Ohad,
Looks like the conversion was missed in few places resulting in compile
warnings.
Please see the below fix. Let me know if you agree with the change.
#########
[PATCH] omap: mailbox: rwlocks to spinlock: compilation fix
fixed the missed rwlocks in few places resultion in following
compiler warning.
arch/arm/plat-omap/mailbox.c: In function 'omap_mbox_startup':
arch/arm/plat-omap/mailbox.c:246: warning: passing argument 1 of
'_raw_write_lock' from incompatible pointer type
arch/arm/plat-omap/mailbox.c:251: warning: passing argument 1 of
'_raw_write_unlock' from incompatible pointer type
arch/arm/plat-omap/mailbox.c:255: warning: passing argument 1 of
'_raw_write_unlock' from incompatible pointer type
arch/arm/plat-omap/mailbox.c: In function 'omap_mbox_fini':
arch/arm/plat-omap/mailbox.c:301: warning: passing argument 1 of
'_raw_write_lock' from incompatible pointer type
arch/arm/plat-omap/mailbox.c:306: warning: passing argument 1 of
'_raw_write_unlock' from incompatible pointer type
Signed-off-by: Hari Kanigeri <h-kanige...@ti.com>
---
arch/arm/plat-omap/mailbox.c | 10 +++++-----
1 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index 27a8d98..d6a700d 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -243,16 +243,16 @@ static int omap_mbox_startup(struct omap_mbox *mbox)
struct omap_mbox_queue *mq;
if (likely(mbox->ops->startup)) {
- write_lock(&mboxes_lock);
+ spin_lock(&mboxes_lock);
if (!mbox_configured)
ret = mbox->ops->startup(mbox);
if (unlikely(ret)) {
- write_unlock(&mboxes_lock);
+ spin_unlock(&mboxes_lock);
return ret;
}
mbox_configured++;
- write_unlock(&mboxes_lock);
+ spin_unlock(&mboxes_lock);
}
ret = request_irq(mbox->irq, mbox_interrupt, IRQF_SHARED,
@@ -298,12 +298,12 @@ static void omap_mbox_fini(struct omap_mbox *mbox)
free_irq(mbox->irq, mbox);
if (likely(mbox->ops->shutdown)) {
- write_lock(&mboxes_lock);
+ spin_lock(&mboxes_lock);
if (mbox_configured > 0)
mbox_configured--;
if (!mbox_configured)
mbox->ops->shutdown(mbox);
- write_unlock(&mboxes_lock);
+ spin_unlock(&mboxes_lock);
}
}
--
################
> -----Original Message-----
> From: Ohad Ben-Cohen [mailto:o...@wizery.com]
> Sent: Tuesday, April 27, 2010 12:56 PM
> To: linux-omap@vger.kernel.org
> Cc: Kanigeri, Hari; Hiroshi Doyu; Ohad Ben-Cohen
> Subject: [PATCH 1/4] omap: mailbox cleanup: convert rwlocks
> to spinlock
>
> rwlocks are slower and have potential starvation issues so
> spinlocks are generally preferred
>
> Signed-off-by: Ohad Ben-Cohen <o...@wizery.com>
> ---
> arch/arm/plat-omap/mailbox.c | 20 ++++++++++----------
> 1 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/arch/arm/plat-omap/mailbox.c
> b/arch/arm/plat-omap/mailbox.c index 08a2df7..d73d51a 100644
> --- a/arch/arm/plat-omap/mailbox.c
> +++ b/arch/arm/plat-omap/mailbox.c
> @@ -31,7 +31,7 @@
>
> static struct workqueue_struct *mboxd;
> static struct omap_mbox *mboxes;
> -static DEFINE_RWLOCK(mboxes_lock);
> +static DEFINE_SPINLOCK(mboxes_lock);
>
> static int mbox_configured;
>
> @@ -330,14 +330,14 @@ struct omap_mbox *omap_mbox_get(const
> char *name)
> struct omap_mbox *mbox;
> int ret;
>
> - read_lock(&mboxes_lock);
> + spin_lock(&mboxes_lock);
> mbox = *(find_mboxes(name));
> if (mbox == NULL) {
> - read_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
> return ERR_PTR(-ENOENT);
> }
>
> - read_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
>
> ret = omap_mbox_startup(mbox);
> if (ret)
> @@ -363,15 +363,15 @@ int omap_mbox_register(struct device
> *parent, struct omap_mbox *mbox)
> if (mbox->next)
> return -EBUSY;
>
> - write_lock(&mboxes_lock);
> + spin_lock(&mboxes_lock);
> tmp = find_mboxes(mbox->name);
> if (*tmp) {
> ret = -EBUSY;
> - write_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
> goto err_find;
> }
> *tmp = mbox;
> - write_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
>
> return 0;
>
> @@ -384,18 +384,18 @@ int omap_mbox_unregister(struct
> omap_mbox *mbox) {
> struct omap_mbox **tmp;
>
> - write_lock(&mboxes_lock);
> + spin_lock(&mboxes_lock);
> tmp = &mboxes;
> while (*tmp) {
> if (mbox == *tmp) {
> *tmp = mbox->next;
> mbox->next = NULL;
> - write_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
> return 0;
> }
> tmp = &(*tmp)->next;
> }
> - write_unlock(&mboxes_lock);
> + spin_unlock(&mboxes_lock);
>
> return -EINVAL;
> }
> --
> 1.6.3.3
>
> --
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