Linux 4.2 compat: remove bio->bi_cnt access

Linux 4.2 commit torvalds/linux@dac5621 renamed bio->bi_cnt to
bio->__bi_cnt.  Because this value is only used once in a block of
debug code it simplest just to remove the PANIC.  To my knowledge
this debugging has never been hit or proved useful so this is no
great loss.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <ryao@gentoo.org>
Closes #3596

diff --git a/module/zfs/vdev_disk.c b/module/zfs/vdev_disk.c
index 9cfc080e66beb2389d02036db08f8825c6f24816..eb77c269c2480680c2762f72008f90f99790624c 100644 (file)
--- a/module/zfs/vdev_disk.c
+++ b/module/zfs/vdev_disk.c
@@ -426,15 +426,6 @@ BIO_END_IO_PROTO(vdev_disk_physio_completion, bio, size, error)
        dio_request_t *dr = bio->bi_private;
        int rc;
 
-       /* Fatal error but print some useful debugging before asserting */
-       if (dr == NULL)
-               PANIC("dr == NULL, bio->bi_private == NULL\n"
-                   "bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d\n"
-                   "bi_idx: %d, bi_size: %d, bi_end_io: %p, bi_cnt: %d\n",
-                   bio->bi_next, bio->bi_flags, bio->bi_rw, bio->bi_vcnt,
-                   BIO_BI_IDX(bio), BIO_BI_SIZE(bio), bio->bi_end_io,
-                   atomic_read(&bio->bi_cnt));
-
 #ifndef HAVE_2ARGS_BIO_END_IO_T
        if (BIO_BI_SIZE(bio))
                return (1);