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Subject[RFC 0/4] generic hashtable implementation
There are quite a few places in the kernel which implement a hashtable
in a very similar way. Instead of having implementations of a hashtable
all over the kernel, we can re-use the code.

This patch series introduces a very simple hashtable implementation, and
modifies three (random) modules to use it. I've limited it to 3 only
so that it would be easy to review and modify, and to show that even
at this number we already eliminate a big amount of duplicated code.

If this basic hashtable looks ok, future code will include:

- RCU support
- Self locking (list_bl?)
- Converting more code to use the hashtable

Sasha Levin (4):
hashtable: introduce a small and naive hashtable
user_ns: use new hashtable implementation
mm,ksm: use new hashtable implementation
workqueue: use new hashtable implementation

include/linux/hashtable.h | 46 ++++++++++++++++++++
include/linux/user_namespace.h | 11 +++--
kernel/user.c | 54 ++++-------------------
kernel/user_namespace.c | 4 +-
kernel/workqueue.c | 91 ++++++---------------------------------
mm/ksm.c | 29 ++++---------
6 files changed, 87 insertions(+), 148 deletions(-)
create mode 100644 include/linux/hashtable.h


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