X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fblkdev_compat.h;h=a5294ceba3f0504219110ec7629f40811bc959b3;hb=9dcb97198338ba2d8764dd5604b278118612f74d;hp=bd1b2bf540031c0f1bdc9aad6da12ebd8b5344c2;hpb=30930fba219642cb1dadf1c8ef60ff799e3dc424;p=zfs.git

diff --git a/include/linux/blkdev_compat.h b/include/linux/blkdev_compat.h
index bd1b2bf..a5294ce 100644
--- a/include/linux/blkdev_compat.h
+++ b/include/linux/blkdev_compat.h
@@ -433,6 +433,21 @@ bio_set_flags_failfast(struct block_device *bdev, int *flags)
 #endif
 
 /*
+ * 2.6.33 API change
+ * Discard granularity and alignment restrictions may now be set.  For
+ * older kernels which do not support this it is safe to skip it.
+ */
+#ifdef HAVE_DISCARD_GRANULARITY
+static inline void
+blk_queue_discard_granularity(struct request_queue *q, unsigned int dg)
+{
+	q->limits.discard_granularity = dg;
+}
+#else
+#define blk_queue_discard_granularity(x, dg)	((void)0)
+#endif /* HAVE_DISCARD_GRANULARITY */
+
+/*
  * Default Linux IO Scheduler,
  * Setting the scheduler to noop will allow the Linux IO scheduler to
  * still perform front and back merging, while leaving the request