From: Christoph Lameter <cl@linux-foundation.org>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Tejun Heo <tj@kernel.org>
Cc: linux-kernel@vger.kernel.org
Subject: [RFC local_t removal V1 0/4] Remove local_t
Date: Tue, 05 Jan 2010 16:04:17 -0600 [thread overview]
Message-ID: <20100105220417.400092933@quilx.com> (raw)
Current -next has only the trace subsystem left as a user of local_t
Tracing uses local_t for per cpu safe atomic operations in the form
of cmpxchg and additions. We already have a cmpxchg_local but no "local"
form of addition.
The patchset introduces a similar local primitive add_local() and then
uses cmpxchg_local() and add_local() to remove local_t use from the
trace subsystem.
The last patch removes local_t support from the kernel tree.
The support for add_local() is pretty basic. We can add more
fancy inc/dec variants and more optimization in the next
revision of the patchset.
next reply other threads:[~2010-01-05 22:05 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-05 22:04 Christoph Lameter [this message]
2010-01-05 22:04 ` [RFC local_t removal V1 1/4] Add add_local() and add_local_return() Christoph Lameter
2010-01-05 22:17 ` Mike Frysinger
2010-01-05 22:29 ` Christoph Lameter
2010-01-06 19:23 ` Mike Frysinger
2010-01-07 17:03 ` Christoph Lameter
2010-01-05 22:49 ` Mathieu Desnoyers
2010-01-07 13:45 ` Arnd Bergmann
2010-01-07 13:57 ` Mathieu Desnoyers
2010-01-07 14:22 ` Arnd Bergmann
2010-01-07 17:07 ` Christoph Lameter
2010-01-05 22:04 ` [RFC local_t removal V1 2/4] Replace local_t use in trace subsystem Christoph Lameter
2010-01-05 22:57 ` Mathieu Desnoyers
2010-01-07 17:15 ` Christoph Lameter
2010-01-14 2:56 ` Steven Rostedt
2010-01-14 14:49 ` Christoph Lameter
2010-01-05 22:04 ` [RFC local_t removal V1 3/4] Optimized add_local() Christoph Lameter
2010-01-05 22:59 ` Mathieu Desnoyers
2010-01-07 17:16 ` Christoph Lameter
2010-01-05 22:04 ` [RFC local_t removal V1 4/4] Remove local_t support Christoph Lameter
2010-01-05 22:23 ` [RFC local_t removal V1 0/4] Remove local_t Mathieu Desnoyers
2010-01-05 22:34 ` Christoph Lameter
2010-01-05 22:45 ` Mathieu Desnoyers
2010-01-07 17:05 ` Christoph Lameter
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