Kernel/LibC: Implement sched_yield

kernel/include/kernel/Process.h

@@ -182,6 +182,7 @@ namespace Kernel
 		BAN::ErrorOr<long> sys_sigpending(sigset_t* set);
 		BAN::ErrorOr<long> sys_sigprocmask(int how, const sigset_t* set, sigset_t* oset);
 
+		BAN::ErrorOr<long> sys_yield();
 		BAN::ErrorOr<long> sys_pthread_create(const pthread_attr_t* __restrict attr, void (*entry)(void*), void* arg);
 		BAN::ErrorOr<long> sys_pthread_exit(void* value);
 		BAN::ErrorOr<long> sys_pthread_self();

kernel/kernel/Process.cpp

@@ -2084,6 +2084,12 @@ namespace Kernel
 		return 0;
 	}
 
+	BAN::ErrorOr<long> Process::sys_yield()
+	{
+		Processor::yield();
+		return 0;
+	}
+
 	BAN::ErrorOr<long> Process::sys_pthread_create(const pthread_attr_t* __restrict attr, void (*entry)(void*), void* arg)
 	{
 		if (attr != nullptr)