Kernel: Fix all compiler warnings.

Kernel/FileSystem/DiskBackedFileSystem.cpp

@@ -139,8 +139,9 @@ ByteBuffer DiskBackedFS::read_blocks(unsigned index, unsigned count) const
     return blocks;
 }
 
-void DiskBackedFS::set_block_size(unsigned block_size)
+void DiskBackedFS::set_block_size(int block_size)
 {
+    ASSERT(block_size > 0);
     if (block_size == m_block_size)
         return;
     m_block_size = block_size;

Kernel/FileSystem/DiskBackedFileSystem.h

@@ -17,7 +17,7 @@ public:
 protected:
     explicit DiskBackedFS(NonnullRefPtr<DiskDevice>&&);
 
-    void set_block_size(unsigned);
+    void set_block_size(int);
 
     ByteBuffer read_block(unsigned index) const;
     ByteBuffer read_blocks(unsigned index, unsigned count) const;

Kernel/FileSystem/ProcFS.cpp

@@ -294,7 +294,7 @@ ByteBuffer procfs$pid_vmo(InodeIdentifier identifier)
             region->vmo().name().characters(),
             &region->vmo(),
             region->vmo().ref_count());
-        for (size_t i = 0; i < region->vmo().page_count(); ++i) {
+        for (int i = 0; i < region->vmo().page_count(); ++i) {
             auto& physical_page = region->vmo().physical_pages()[i];
             builder.appendf("P%x%s(%u) ",
                 physical_page ? physical_page->paddr().get() : 0,

Kernel/Net/IPv4Socket.cpp

@@ -246,7 +246,7 @@ ssize_t IPv4Socket::recvfrom(FileDescription& description, void* buffer, size_t
         return ipv4_packet.payload_size();
     }
 
-    return protocol_receive(packet.data, buffer, buffer_length, flags, addr, addr_length);
+    return protocol_receive(packet.data, buffer, buffer_length, flags);
 }
 
 void IPv4Socket::did_receive(const IPv4Address& source_address, word source_port, ByteBuffer&& packet)

Kernel/Net/IPv4Socket.h

@@ -50,7 +50,7 @@ protected:
     int allocate_local_port_if_needed();
 
     virtual KResult protocol_bind() { return KSuccess; }
-    virtual int protocol_receive(const ByteBuffer&, void*, size_t, int, sockaddr*, socklen_t*) { return -ENOTIMPL; }
+    virtual int protocol_receive(const ByteBuffer&, void*, size_t, int) { return -ENOTIMPL; }
     virtual int protocol_send(const void*, int) { return -ENOTIMPL; }
     virtual KResult protocol_connect(FileDescription&, ShouldBlock) { return KSuccess; }
     virtual int protocol_allocate_local_port() { return 0; }

Kernel/Net/TCPSocket.cpp

@@ -43,10 +43,9 @@ NonnullRefPtr<TCPSocket> TCPSocket::create(int protocol)
     return adopt(*new TCPSocket(protocol));
 }
 
-int TCPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags, sockaddr* addr, socklen_t* addr_length)
+int TCPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags)
 {
     (void)flags;
-    (void)addr_length;
     ASSERT(!packet_buffer.is_null());
     auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.pointer());
     auto& tcp_packet = *static_cast<const TCPPacket*>(ipv4_packet.payload());

Kernel/Net/TCPSocket.h

@@ -33,7 +33,7 @@ private:
 
     static NetworkOrdered<word> compute_tcp_checksum(const IPv4Address& source, const IPv4Address& destination, const TCPPacket&, word payload_size);
 
-    virtual int protocol_receive(const ByteBuffer&, void* buffer, size_t buffer_size, int flags, sockaddr* addr, socklen_t* addr_length) override;
+    virtual int protocol_receive(const ByteBuffer&, void* buffer, size_t buffer_size, int flags) override;
     virtual int protocol_send(const void*, int) override;
     virtual KResult protocol_connect(FileDescription&, ShouldBlock) override;
     virtual int protocol_allocate_local_port() override;

Kernel/Net/UDPSocket.cpp

@@ -43,10 +43,9 @@ NonnullRefPtr<UDPSocket> UDPSocket::create(int protocol)
     return adopt(*new UDPSocket(protocol));
 }
 
