[PATCH 1/4] omap: mailbox: convert rwlocks to spinlock

[Hiroshi DOYU]

From: Hiroshi DOYU <Hiroshi.DOYU at nokia.com>
Subject: Re: [PATCH 1/4] omap: mailbox: convert rwlocks to spinlock
Date: Mon, 10 May 2010 13:40:14 +0300 (EEST)

> Hi Felipe,
> 
> From: ext Felipe Contreras <felipe.contreras at gmail.com>
> Subject: Re: [PATCH 1/4] omap: mailbox: convert rwlocks to spinlock
> Date: Mon, 10 May 2010 12:12:52 +0200
> 
>> On Mon, May 10, 2010 at 12:16 PM, Hiroshi DOYU <Hiroshi.DOYU at nokia.com> wrote:
>>> From: Ohad Ben-Cohen <ohad at wizery.com>
>>>
>>> rwlocks are slower and have potential starvation issues
>>> therefore spinlocks are generally preferred.
>>>
>>> see also: http://lwn.net/Articles/364583/
>>>
>>> Signed-off-by: Ohad Ben-Cohen <ohad at wizery.com>
>>> Signed-off-by: Kanigeri Hari <h-kanigeri2 at ti.com>
>>> Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU at nokia.com>
>> 
>> There's no cover letter, so I'll comment here.
>> 
>> What about these patches?
>> http://article.gmane.org/gmane.linux.ports.arm.omap/31208
> 
> OK, I'll incorporate them and send patches again.

The above has been sent to LAKML by Tony a while ago. I just rebased
Ohad's ones on the top of Fernando's.

The following changes since commit b57f95a38233a2e73b679bea4a5453a1cc2a1cc9:

  Linux 2.6.34-rc7 (2010-05-09 18:36:28 -0700)

are available in the git repository at:
  git://gitorious.org/~doyu/lk/mainline.git v2.6.34-rc7.mailbox

Fernando Guzman Lugo (4):
      Mailbox: free mailbox interrupt before freeing blk queue
      Mailbox: flush pending deferred works before freeing blk queue
      Mailbox: Check valid registered callback before calling
      Mailbox: disable mailbox interrupt when request queue

Hiroshi DOYU (1):
      Mailbox: new mutext lock for h/w mailbox configuration

Ohad Ben-Cohen (4):
      omap: mailbox: convert rwlocks to spinlock
      omap: mailbox cleanup: split MODULE_AUTHOR line
      omap: mailbox: remove (un)likely macros from cold paths
      omap: mailbox: convert block api to kfifo

 arch/arm/mach-omap2/mailbox.c             |    3 +-
 arch/arm/plat-omap/Kconfig                |    9 ++
 arch/arm/plat-omap/include/plat/mailbox.h |    4 +-
 arch/arm/plat-omap/mailbox.c              |  169 ++++++++++++++---------------
 4 files changed, 97 insertions(+), 88 deletions(-)