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-rw-r--r--include/linux/pktcdvd.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/pktcdvd.h b/include/linux/pktcdvd.h
index 4b32bce9a28..2c177e4c8f2 100644
--- 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)