[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>
diff --git a/arch/ia64/sn/kernel/xpc.h b/arch/ia64/sn/kernel/xpc.h
index 1a0aed8..d0ee635 100644
--- a/arch/ia64/sn/kernel/xpc.h
+++ b/arch/ia64/sn/kernel/xpc.h
@@ -87,7 +87,7 @@
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 @@
* 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 @@
* 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_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 @@
/* 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 */