[SPARC]: Include linux/linkage.h in asm/unistd.h

include/asm-sparc/unistd.h

@@ -453,6 +453,8 @@ static __inline__ _syscall1(int,close,int,fd)
 static __inline__ _syscall1(int,_exit,int,exitcode)
 static __inline__ _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
 
+#include <linux/linkage.h>
+
 asmlinkage unsigned long sys_mmap(
 				unsigned long addr, unsigned long len,
 				unsigned long prot, unsigned long flags,

include/asm-sparc64/unistd.h

@@ -443,6 +443,8 @@ static __inline__ _syscall1(int,close,int,fd)
 static __inline__ _syscall1(int,_exit,int,exitcode)
 static __inline__ _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
 
+#include <linux/linkage.h>
+
 asmlinkage unsigned long sys_mmap(
 				unsigned long addr, unsigned long len,
 				unsigned long prot, unsigned long flags,