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

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Message-Id: <1410841463-24826-1-git-send-email-martin@martingkelly.com>
Date:	Mon, 15 Sep 2014 21:24:23 -0700
From:	Martin Kelly <martin@...tingkelly.com>
To:	x86@...nel.org
Cc:	vishwesh.m.rudramuni@...el.com, joe@...ches.com,
	hpa@...ux.intel.com, aubrey.li@...ux.intel.com,
	linux-kernel@...r.kernel.org,
	Martin Kelly <martin@...tingkelly.com>,
	Martin Kelly <martkell@...zon.com>
Subject: [PATCH] x86/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 fixes it up to eliminate "ret" when
CONFIG_DEBUG_FS=n.

Signed-off-by: Martin Kelly <martkell@...zon.com>
---
 arch/x86/kernel/pmc_atom.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/pmc_atom.c b/arch/x86/kernel/pmc_atom.c
index 0c424a6..66e7d88 100644
--- a/arch/x86/kernel/pmc_atom.c
+++ b/arch/x86/kernel/pmc_atom.c
@@ -240,7 +240,9 @@ err:
 static int pmc_setup_dev(struct pci_dev *pdev)
 {
 	struct pmc_dev *pmc = &pmc_device;
+#ifdef CONFIG_DEBUG_FS
 	int ret;
+#endif /* CONFIG_DEBUG_FS */
 
 	/* Obtain ACPI base address */
 	pci_read_config_dword(pdev, ACPI_BASE_ADDR_OFFSET, &acpi_base_addr);
-- 
2.1.0

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