kernel: disk: Add comment of V_BSIZE requirements

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/sys/kern/kern_disk.c b/sys/kern/kern_disk.c
index af2aa13..5c09c81 100644
--- a/sys/kern/kern_disk.c
+++ b/sys/kern/kern_disk.c
@@ -274,6 +274,11 @@ disk_add(const char *name, dev_t dev, const struct bdevsw *bdev, int flags)
     dp->id = disk_count++;
     dp->bsize = DEFAULT_BSIZE;
 
+    /*
+     * We are to panic if the virtual blocksize
+     * defined is not a multiple of any hardware
+     * block size
+     */
     if ((V_BSIZE & (dp->bsize - 1)) != 0) {
         panic("virtual block size not hw bsize aligned\n");
     }