22 UTC
Problem similar to ones dealt with in "fold checks into iterate_and_advance()" and followups, except that in this case we really want to do nothing when asked for zero-length operation - unlike zero-length iterate_and_advance(), zero-length iterate_all_kinds() has no side effects, and callers are simpler that way. That got exposed when copy_from_iter_full() had been used by tipc, which builds an msghdr with zero payload and (now) feeds it to a primitive based on iterate_all_kinds() instead of iterate_and_advance(). Reported-by: Jon Maloy <jon.maloy@ericsson.com> Tested-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Kconfig
config CONFIGFS_FS
tristate "Userspace-driven configuration filesystem"
select SYSFS
help
configfs is a RAM-based filesystem that provides the converse
of sysfs's functionality. Where sysfs is a filesystem-based
view of kernel objects, configfs is a filesystem-based manager
of kernel objects, or config_items.
Both sysfs and configfs can and should exist together on the
same system. One is not a replacement for the other.
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