linux-kernel - [PATCH 5/7] dm-thin: use kvmalloc

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Date:	Tue, 7 Jul 2015 11:11:42 -0400 (EDT)
From:	Mikulas Patocka <mpatocka@...hat.com>
To:	Mike Snitzer <msnitzer@...hat.com>
cc:	"Alasdair G. Kergon" <agk@...hat.com>,
	Edward Thornber <thornber@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>,
	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, dm-devel@...hat.com
Subject: [PATCH 5/7] dm-thin: use kvmalloc

Make dm-thin use kvmalloc instead of kmalloc because there was a reported
allocation failure - see
https://bugzilla.redhat.com/show_bug.cgi?id=1225370

Signed-off-by: Mikulas Patocka <mpatocka@...hat.com>

---
 drivers/md/dm-thin.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Index: linux-4.2-rc1/drivers/md/dm-thin.c
===================================================================
--- linux-4.2-rc1.orig/drivers/md/dm-thin.c	2015-07-06 17:32:35.000000000 +0200
+++ linux-4.2-rc1/drivers/md/dm-thin.c	2015-07-06 17:36:28.000000000 +0200
@@ -2791,7 +2791,7 @@ static void __pool_destroy(struct pool *
 	mempool_destroy(pool->mapping_pool);
 	dm_deferred_set_destroy(pool->shared_read_ds);
 	dm_deferred_set_destroy(pool->all_io_ds);
-	kfree(pool);
+	kvfree(pool);
 }
 
 static struct kmem_cache *_new_mapping_cache;
@@ -2813,7 +2813,7 @@ static struct pool *pool_create(struct m
 		return (struct pool *)pmd;
 	}
 
-	pool = kmalloc(sizeof(*pool), GFP_KERNEL);
+	pool = kvmalloc(sizeof(*pool), GFP_KERNEL);
 	if (!pool) {
 		*error = "Error allocating memory for pool";
 		err_p = ERR_PTR(-ENOMEM);
@@ -2908,7 +2908,7 @@ bad_wq:
 bad_kcopyd_client:
 	dm_bio_prison_destroy(pool->prison);
 bad_prison:
-	kfree(pool);
+	kvfree(pool);
 bad_pool:
 	if (dm_pool_metadata_close(pmd))
 		DMWARN("%s: dm_pool_metadata_close() failed.", __func__);

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