[PATCH] gcc4 compile fix for recent ia64 xpc changes

Gcc4 doesn't like volatile casts as lvalues.  Make the structure members
volatile instead.

Signed-off-by: Dave Jones <davej@redhat.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 13 insertions, 13 deletions

diff --git a/arch/ia64/sn/kernel/xpc.h b/arch/ia64/sn/kernel/xpc.h
index 1a0aed8490d1..d0ee635daf2e 100644
--- a/arch/ia64/sn/kernel/xpc.h
+++ b/arch/ia64/sn/kernel/xpc.h
@@ -87,7 +87,7 @@ struct xpc_rsvd_page {
         u8 partid;              /* partition ID from SAL */
         u8 version;
         u8 pad[6];              /* pad to u64 align */
-        u64 vars_pa;
+        volatile u64 vars_pa;
         u64 part_nasids[XP_NASID_MASK_WORDS] ____cacheline_aligned;
         u64 mach_nasids[XP_NASID_MASK_WORDS] ____cacheline_aligned;
 };
@@ -138,7 +138,7 @@ struct xpc_vars {
  * occupies half a cacheline.
  */
 struct xpc_vars_part {
-        u64 magic;
+        volatile u64 magic;
 
         u64 openclose_args_pa;  /* physical address of open and close args */
         u64 GPs_pa;             /* physical address of Get/Put values */
@@ -185,8 +185,8 @@ struct xpc_vars_part {
  * Define a Get/Put value pair (pointers) used with a message queue.
  */
 struct xpc_gp {
-        s64 get;        /* Get value */
-        s64 put;        /* Put value */
+        volatile s64 get;       /* Get value */
+        volatile s64 put;       /* Put value */
 };
 
 #define XPC_GP_SIZE \
@@ -231,7 +231,7 @@ struct xpc_openclose_args {
  */
 struct xpc_notify {
         struct semaphore sema;          /* notify semaphore */
-        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 */
@@ -439,7 +439,7 @@ struct xpc_partition {
 
         /* XPC infrastructure referencing and teardown control */
 
-        u8 setup_state;                 /* infrastructure setup state */
+        volatile u8 setup_state;                        /* infrastructure setup state */
         wait_queue_head_t teardown_wq;  /* kthread waiting to teardown infra */
         atomic_t references;            /* #of references to infrastructure */
 
diff --git a/arch/ia64/sn/kernel/xpc_channel.c b/arch/ia64/sn/kernel/xpc_channel.c
index 0bf6fbcc46d2..6d02dac8056f 100644
--- a/arch/ia64/sn/kernel/xpc_channel.c
+++ b/arch/ia64/sn/kernel/xpc_channel.c
@@ -209,7 +209,7 @@ xpc_setup_infrastructure(struct xpc_partition *part)
          * With the setting of the partition setup_state to XPC_P_SETUP, we're
          * declaring that this partition is ready to go.
          */
-        (volatile u8) part->setup_state = XPC_P_SETUP;
+        part->setup_state = XPC_P_SETUP;
 
 
         /*
@@ -227,7 +227,7 @@ xpc_setup_infrastructure(struct xpc_partition *part)
         xpc_vars_part[partid].IPI_phys_cpuid =
                                         cpu_physical_id(smp_processor_id());
         xpc_vars_part[partid].nchannels = part->nchannels;
-        (volatile u64) xpc_vars_part[partid].magic = XPC_VP_MAGIC1;
+        xpc_vars_part[partid].magic = XPC_VP_MAGIC1;
 
         return xpcSuccess;
 }
@@ -355,7 +355,7 @@ xpc_pull_remote_vars_part(struct xpc_partition *part)
 
                 /* let the other side know that we've pulled their variables */
 
-                (volatile u64) xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
+                xpc_vars_part[partid].magic = XPC_VP_MAGIC2;
         }
 
         if (pulled_entry->magic == XPC_VP_MAGIC1) {
@@ -1183,7 +1183,7 @@ xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
                  */
                 xpc_clear_local_msgqueue_flags(ch);
 
-                (volatile s64) ch->w_remote_GP.get = ch->remote_GP.get;
+                ch->w_remote_GP.get = ch->remote_GP.get;
 
                 dev_dbg(xpc_chan, "w_remote_GP.get changed to %ld, partid=%d, "
                         "channel=%d\n", ch->w_remote_GP.get, ch->partid,
@@ -1211,7 +1211,7 @@ xpc_process_msg_IPI(struct xpc_partition *part, int ch_number)
                  */
                 xpc_clear_remote_msgqueue_flags(ch);
 
-                (volatile s64) ch->w_remote_GP.put = ch->remote_GP.put;
+                ch->w_remote_GP.put = ch->remote_GP.put;
 
                 dev_dbg(xpc_chan, "w_remote_GP.put changed to %ld, partid=%d, "
                         "channel=%d\n", ch->w_remote_GP.put, ch->partid,
@@ -1875,7 +1875,7 @@ xpc_send_msg(struct xpc_channel *ch, struct xpc_msg *msg, u8 notify_type,
                 notify = &ch->notify_queue[msg_number % ch->local_nentries];
                 notify->func = func;
                 notify->key = key;
-                (volatile u8) notify->type = notify_type;
+                notify->type = notify_type;
 
                 // >>> is a mb() needed here?
 
diff --git a/arch/ia64/sn/kernel/xpc_partition.c b/arch/ia64/sn/kernel/xpc_partition.c
index cd7ed73f0e7a..578265ea9e67 100644
--- a/arch/ia64/sn/kernel/xpc_partition.c
+++ b/arch/ia64/sn/kernel/xpc_partition.c
@@ -253,7 +253,7 @@ xpc_rsvd_page_init(void)
          * This signifies to the remote partition that our reserved
          * page is initialized.
          */
-        (volatile u64) rp->vars_pa = __pa(xpc_vars);
+        rp->vars_pa = __pa(xpc_vars);
 
         return rp;
 }