um: export signals_enabled directly

Use signals_enabled instead of always jumping through
a function call to read it, there's not much point in
that.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/include/asm/irqflags.h

@@ -2,15 +2,15 @@
 #ifndef __UM_IRQFLAGS_H
 #define __UM_IRQFLAGS_H
 
-extern int get_signals(void);
-extern int set_signals(int enable);
-extern void block_signals(void);
-extern void unblock_signals(void);
+extern int signals_enabled;
+int set_signals(int enable);
+void block_signals(void);
+void unblock_signals(void);
 
 #define arch_local_save_flags arch_local_save_flags
 static inline unsigned long arch_local_save_flags(void)
 {
-	return get_signals();
+	return signals_enabled;
 }
 
 #define arch_local_irq_restore arch_local_irq_restore

arch/um/include/shared/longjmp.h

@@ -5,6 +5,7 @@
 #include <sysdep/archsetjmp.h>
 #include <os.h>
 
+extern int signals_enabled;
 extern int setjmp(jmp_buf);
 extern void longjmp(jmp_buf, int);
 
@@ -13,9 +14,8 @@ extern void longjmp(jmp_buf, int);
 } while(0)
 
 #define UML_SETJMP(buf) ({				\
-	int n;	   \
-	volatile int enable;	\
-	enable = get_signals(); \
+	int n, enable;					\
+	enable = *(volatile int *)&signals_enabled;	\
 	n = setjmp(*buf);				\
 	if(n != 0)					\
 		set_signals_trace(enable);		\

arch/um/include/shared/os.h

@@ -237,7 +237,6 @@ extern void send_sigio_to_self(void);
 extern int change_sig(int signal, int on);
 extern void block_signals(void);
 extern void unblock_signals(void);
-extern int get_signals(void);
 extern int set_signals(int enable);
 extern int set_signals_trace(int enable);
 extern int os_is_signal_stack(void);

arch/um/kernel/ksyms.c

@@ -7,7 +7,7 @@
 #include <os.h>
 
 EXPORT_SYMBOL(set_signals);
-EXPORT_SYMBOL(get_signals);
+EXPORT_SYMBOL(signals_enabled);
 
 EXPORT_SYMBOL(os_stat_fd);
 EXPORT_SYMBOL(os_stat_file);

arch/um/os-Linux/signal.c

@@ -62,7 +62,7 @@ static void sig_handler_common(int sig, struct siginfo *si, mcontext_t *mc)
 #define SIGALRM_BIT 1
 #define SIGALRM_MASK (1 << SIGALRM_BIT)
 
-static int signals_enabled;
+int signals_enabled;
 static unsigned int signals_pending;
 static unsigned int signals_active = 0;
 
@@ -334,11 +334,6 @@ void unblock_signals(void)
 	}
 }
 
-int get_signals(void)
-{
-	return signals_enabled;
-}
-
 int set_signals(int enable)
 {
 	int ret;