microblaze: signal: Declare do_notify_resume

Fix sparse warning by declaration do_notify_resume function
called from entry.S.
Warning:
arch/microblaze/kernel/signal.c:357:6: warning: symbol
'do_notify_resume' was not declared. Should it be static?
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/microblaze/include/asm/entry.h

@@ -29,6 +29,8 @@ DECLARE_PER_CPU(unsigned int, KM); /* Kernel/user mode */
 DECLARE_PER_CPU(unsigned int, ENTRY_SP); /* Saved SP on kernel entry */
 DECLARE_PER_CPU(unsigned int, R11_SAVE); /* Temp variable for entry */
 DECLARE_PER_CPU(unsigned int, CURRENT_SAVE); /* Saved current pointer */
+
+extern asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall);
 # endif /* __ASSEMBLY__ */
 
 #endif /* _ASM_MICROBLAZE_ENTRY_H */

arch/microblaze/kernel/signal.c

@@ -354,7 +354,7 @@ static void do_signal(struct pt_regs *regs, int in_syscall)
 	restore_saved_sigmask();
 }
 
-void do_notify_resume(struct pt_regs *regs, int in_syscall)
+asmlinkage void do_notify_resume(struct pt_regs *regs, int in_syscall)
 {
 	/*
 	 * We want the common case to go fast, which