On Fri, 21 Dec 2012 14:50:38 +0100 (CET)
Thomas Gleixner <tglx@xxxxxxxxxxxxx> wrote:
> Index: linux-stable/block/blk-ioc.c
> ===================================================================
> --- linux-stable.orig/block/blk-ioc.c
> +++ linux-stable/block/blk-ioc.c
> @@ -110,7 +110,7 @@ static void ioc_release_fn(struct work_s
> spin_unlock(q->queue_lock);
> } else {
> spin_unlock_irqrestore(&ioc->lock, flags);
> - cpu_relax();
> + cpu_chill();
> spin_lock_irqsave_nested(&ioc->lock, flags, 1);
> }
> }
> @@ -188,7 +188,7 @@ retry:
> spin_unlock(icq->q->queue_lock);
> } else {
> spin_unlock_irqrestore(&ioc->lock, flags);
> - cpu_relax();
> + cpu_chill();
> goto retry;
> }
> }
>
Thomas,
I had to add this to get -rt24 to compile:
commit cb25d4b84a6d8f155134f6d9aa2997a452ab1dca
Author: Clark Williams <williams@xxxxxxxxxx>
Date: Fri Dec 21 09:22:26 2012 -0600
[RT] pull in include/linux/delay.h to get cpu_chill()
Signed-off-by: Clark Williams <williams@xxxxxxxxxx>
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 2332787..fb21ad5 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -8,6 +8,7 @@
#include <linux/blkdev.h>
#include <linux/bootmem.h> /* for max_pfn/max_low_pfn */
#include <linux/slab.h>
+#include <linux/delay.h>
#include "blk.h"
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