linux-kernel - [PATCH] block: cfq_cpd

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Date:   Thu, 10 Nov 2016 11:16:37 -0500
From:   Tejun Heo <tj@...nel.org>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org,
        Dan Carpenter <dan.carpenter@...cle.com>,
        linux-kernel@...r.kernel.org, kernel-team@...com
Subject: [PATCH] block: cfq_cpd_alloc() should use @gfp

Re: [bug report] blkcg: replace blkcg_policy->cpd_size with
 ->cpd_alloc/free_fn() methods
Reply-To: 
In-Reply-To: <20161110133426.GA30610@...nda>

cfq_cpd_alloc() which is the cpd_alloc_fn implementation for cfq was
incorrectly hard coding GFP_KERNEL instead of using the mask specified
through the @gfp parameter.  This currently doesn't cause any actual
issues because all current callers specify GFP_KERNEL.  Fix it.

Signed-off-by: Tejun Heo <tj@...nel.org>
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Fixes: e4a9bde9589f ("blkcg: replace blkcg_policy->cpd_size with ->cpd_alloc/free_fn() methods")
---
 block/cfq-iosched.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 5e24d88..3ab6807 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1596,7 +1596,7 @@ static struct blkcg_policy_data *cfq_cpd_alloc(gfp_t gfp)
 {
 	struct cfq_group_data *cgd;
 
-	cgd = kzalloc(sizeof(*cgd), GFP_KERNEL);
+	cgd = kzalloc(sizeof(*cgd), gfp);
 	if (!cgd)
 		return NULL;
 	return &cgd->cpd;