[IA64-SGI] sn2 mutex conversion

Migrate sn2 code to use mutex and completion events rather than
semaphores.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 7 insertions, 5 deletions

diff --git a/include/asm-ia64/sn/xp.h b/include/asm-ia64/sn/xp.h
index 203945ae034e..9bd2f9bf329b 100644
--- 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>
 
@@ -359,7 +360,7 @@ 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 */
diff --git a/include/asm-ia64/sn/xpc.h b/include/asm-ia64/sn/xpc.h
index 87e9cd588510..0c36928ffd8b 100644
--- a/include/asm-ia64/sn/xpc.h
+++ b/include/asm-ia64/sn/xpc.h
@@ -19,6 +19,8 @@
 #include <linux/interrupt.h>
 #include <linux/sysctl.h>
 #include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/completion.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/sn/bte.h>
@@ -335,8 +337,7 @@ struct xpc_openclose_args {
  * and consumed by the intended recipient.
  */
 struct xpc_notify {
-        struct semaphore sema;          /* notify semaphore */
-        volatile u8 type;                       /* type of notification */
+        volatile u8 type;               /* type of notification */
 
         /* the following two fields are only used if type == XPC_N_CALL */
         xpc_notify_func func;           /* user's notify function */
@@ -465,8 +466,8 @@ struct xpc_channel {
         xpc_channel_func func;          /* user's channel function */
         void *key;                      /* pointer to user's key */
 
-        struct semaphore msg_to_pull_sema; /* next msg to pull serialization */
-        struct semaphore wdisconnect_sema; /* wait for channel disconnect */
+        struct mutex msg_to_pull_mutex; /* next msg to pull serialization */
+        struct completion wdisconnect_wait; /* wait for channel disconnect */
 
         struct xpc_openclose_args *local_openclose_args; /* args passed on */
                                         /* opening or closing of channel */