linux-kernel - [PATCH] iommu/vt-d: Fix compile warning from intel-svm.h

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Date:   Mon, 10 Feb 2020 10:36:56 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     iommu@...ts.linux-foundation.org
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <jroedel@...e.de>, CQ Tang <cq.tang@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] iommu/vt-d: Fix compile warning from intel-svm.h

From: Joerg Roedel <jroedel@...e.de>

The intel_svm_is_pasid_valid() needs to be marked inline, otherwise it
causes the compile warning below:

  CC [M]  drivers/dma/idxd/cdev.o
In file included from drivers/dma/idxd/cdev.c:9:0:
./include/linux/intel-svm.h:125:12: warning: ‘intel_svm_is_pasid_valid’ defined but not used [-Wunused-function]
 static int intel_svm_is_pasid_valid(struct device *dev, int pasid)
            ^~~~~~~~~~~~~~~~~~~~~~~~

Reported-by: Borislav Petkov <bp@...en8.de>
Fixes: 15060aba71711 ('iommu/vt-d: Helper function to query if a pasid has any active users')
Signed-off-by: Joerg Roedel <jroedel@...e.de>
---
 include/linux/intel-svm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/intel-svm.h b/include/linux/intel-svm.h
index 94f047a8a845..d7c403d0dd27 100644
--- a/include/linux/intel-svm.h
+++ b/include/linux/intel-svm.h
@@ -122,7 +122,7 @@ static inline int intel_svm_unbind_mm(struct device *dev, int pasid)
 	BUG();
 }
 
-static int intel_svm_is_pasid_valid(struct device *dev, int pasid)
+static inline int intel_svm_is_pasid_valid(struct device *dev, int pasid)
 {
 	return -EINVAL;
 }
-- 
2.16.4