kernel/vm: Correct virtual function declarations.

The base VMCache class changed to the generic_ types with their
introduction in in *2011* (435c43f591),
but these classes were never properly adapted. These functions should not
be called here (they panic() -- but the base class only returns B_ERROR,
so that is a difference at least.)

Found by Clang's -Woverloaded-virtual.

headers/private/kernel/vm/VMCache.h

@@ -147,7 +147,7 @@ public:
 	virtual	bool				HasPage(off_t offset);
 
 	virtual	status_t			Read(off_t offset, const generic_io_vec *vecs,
-									size_t count,uint32 flags,
+									size_t count, uint32 flags,
 									generic_size_t *_numBytes);
 	virtual	status_t			Write(off_t offset, const generic_io_vec *vecs,
 									size_t count, uint32 flags,

src/system/kernel/vm/VMAnonymousNoSwapCache.cpp

@@ -100,8 +100,8 @@ VMAnonymousNoSwapCache::HasPage(off_t offset)
 
 
 status_t
-VMAnonymousNoSwapCache::Read(off_t offset, const iovec* vecs, size_t count,
+VMAnonymousNoSwapCache::Read(off_t offset, const generic_io_vec* vecs, size_t count,
-	uint32 flags, size_t* _numBytes)
+	uint32 flags, generic_size_t* _numBytes)
 {
 	panic("anonymous_store: read called. Invalid!\n");
 	return B_ERROR;
@@ -109,8 +109,8 @@ VMAnonymousNoSwapCache::Read(off_t offset, const iovec* vecs, size_t count,
 
 
 status_t
-VMAnonymousNoSwapCache::Write(off_t offset, const iovec* vecs, size_t count,
+VMAnonymousNoSwapCache::Write(off_t offset, const generic_io_vec* vecs, size_t count,
-	uint32 flags, size_t* _numBytes)
+	uint32 flags, generic_size_t* _numBytes)
 {
 	// no place to write, this will cause the page daemon to skip this store
 	return B_ERROR;

src/system/kernel/vm/VMAnonymousNoSwapCache.h

@@ -27,12 +27,12 @@ public:
 
 	virtual	int32				GuardSize()	{ return fGuardedSize; }
 
-	virtual	status_t			Read(off_t offset, const iovec* vecs,
+	virtual	status_t			Read(off_t offset, const generic_io_vec *vecs,
-									size_t count, uint32 flags,
+									 size_t count,uint32 flags,
-						 			size_t* _numBytes);
+									 generic_size_t *_numBytes);
-	virtual	status_t			Write(off_t offset, const iovec* vecs,
+	virtual	status_t			Write(off_t offset, const generic_io_vec *vecs,
-									size_t count, uint32 flags,
+									  size_t count, uint32 flags,
-						  			size_t* _numBytes);
+									  generic_size_t *_numBytes);
 
 	virtual	status_t			Fault(struct VMAddressSpace* aspace,
 									off_t offset);

src/system/kernel/vm/VMDeviceCache.cpp

@@ -21,8 +21,8 @@ VMDeviceCache::Init(addr_t baseAddress, uint32 allocationFlags)
 
 
 status_t
-VMDeviceCache::Read(off_t offset, const iovec* vecs, size_t count,
+VMDeviceCache::Read(off_t offset, const generic_io_vec *vecs, size_t count,
-	uint32 flags, size_t* _numBytes)
+	uint32 flags, generic_size_t *_numBytes)
 {
 	panic("device_store: read called. Invalid!\n");
 	return B_ERROR;
@@ -30,8 +30,8 @@ VMDeviceCache::Read(off_t offset, const iovec* vecs, size_t count,
 
 
 status_t
-VMDeviceCache::Write(off_t offset, const iovec* vecs, size_t count,
+VMDeviceCache::Write(off_t offset, const generic_io_vec* vecs, size_t count,
-	uint32 flags, size_t* _numBytes)
+	uint32 flags, generic_size_t* _numBytes)
 {
 	// no place to write, this will cause the page daemon to skip this store
 	return B_OK;

src/system/kernel/vm/VMDeviceCache.h

@@ -18,12 +18,12 @@ public:
 			status_t			Init(addr_t baseAddress,
 									uint32 allocationFlags);
 
-	virtual	status_t			Read(off_t offset, const iovec* vecs,
+	virtual	status_t			Read(off_t offset, const generic_io_vec *vecs,
-									size_t count, uint32 flags,
+									 size_t count, uint32 flags,
-						 			size_t* _numBytes);
+									 generic_size_t *_numBytes);
-	virtual	status_t			Write(off_t offset, const iovec* vecs,
+	virtual	status_t			Write(off_t offset, const generic_io_vec *vecs,
-									size_t count, uint32 flags,
+									  size_t count, uint32 flags,
-						  			size_t* _numBytes);
+									  generic_size_t *_numBytes);
 
 protected:
 	virtual	void				DeleteObject();