linux-kernel - linux-next: build failure after merge of the cxl tree

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Date:   Mon, 6 Sep 2021 14:20:37 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the cxl tree

Hi all,

After merging the cxl tree, today's linux-next build (powerpc
ppc64_defconfig) failed like this:

drivers/nvdimm/label.c:750:32: error: 'uuid_to_nvdimm_cclass' defined but not used [-Werror=unused-function]
  750 | static enum nvdimm_claim_class uuid_to_nvdimm_cclass(uuid_t *uuid)
      |                                ^~~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors

Caused by commit

  d68bc4b2338b ("libnvdimm/labels: Add address-abstraction uuid definitions")

Exposed by commit

  3fe617ccafd6 ("Enable '-Werror' by default for all kernel builds")

I have applied the following patch for today.

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Mon, 6 Sep 2021 14:14:52 +1000
Subject: [PATCH] cxl: mark unused function as such

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 drivers/nvdimm/label.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvdimm/label.c b/drivers/nvdimm/label.c
index 7abeb1233404..175db14c7694 100644
--- a/drivers/nvdimm/label.c
+++ b/drivers/nvdimm/label.c
@@ -747,6 +747,7 @@ static enum nvdimm_claim_class guid_to_nvdimm_cclass(guid_t *guid)
 }
 
 /* CXL labels store UUIDs instead of GUIDs for the same data */
+__maybe_unused
 static enum nvdimm_claim_class uuid_to_nvdimm_cclass(uuid_t *uuid)
 {
 	if (uuid_equal(uuid, &nvdimm_btt_uuid))
-- 
2.32.0

-- 
Cheers,
Stephen Rothwell

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