X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fblkdev_compat.h;h=ec9926ffd9fe1be50e47178958cadf6845c08e9b;hb=6822a0d0582f580a21f70615f29ffe2869be8265;hp=1ff8eeaf329e8b733d19107af197f307016bdbde;hpb=395350c85d9903beba43bac7ae79092ae25f1526;p=zfs.git

diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h
index 1ff8eea..ec9926f 100644
--- a/include/linux/blkdev_compat.h
+++ b/include/linux/blkdev_compat.h
@@ -393,6 +393,15 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
 #endif /* HAVE_1ARG_INVALIDATE_BDEV */
 
 /*
+ * 2.6.27 API change
+ * The function was exported for use, prior to this it existed by the
+ * symbol was not exported.
+ */
+#ifndef HAVE_LOOKUP_BDEV
+# define lookup_bdev(path)		ERR_PTR(-ENOTSUP)
+#endif
+
+/*
  * 2.6.30 API change
  * To ensure good performance preferentially use the physical block size
  * for proper alignment.  The physical size is supposed to be the internal
@@ -469,4 +478,13 @@ blk_queue_discard_granularity(struct request_queue *q, unsigned int dg)
  */
 #define	VDEV_SCHEDULER			"noop"
 
+/*
+ * A common holder for vdev_bdev_open() is used to relax the exclusive open
+ * semantics slightly.  Internal vdev disk callers may pass VDEV_HOLDER to
+ * allow them to open the device multiple times.  Other kernel callers and
+ * user space processes which don't pass this value will get EBUSY.  This is
+ * currently required for the correct operation of hot spares.
+ */
+#define VDEV_HOLDER			((void *)0x2401de7)
+
 #endif /* _ZFS_BLKDEV_H */