linux-kernel - [tip:x86/platform] x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG

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Date:	Fri, 19 Sep 2014 04:48:53 -0700
From:	tip-bot for Martin Kelly <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	martin@...tingkelly.com, tglx@...utronix.de,
	aubrey.li@...ux.intel.com, martkell@...zon.com
Subject: [tip:x86/platform] x86/platform/pmc_atom:
  Fix warning when CONFIG_DEBUG_FS=n

Commit-ID:  9575a6a23a8081bc4c9d47d001621e2af0957c02
Gitweb:     http://git.kernel.org/tip/9575a6a23a8081bc4c9d47d001621e2af0957c02
Author:     Martin Kelly <martin@...tingkelly.com>
AuthorDate: Wed, 17 Sep 2014 07:17:56 -0700
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Fri, 19 Sep 2014 13:02:21 +0200

x86/platform/pmc_atom: Fix warning when CONFIG_DEBUG_FS=n

When compiling with CONFIG_DEBUG_FS=n, GCC emits an unused
variable warning for pmc_atom.c because "ret" is used only
within the CONFIG_DEBUG_FS block.

This patch adds a dummy #ifdef for pmc_dbgfs_register() when
CONFIG_DEBUG_FS=n to simplify the code and remove the warning.

Signed-off-by: Martin Kelly <martkell@...zon.com>
Acked-by: "Li, Aubrey" <aubrey.li@...ux.intel.com>
Cc: vishwesh.m.rudramuni@...el.com
Link: http://lkml.kernel.org/r/1410963476-8360-1-git-send-email-martin@martingkelly.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/kernel/pmc_atom.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index 0c424a6..0ee5025e 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -235,6 +235,11 @@ err:
 	pmc_dbgfs_unregister(pmc);
 	return -ENODEV;
 }
+#else
+static int pmc_dbgfs_register(struct pmc_dev *pmc, struct pci_dev *pdev)
+{
+	return 0;
+}
 #endif /* CONFIG_DEBUG_FS */
 
 static int pmc_setup_dev(struct pci_dev *pdev)
@@ -262,14 +267,12 @@ static int pmc_setup_dev(struct pci_dev *pdev)
 	/* PMC hardware registers setup */
 	pmc_hw_reg_setup(pmc);
 
-#ifdef CONFIG_DEBUG_FS
 	ret = pmc_dbgfs_register(pmc, pdev);
 	if (ret) {
 		iounmap(pmc->regmap);
-		return ret;
 	}
-#endif /* CONFIG_DEBUG_FS */
-	return 0;
+
+	return ret;
 }
 
 /*
--
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