lib/syscall.c: unexport task_current_syscall()

It is only used by procfs and procfs cannot be a module.

Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

lib/syscall.c

···
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(task_current_syscall);