kernel: devfs: Add callback to request block size

Add bsize() callback within the bdevsw structure. This returns the
number of blocks a block device supports at maximum. This result is *not*
in bytes.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/sys/kern/kern_stub.c b/sys/kern/kern_stub.c
index 8603fd5..1a5fb0e 100644
--- a/sys/kern/kern_stub.c
+++ b/sys/kern/kern_stub.c
@@ -75,3 +75,9 @@ dev_nowrite(void)
 {
     return -ENOTSUP;
 }
+
+int
+dev_nobsize(void)
+{
+    return -ENOTSUP;
+}