-int UDPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags, sockaddr* addr, socklen_t* addr_length)
+int UDPSocket::protocol_receive(const ByteBuffer& packet_buffer, void* buffer, size_t buffer_size, int flags)
 {
     (void)flags;
-    (void)addr_length;
     ASSERT(!packet_buffer.is_null());
     auto& ipv4_packet = *(const IPv4Packet*)(packet_buffer.pointer());
     auto& udp_packet = *static_cast<const UDPPacket*>(ipv4_packet.payload());

Kernel/Net/UDPSocket.h

@@ -16,7 +16,7 @@ private:
     virtual const char* class_name() const override { return "UDPSocket"; }
     static Lockable<HashMap<word, UDPSocket*>>& sockets_by_port();
 
-    virtual int protocol_receive(const ByteBuffer&, void* buffer, size_t buffer_size, int flags, sockaddr* addr, socklen_t* addr_length) override;
+    virtual int protocol_receive(const ByteBuffer&, void* buffer, size_t buffer_size, int flags) override;
     virtual int protocol_send(const void*, int) override;
     virtual KResult protocol_connect(FileDescription&, ShouldBlock) override { return KSuccess; }
     virtual int protocol_allocate_local_port() override;

Kernel/Process.cpp

@@ -2499,7 +2499,7 @@ int Process::sys$create_shared_buffer(pid_t peer_pid, int size, void** buffer)
     int shared_buffer_id = ++s_next_shared_buffer_id;
     auto shared_buffer = make<SharedBuffer>(m_pid, peer_pid, size);
     shared_buffer->m_shared_buffer_id = shared_buffer_id;
-    ASSERT(shared_buffer->size() >= size);
+    ASSERT((int)shared_buffer->size() >= size);
     shared_buffer->m_pid1_region = allocate_region_with_vmo(VirtualAddress(), shared_buffer->size(), shared_buffer->m_vmo.copy_ref(), 0, "SharedBuffer", PROT_READ | PROT_WRITE);
     shared_buffer->m_pid1_region->set_shared(true);
     *buffer = shared_buffer->m_pid1_region->vaddr().as_ptr();

Kernel/VM/PhysicalRegion.cpp

@@ -78,10 +78,11 @@ void PhysicalRegion::return_page_at(PhysicalAddress addr)
 
     int local_offset = addr.get() - m_lower.get();
     ASSERT(local_offset >= 0);
-    ASSERT(local_offset < m_pages * PAGE_SIZE);
+    ASSERT(local_offset < (int)(m_pages * PAGE_SIZE));
 
-    auto page = local_offset / PAGE_SIZE;
-    if (page < m_last) m_last = page;
+    auto page = (unsigned)local_offset / PAGE_SIZE;
+    if (page < m_last)
+        m_last = page;
 
     m_bitmap.set(page, false);
     m_used--;

Kernel/VM/VMObject.cpp

@@ -98,16 +98,16 @@ void VMObject::inode_size_changed(Badge<Inode>, size_t old_size, size_t new_size
 
     InterruptDisabler disabler;
 
-    size_t old_page_count = page_count();
+    auto old_page_count = page_count();
     m_size = new_size;
 
     if (page_count() > old_page_count) {
         // Add null pages and let the fault handler page these in when that day comes.
-        for (size_t i = old_page_count; i < page_count(); ++i)
+        for (auto i = old_page_count; i < page_count(); ++i)
             m_physical_pages.append(nullptr);
     } else {
         // Prune the no-longer valid pages. I'm not sure this is actually correct behavior.
-        for (size_t i = page_count(); i < old_page_count; ++i)
+        for (auto i = page_count(); i < old_page_count; ++i)
             m_physical_pages.take_last();
     }
 

Kernel/VM/VMObject.h

@@ -33,7 +33,7 @@ public:
     const String& name() const { return m_name; }
     void set_name(const String& name) { m_name = name; }
 
-    size_t page_count() const { return m_size / PAGE_SIZE; }
+    int page_count() const { return m_size / PAGE_SIZE; }
     const Vector<RefPtr<PhysicalPage>>& physical_pages() const { return m_physical_pages; }
     Vector<RefPtr<PhysicalPage>>& physical_pages() { return m_physical_pages; }