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(parent: c9a9c73) | patch
mm: remove useless rcu lock-unlock from mapping_tagged()
authorKonstantin Khlebnikov <khlebnikov@openvz.org>
Tue, 26 Jul 2011 00:12:31 +0000 (17:12 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 26 Jul 2011 03:57:11 +0000 (20:57 -0700)
commit2c6437773ae64c8371cef9d4ae69efb01cdc2592
tree4efc95eb0aaade090bac42e72c5973ada6d2cdb1tree | snapshot
parentc9a9c73e8d3040bcae91e9529b4757f1a6a448f5commit | diff
mm: remove useless rcu lock-unlock from mapping_tagged()

radix_tree_tagged() is lockless - it reads from a member of the raid-tree
root node.  It does not require any protection.

Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/page-writeback.c diff | blob | history
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