Kernel/LibC: Take fcntl extra field as uintptr_t

This allows passing pointers to fcntl

kernel/include/kernel/OpenFileDescriptorSet.h

@@ -33,7 +33,7 @@ namespace Kernel
 
 		BAN::ErrorOr<int> dup2(int, int);
 
-		BAN::ErrorOr<int> fcntl(int fd, int cmd, int extra);
+		BAN::ErrorOr<int> fcntl(int fd, int cmd, uintptr_t extra);
 
 		BAN::ErrorOr<off_t> seek(int fd, off_t offset, int whence);
 		BAN::ErrorOr<off_t> tell(int) const;

kernel/include/kernel/Process.h

@@ -149,7 +149,7 @@ namespace Kernel
 		BAN::ErrorOr<long> sys_pipe(int fildes[2]);
 		BAN::ErrorOr<long> sys_dup2(int fildes, int fildes2);
 
-		BAN::ErrorOr<long> sys_fcntl(int fildes, int cmd, int extra);
+		BAN::ErrorOr<long> sys_fcntl(int fildes, int cmd, uintptr_t extra);
 
 		BAN::ErrorOr<long> sys_seek(int fd, off_t offset, int whence);
 		BAN::ErrorOr<long> sys_tell(int fd);

kernel/kernel/OpenFileDescriptorSet.cpp

@@ -217,7 +217,7 @@ namespace Kernel
 		return fildes;
 	}
 
-	BAN::ErrorOr<int> OpenFileDescriptorSet::fcntl(int fd, int cmd, int extra)
+	BAN::ErrorOr<int> OpenFileDescriptorSet::fcntl(int fd, int cmd, uintptr_t extra)
 	{
 		LockGuard _(m_mutex);
 

kernel/kernel/Process.cpp

@@ -1997,7 +1997,7 @@ namespace Kernel
 		return TRY(m_open_file_descriptors.dup2(fildes, fildes2));
 	}
 
-	BAN::ErrorOr<long> Process::sys_fcntl(int fildes, int cmd, int extra)
+	BAN::ErrorOr<long> Process::sys_fcntl(int fildes, int cmd, uintptr_t extra)
 	{
 		return TRY(m_open_file_descriptors.fcntl(fildes, cmd, extra));
 	}

userspace/libraries/LibC/fcntl.cpp

@@ -40,7 +40,7 @@ int fcntl(int fildes, int cmd, ...)
 
 	va_list args;
 	va_start(args, cmd);
-	int extra = va_arg(args, int);
+	uintptr_t extra = va_arg(args, uintptr_t);
 	va_end(args);
 
 	return syscall(SYS_FCNTL, fildes, cmd, extra);