Merge tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers

From Kukjin Kim, this branch adds device-tree support to the DMA controller
on the older Samsung SoCs. It also adds support for one of the missing SoCs
in the family (2410).

The driver has been Ack:ed by Vinod Koul, but is merged through here due
to dependencies with platform code.

* tag 's3c24xx-dma' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: S3C24XX: add dma pdata for s3c2410, s3c2440 and s3c2442
  dmaengine: s3c24xx-dma: add support for the s3c2410 type of controller
  ARM: S3C24XX: Fix possible dma selection warning
  ARM: SAMSUNG: set s3c24xx_dma_filter for s3c64xx-spi0 device
  ARM: S3C24XX: add platform-devices for new dma driver for s3c2412 and s3c2443
  dmaengine: add driver for Samsung s3c24xx SoCs
  ARM: S3C24XX: number the dma clocks
  + Linux 3.12-rc3

Signed-off-by: Olof Johansson <olof@lixom.net>

1 files changed, 12 insertions, 20 deletions

diff --git a/ipc/util.c b/ipc/util.c
index e829da9ed01f..fdb8ae740775 100644
--- a/ipc/util.c
+++ b/ipc/util.c
@@ -474,11 +474,6 @@ void ipc_free(void* ptr, int size)
                 kfree(ptr);
 }
 
-struct ipc_rcu {
-        struct rcu_head rcu;
-        atomic_t refcount;
-} ____cacheline_aligned_in_smp;
-
 /**
  *      ipc_rcu_alloc   -       allocate ipc and rcu space 
  *      @size: size desired
@@ -505,27 +500,24 @@ int ipc_rcu_getref(void *ptr)
         return atomic_inc_not_zero(&p->refcount);
 }
 
-/**
- * ipc_schedule_free - free ipc + rcu space
- * @head: RCU callback structure for queued work
- */
-static void ipc_schedule_free(struct rcu_head *head)
-{
-        vfree(container_of(head, struct ipc_rcu, rcu));
-}
-
-void ipc_rcu_putref(void *ptr)
+void ipc_rcu_putref(void *ptr, void (*func)(struct rcu_head *head))
 {
         struct ipc_rcu *p = ((struct ipc_rcu *)ptr) - 1;
 
         if (!atomic_dec_and_test(&p->refcount))
                 return;
 
-        if (is_vmalloc_addr(ptr)) {
-                call_rcu(&p->rcu, ipc_schedule_free);
-        } else {
-                kfree_rcu(p, rcu);
-        }
+        call_rcu(&p->rcu, func);
+}
+
+void ipc_rcu_free(struct rcu_head *head)
+{
+        struct ipc_rcu *p = container_of(head, struct ipc_rcu, rcu);
+
+        if (is_vmalloc_addr(p))
+                vfree(p);
+        else
+                kfree(p);
 }
 
 /**