Hi Fernando,
On Wed, 2010-02-10 at 09:32 +0100, ext Guzman Lugo, Fernando wrote:
> Please discard previous one.
>
> Regards,
> Fernando.
>
> From 6bcdc02f6265246e385194433775e75db7ad44cf Mon Sep 17 00:00:00 2001
> From: Fernando Guzman Lugo <x0095840@xxxxxx>
> Date: Wed, 10 Feb 2010 02:31:40 -0600
> Subject: [PATCH] DSPBRIDGE: Adding protection Resource cleanup linked lists
>
> This patch protects the Resorce cleanup lists from
> concurrent access
>
> Signed-off-by: Fernando Guzman Lugo <x0095840@xxxxxx>
> ---
> arch/arm/plat-omap/include/dspbridge/drv.h | 3 +
> drivers/dsp/bridge/pmgr/wcd.c | 16 ++++++-
> drivers/dsp/bridge/rmgr/drv.c | 71 +++++++++++++++++++++++----
> drivers/dsp/bridge/rmgr/drv_interface.c | 8 ++-
> 4 files changed, 83 insertions(+), 15 deletions(-)
>
> diff --git a/arch/arm/plat-omap/include/dspbridge/drv.h b/arch/arm/plat-omap/include/dspbridge/drv.h
> index b6a5fd2..b044291 100644
> --- a/arch/arm/plat-omap/include/dspbridge/drv.h
> +++ b/arch/arm/plat-omap/include/dspbridge/drv.h
> @@ -137,15 +137,18 @@ struct PROCESS_CONTEXT{
>
> /* DSP Node resources */
> struct NODE_RES_OBJECT *pNodeList;
> + struct mutex node_mutex;
>
> /* DMM resources */
> struct DMM_RES_OBJECT *pDMMList;
> + struct mutex dmm_mutex;
>
> /* DSP Heap resources */
> struct DSPHEAP_RES_OBJECT *pDSPHEAPList;
>
> /* Stream resources */
> struct STRM_RES_OBJECT *pSTRMList;
> + struct mutex strm_mutex;
> } ;
Is there a specific reason for using mutex instead of spin_lock?
AFAIU these locks are help for very short time, for inserting / removing
elements from linked list, or traversing a linked list.
Cheers,
Ameya.
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