tree c4733f4ce2a6d1aab32eda3c096c97f0365a43f8
parent 489447380a2921ec0e9154f773c44ab3167ede4b
author Eric Dumazet <dada1@cosmosbay.com> 1138598375 +0100
committer Greg Kroah-Hartman <gregkh@suse.de> 1142890977 -0800

[PATCH] kref: avoid an atomic operation in kref_put()

Avoid an atomic operation in kref_put() when the last reference is
dropped. On most platforms, atomic_read() is a plan read of the counter
and involves no atomic at all.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>