[PATCH] usb: Patch for USBDEVFS_IOCTL from 32-bit programs

[safe/jmp/linux-2.6] / include / linux / pktcdvd.h

diff --git a/include/linux/pktcdvd.h b/include/linux/pktcdvd.h
index 4b32bce..2c177e4 100644 (file)
--- a/include/linux/pktcdvd.h
+++ b/include/linux/pktcdvd.h
@@ -166,6 +166,9 @@ struct packet_iosched
 /*
  * 32 buffers of 2048 bytes
  */
+#if (PAGE_SIZE % CD_FRAMESIZE) != 0
+#error "PAGE_SIZE must be a multiple of CD_FRAMESIZE"
+#endif
 #define PACKET_MAX_SIZE                32
 #define PAGES_PER_PACKET       (PACKET_MAX_SIZE * CD_FRAMESIZE / PAGE_SIZE)
 #define PACKET_MAX_SECTORS     (PACKET_MAX_SIZE * CD_FRAMESIZE >> 9)