Kernel: Use a FlatPtr for the "argument" to ioctl()

Since it's often used to pass pointers, it should really be a FlatPtr.

Kernel/Devices/BXVGADevice.cpp

@@ -192,7 +192,7 @@ KResultOr<Region*> BXVGADevice::mmap(Process& process, FileDescription&, Virtual
     return region;
 }
 
-int BXVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
+int BXVGADevice::ioctl(FileDescription&, unsigned request, FlatPtr arg)
 {
     REQUIRE_PROMISE(video);
     switch (request) {

Kernel/Devices/BXVGADevice.h

@@ -40,7 +40,7 @@ public:
 
     BXVGADevice();
 
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
     virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t, int prot, bool shared) override;
 
 private:

Kernel/Devices/MBVGADevice.cpp

@@ -73,7 +73,7 @@ KResultOr<Region*> MBVGADevice::mmap(Process& process, FileDescription&, Virtual
     return region;
 }
 
-int MBVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
+int MBVGADevice::ioctl(FileDescription&, unsigned request, FlatPtr arg)
 {
     REQUIRE_PROMISE(video);
     switch (request) {

Kernel/Devices/MBVGADevice.h

@@ -40,7 +40,7 @@ public:
 
     MBVGADevice(PhysicalAddress addr, size_t pitch, size_t width, size_t height);
 
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
     virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t, int prot, bool shared) override;
 
 private:

Kernel/FileSystem/File.cpp

@@ -50,7 +50,7 @@ void File::close()
 {
 }
 
-int File::ioctl(FileDescription&, unsigned, unsigned)
+int File::ioctl(FileDescription&, unsigned, FlatPtr)
 {
     return -ENOTTY;
 }

Kernel/FileSystem/File.h

@@ -76,7 +76,7 @@ public:
 
     virtual ssize_t read(FileDescription&, size_t, u8*, ssize_t) = 0;
     virtual ssize_t write(FileDescription&, size_t, const u8*, ssize_t) = 0;
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg);
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg);
     virtual KResultOr<Region*> mmap(Process&, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t size, int prot, bool shared);
 
     virtual String absolute_path(const FileDescription&) const = 0;

Kernel/Net/IPv4Socket.cpp

@@ -462,7 +462,7 @@ KResult IPv4Socket::getsockopt(FileDescription& description, int level, int opti
     }
 }
 
-int IPv4Socket::ioctl(FileDescription&, unsigned request, unsigned arg)
+int IPv4Socket::ioctl(FileDescription&, unsigned request, FlatPtr arg)
 {
     REQUIRE_PROMISE(inet);
 

Kernel/Net/IPv4Socket.h

@@ -63,7 +63,7 @@ public:
     virtual KResult setsockopt(int level, int option, const void*, socklen_t) override;
     virtual KResult getsockopt(FileDescription&, int level, int option, void*, socklen_t*) override;
 
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
 
     bool did_receive(const IPv4Address& peer_address, u16 peer_port, KBuffer&&);
 

Kernel/Process.cpp

@@ -2636,7 +2636,7 @@ int Process::sys$setpgid(pid_t specified_pid, pid_t specified_pgid)
     return 0;
 }
 
-int Process::sys$ioctl(int fd, unsigned request, unsigned arg)
+int Process::sys$ioctl(int fd, unsigned request, FlatPtr arg)
 {
     auto description = file_description(fd);
     if (!description)

Kernel/Process.h

@@ -243,7 +243,7 @@ public:
     unsigned sys$alarm(unsigned seconds);
     int sys$access(const char* pathname, size_t path_length, int mode);
     int sys$fcntl(int fd, int cmd, u32 extra_arg);
-    int sys$ioctl(int fd, unsigned request, unsigned arg);
+    int sys$ioctl(int fd, unsigned request, FlatPtr arg);
     int sys$mkdir(const char* pathname, size_t path_length, mode_t mode);
     clock_t sys$times(tms*);
     int sys$utime(const char* pathname, size_t path_length, const struct utimbuf*);

Kernel/TTY/MasterPTY.cpp

@@ -124,7 +124,7 @@ void MasterPTY::close()
     }
 }
 
-int MasterPTY::ioctl(FileDescription& description, unsigned request, unsigned arg)
+int MasterPTY::ioctl(FileDescription& description, unsigned request, FlatPtr arg)
 {
     REQUIRE_PROMISE(tty);
     if (!m_slave)

Kernel/TTY/MasterPTY.h

@@ -56,7 +56,7 @@ private:
     virtual bool can_write(const FileDescription&, size_t) const override;
     virtual void close() override;
     virtual bool is_master_pty() const override { return true; }
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override;
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override;
     virtual const char* class_name() const override { return "MasterPTY"; }
 
     RefPtr<SlavePTY> m_slave;

Kernel/TTY/TTY.cpp

@@ -279,7 +279,7 @@ void TTY::set_termios(const termios& t)
 #endif
 }
 
-int TTY::ioctl(FileDescription&, unsigned request, unsigned arg)
+int TTY::ioctl(FileDescription&, unsigned request, FlatPtr arg)
 {
     REQUIRE_PROMISE(tty);
     auto& process = *Process::current;

Kernel/TTY/TTY.h

@@ -43,7 +43,7 @@ public:
     virtual ssize_t write(FileDescription&, size_t, const u8*, ssize_t) override;
     virtual bool can_read(const FileDescription&, size_t) const override;
     virtual bool can_write(const FileDescription&, size_t) const override;
-    virtual int ioctl(FileDescription&, unsigned request, unsigned arg) override final;
+    virtual int ioctl(FileDescription&, unsigned request, FlatPtr arg) override final;
     virtual String absolute_path(const FileDescription&) const override { return tty_name(); }
 
     virtual StringView tty_name() const = 0;