Pull ec into release branch

[powerpc.git] / include / asm-ia64 / sn / xp.h

diff --git a/include/asm-ia64/sn/xp.h b/include/asm-ia64/sn/xp.h
index 203945a..6f807e0 100644 (file)
--- a/include/asm-ia64/sn/xp.h
+++ b/include/asm-ia64/sn/xp.h
@@ -18,6 +18,7 @@
 
 #include <linux/cache.h>
 #include <linux/hardirq.h>
+#include <linux/mutex.h>
 #include <asm/sn/types.h>
 #include <asm/sn/bte.h>
 
@@ -59,23 +60,37 @@
  * the bte_copy() once in the hope that the failure was due to a temporary
  * aberration (i.e., the link going down temporarily).
  *
- * See bte_copy for definition of the input parameters.
+ *     src - physical address of the source of the transfer.
+ *     vdst - virtual address of the destination of the transfer.
+ *     len - number of bytes to transfer from source to destination.
+ *     mode - see bte_copy() for definition.
+ *     notification - see bte_copy() for definition.
  *
  * Note: xp_bte_copy() should never be called while holding a spinlock.
  */
 static inline bte_result_t
-xp_bte_copy(u64 src, u64 dest, u64 len, u64 mode, void *notification)
+xp_bte_copy(u64 src, u64 vdst, u64 len, u64 mode, void *notification)
 {
        bte_result_t ret;
+       u64 pdst = ia64_tpa(vdst);
 
 
-       ret = bte_copy(src, dest, len, mode, notification);
+       /*
+        * Ensure that the physically mapped memory is contiguous.
+        *
+        * We do this by ensuring that the memory is from region 7 only.
+        * If the need should arise to use memory from one of the other
+        * regions, then modify the BUG_ON() statement to ensure that the
+        * memory from that region is always physically contiguous.
+        */
+       BUG_ON(REGION_NUMBER(vdst) != RGN_KERNEL);
 
+       ret = bte_copy(src, pdst, len, mode, notification);
        if (ret != BTE_SUCCESS) {
                if (!in_interrupt()) {
                        cond_resched();
                }
-               ret = bte_copy(src, dest, len, mode, notification);
+               ret = bte_copy(src, pdst, len, mode, notification);
        }
 
        return ret;
@@ -359,7 +374,7 @@ typedef void (*xpc_notify_func)(enum xpc_retval reason, partid_t partid,
  * the channel.
  */
 struct xpc_registration {
-       struct semaphore sema;
+       struct mutex mutex;
        xpc_channel_func func;          /* function to call */
        void *key;                      /* pointer to user's key */
        u16 nentries;                   /* #of msg entries in local msg queue */