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From:   Tvrtko Ursulin <tursulin@ursulin.net>
To:     linux-kernel@vger.kernel.org
Cc:     tursulin@ursulin.net, tvrtko.ursulin@linux.intel.com,
        Tvrtko Ursulin <tvrtko.ursulin@intel.com>,
        Bart Van Assche <bart.vanassche@wdc.com>,
        Hannes Reinecke <hare@suse.com>,
        Johannes Thumshirn <jthumshirn@suse.de>,
        Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 3/6] lib/scatterlist: Skip requesting zeroed allocations in sgl_alloc_order
Date:   Wed, 26 Sep 2018 15:16:22 +0100
Message-Id: <20180926141625.17727-4-tvrtko.ursulin@linux.intel.com>
In-Reply-To: <20180926141625.17727-1-tvrtko.ursulin@linux.intel.com>
References: <20180926141625.17727-1-tvrtko.ursulin@linux.intel.com>
Sender: linux-kernel-owner@vger.kernel.org
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From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>

sg_init_table will clear the allocated block so requesting zeroed memory
from the allocator is redundant.

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Cc: Jens Axboe <axboe@kernel.dk>
---
 lib/scatterlist.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 23e53dce897d..3cc01cd82242 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -495,8 +495,7 @@ struct scatterlist *sgl_alloc_order(unsigned long length, unsigned int order,
 			return NULL;
 		nalloc++;
 	}
-	sgl = kmalloc_array(nalloc, sizeof(struct scatterlist),
-			    (gfp & ~GFP_DMA) | __GFP_ZERO);
+	sgl = kmalloc_array(nalloc, sizeof(struct scatterlist), gfp & ~GFP_DMA);
 	if (!sgl)
 		return NULL;
 
-- 
2.17.1