From: David S. Miller <davem@davemloft.net>
Date: Mon, 8 Apr 2019 02:12:12 +0000 (-0700)
Subject: Merge branch 'rhashtable-bitlocks'
X-Git-Tag: v5.2-rc1~133^2~222
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=9186c90bbb9525f46eddb590be26c749b5b1def7;p=uclinux-h8%2Flinux.git

Merge branch 'rhashtable-bitlocks'

NeilBrown says:

====================
Convert rhashtable to use bitlocks

This series converts rhashtable to use a per-bucket bitlock
rather than a separate array of spinlocks.
This:
  reduces memory usage
  results in slightly fewer memory accesses
  slightly improves parallelism
  makes a configuration option unnecessary

The main change from previous version is to use a distinct type for
the pointer in the bucket which has a bit-lock in it.  This
helped find two places where rht_ptr() was missed, one
in  rhashtable_free_and_destroy() in print_ht in the test code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
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9186c90bbb9525f46eddb590be26c749b5b1def7