linux-kernel - Re: linux-next: Tree for May 17 (drivers/nvme/host/fc.o)

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Date:   Wed, 18 May 2022 06:57:04 +0200
From:   Christoph Hellwig <hch@....de>
To:     Randy Dunlap <rdunlap@...radead.org>
Cc:     Stephen Rothwell <sfr@...b.auug.org.au>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        James Smart <james.smart@...adcom.com>,
        linux-nvme@...ts.infradead.org, Christoph Hellwig <hch@....de>
Subject: Re: linux-next: Tree for May 17 (drivers/nvme/host/fc.o)

The patch that adds nvme_fc_io_getuuid need something like this
folded in:

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index a11c69e681180..3c778bb0c2944 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -1911,7 +1911,9 @@ char *nvme_fc_io_getuuid(struct nvmefc_fcp_req *req)
 	struct nvme_fc_fcp_op *op = fcp_req_to_fcp_op(req);
 	struct request *rq = op->rq;
 
-	return rq->bio ? blkcg_get_fc_appid(rq->bio) : NULL;
+	if (!IS_ENABLED(CONFIG_BLK_CGROUP_FC_APPID) || !rq->bio)
+		return NULL;
+	return blkcg_get_fc_appid(rq->bio);
 }
 EXPORT_SYMBOL_GPL(nvme_fc_io_getuuid);