sparc64: prepare signal_64 for unification

o add a sparc32 only definition
o fix a few style issues (white space errors etc).
o include compiler.h (for __user)
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/include/asm/signal_64.h

-#ifndef _ASMSPARC64_SIGNAL_H
-#define _ASMSPARC64_SIGNAL_H
+#ifndef __SPARC_SIGNAL_H
+#define __SPARC_SIGNAL_H
 
 #include <asm/sigcontext.h>
+#include <linux/compiler.h>
 
 #ifdef __KERNEL__
 #ifndef __ASSEMBLY__
@@ -156,6 +157,21 @@ struct sigstack {
 #define MINSIGSTKSZ	4096
 #define SIGSTKSZ	16384
 
+#ifdef __KERNEL__
+/*
+ * DJHR
+ * SA_STATIC_ALLOC is used for the sparc32 system to indicate that this
+ * interrupt handler's irq structure should be statically allocated
+ * by the request_irq routine.
+ * The alternative is that arch/sparc/kernel/irq.c has carnal knowledge
+ * of interrupt usage and that sucks. Also without a flag like this
+ * it may be possible for the free_irq routine to attempt to free
+ * statically allocated data.. which is NOT GOOD.
+ *
+ */
+#define SA_STATIC_ALLOC         0x8000
+#endif
+
 #include <asm-generic/signal.h>
 
 struct __new_sigaction {
@@ -191,4 +207,4 @@ struct k_sigaction {
 
 #endif /* !(__ASSEMBLY__) */
 
-#endif /* !(_ASMSPARC64_SIGNAL_H) */
+#endif /* !(__SPARC_SIGNAL_H) */