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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Damien Le Moal <damien.lemoal@wdc.com>,
        Mike Snitzer <snitzer@redhat.com>
Subject: [PATCH 4.18 124/135] dm linear: fix linear_end_io conditional definition
Date:   Tue, 16 Oct 2018 19:05:54 +0200
Message-Id: <20181016170523.832350976@linuxfoundation.org>
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4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Damien Le Moal <damien.lemoal@wdc.com>

commit 118aa47c7072bce05fc39bd40a1c0a90caed72ab upstream.

The dm-linear target is independent of the dm-zoned target. For code
requiring support for zoned block devices, use CONFIG_BLK_DEV_ZONED
instead of CONFIG_DM_ZONED.

While at it, similarly to dm linear, also enable the DM_TARGET_ZONED_HM
feature in dm-flakey only if CONFIG_BLK_DEV_ZONED is defined.

Fixes: beb9caac211c1 ("dm linear: eliminate linear_end_io call if CONFIG_DM_ZONED disabled")
Fixes: 0be12c1c7fce7 ("dm linear: add support for zoned block devices")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/dm-flakey.c |    2 ++
 drivers/md/dm-linear.c |    4 ++--
 2 files changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/md/dm-flakey.c
+++ b/drivers/md/dm-flakey.c
@@ -467,7 +467,9 @@ static int flakey_iterate_devices(struct
 static struct target_type flakey_target = {
 	.name   = "flakey",
 	.version = {1, 5, 0},
+#ifdef CONFIG_BLK_DEV_ZONED
 	.features = DM_TARGET_ZONED_HM,
+#endif
 	.module = THIS_MODULE,
 	.ctr    = flakey_ctr,
 	.dtr    = flakey_dtr,
--- a/drivers/md/dm-linear.c
+++ b/drivers/md/dm-linear.c
@@ -102,7 +102,7 @@ static int linear_map(struct dm_target *
 	return DM_MAPIO_REMAPPED;
 }
 
-#ifdef CONFIG_DM_ZONED
+#ifdef CONFIG_BLK_DEV_ZONED
 static int linear_end_io(struct dm_target *ti, struct bio *bio,
 			 blk_status_t *error)
 {
@@ -210,7 +210,7 @@ static size_t linear_dax_copy_to_iter(st
 static struct target_type linear_target = {
 	.name   = "linear",
 	.version = {1, 4, 0},
-#ifdef CONFIG_DM_ZONED
+#ifdef CONFIG_BLK_DEV_ZONED
 	.end_io = linear_end_io,
 	.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,
 #else