1 files changed, 3 insertions, 6 deletions

diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
index 510222ce690f..635e394d8b83 100644
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -1133,12 +1133,9 @@ brelse(struct buf * bp)
 
 		/*
 		 * Get the base offset and length of the buffer.  Note that 
-		 * for block sizes that are less then PAGE_SIZE, the b_data
-		 * base of the buffer does not represent exactly b_offset and
-		 * neither b_offset nor b_size are necessarily page aligned.
-		 * Instead, the starting position of b_offset is:
-		 *
-		 * 	b_data + (b_offset & PAGE_MASK)
+		 * in the VMIO case if the buffer block size is not
+		 * page-aligned then b_data pointer may not be page-aligned.
+		 * But our b_pages[] array *IS* page aligned.
 		 *
 		 * block sizes less then DEV_BSIZE (usually 512) are not 
 		 * supported due to the page granularity bits (m->valid,