From: Michael Jeanson <mjeanson@efficios.com>
Date: Thu, 18 Jun 2020 14:19:47 +0000 (-0400)
Subject: fix: backport of block_bio_complete for <= v2.6.38
X-Git-Tag: v2.11.5~16
X-Git-Url: https://git.lttng.org/?p=lttng-modules.git;a=commitdiff_plain;h=bb415fbf7981f2875a9083324c7dc8e921e07375

fix: backport of block_bio_complete for <= v2.6.38

The stable-2.11 branch still supports kernel before 3.0,
add the proper version checks to a patch that was backported
from master.

Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I9c5a66d9b68ba132bd9e752af6c069826961869a
---

diff --git a/instrumentation/events/lttng-module/block.h b/instrumentation/events/lttng-module/block.h
index d243b386..410c9b7d 100644
--- a/instrumentation/events/lttng-module/block.h
+++ b/instrumentation/events/lttng-module/block.h
@@ -681,15 +681,9 @@ LTTNG_TRACEPOINT_EVENT(block_bio_complete,
  */
 LTTNG_TRACEPOINT_EVENT(block_bio_complete,
 
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 	TP_PROTO(struct request_queue *q, struct bio *bio, int error),
 
 	TP_ARGS(q, bio, error),
-#else
-	TP_PROTO(struct request_queue *q, struct bio *bio),
-
-	TP_ARGS(q, bio),
-#endif
 
 	TP_FIELDS(
 		ctf_integer(dev_t, dev, bio_dev(bio))
@@ -727,7 +721,7 @@ LTTNG_TRACEPOINT_EVENT(block_bio_complete,
 			bio->bi_iter.bi_size)
 	)
 )
-#else
+#elif (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 /**
  * block_bio_complete - completed all work on the block operation
  * @q: queue holding the block operation
@@ -747,11 +741,32 @@ LTTNG_TRACEPOINT_EVENT(block_bio_complete,
 		ctf_integer(dev_t, dev, bio->bi_bdev->bd_dev)
 		ctf_integer(sector_t, sector, bio->bi_sector)
 		ctf_integer(unsigned int, nr_sector, bio->bi_size >> 9)
-#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,38))
 		ctf_integer(int, error, error)
+		blk_rwbs_ctf_integer(unsigned int, rwbs,
+			lttng_bio_op(bio), lttng_bio_rw(bio), bio->bi_size)
+	)
+)
 #else
+/**
+ * block_bio_complete - completed all work on the block operation
+ * @q: queue holding the block operation
+ * @bio: block operation completed
+ * @error: io error value
+ *
+ * This tracepoint indicates there is no further work to do on this
+ * block IO operation @bio.
+ */
+LTTNG_TRACEPOINT_EVENT(block_bio_complete,
+
+	TP_PROTO(struct request_queue *q, struct bio *bio),
+
+	TP_ARGS(q, bio),
+
+	TP_FIELDS(
+		ctf_integer(dev_t, dev, bio->bi_bdev->bd_dev)
+		ctf_integer(sector_t, sector, bio->bi_sector)
+		ctf_integer(unsigned int, nr_sector, bio->bi_size >> 9)
 		ctf_integer(int, error, 0)
-#endif
 		blk_rwbs_ctf_integer(unsigned int, rwbs,
 			lttng_bio_op(bio), lttng_bio_rw(bio), bio->bi_size)
 	)