linux-kernel - [PATCH] drivers, pch_dma: Fix warning when CONFIG

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Date:	Sun, 6 Mar 2011 17:26:10 +0600
From:	Rakib Mullick <rakib.mullick@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Dan Williams <dan.j.williams@...el.com>,
	Vinod Koul <vinod.koul@...el.com>
Subject: [PATCH] drivers, pch_dma: Fix warning when CONFIG_PM=n.

When CONFIG_PM=n, we get the following warning:

drivers/dma/pch_dma.c:741: warning: ‘pch_dma_suspend’ defined but not used
drivers/dma/pch_dma.c:755: warning: ‘pch_dma_resume’ defined but not used

To fix it, wrap pch_dma_{suspend,resume} and
pch_dma_{save,restore}_regs functions with CONFIG_PM.

Signed-off-by: Rakib Mullick <rakib.mullick@...il.com>
---

diff --git a/drivers/dma/pch_dma.c b/drivers/dma/pch_dma.c
index 1c38418..33073cc 100644
--- a/drivers/dma/pch_dma.c
+++ b/drivers/dma/pch_dma.c
@@ -694,6 +694,7 @@ static irqreturn_t pd_irq(int irq, void *devid)
 	return ret;
 }

+#ifdef	CONFIG_PM
 static void pch_dma_save_regs(struct pch_dma *pd)
 {
 	struct pch_dma_chan *pd_chan;
@@ -771,6 +772,7 @@ static int pch_dma_resume(struct pci_dev *pdev)

 	return 0;
 }
+#endif

 static int __devinit pch_dma_probe(struct pci_dev *pdev,
 				   const struct pci_device_id *id)
--
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