linux-kernel - [PATCH] include/linux/usb/usb_phy_gen_xceiv.h: check built-in or module for swithing usb_nop_xceiv

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Message-ID: <52679D19.903@asianux.com>
Date:	Wed, 23 Oct 2013 17:55:37 +0800
From:	Chen Gang <gang.chen@...anux.com>
To:	Tony Lindgren <tony@...mide.com>
CC:	Greg KH <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Will Deacon <will.deacon@....com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>
Subject: [PATCH] include/linux/usb/usb_phy_gen_xceiv.h: check built-in or
 module for swithing usb_nop_xceiv_register() implementation

When CONFIG_NOP_USB_XCEIV is as 'm', usb_nop_xceiv_register() will be
exported when the related module is loaded. So for built-in source
code, still need use the empty one.

Or it will can not pass compiling, the related error (for arm, with 
allmodconfig):

  arch/arm/mach-omap2/built-in.o: In function `omap3_evm_init':
  arch/arm/mach-omap2/board-omap3evm.c:703: undefined reference to `usb_nop_xceiv_register'


Signed-off-by: Chen Gang <gang.chen@...anux.com>
---
 include/linux/usb/usb_phy_gen_xceiv.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/linux/usb/usb_phy_gen_xceiv.h b/include/linux/usb/usb_phy_gen_xceiv.h
index f9a7e7b..8515958 100644
--- a/include/linux/usb/usb_phy_gen_xceiv.h
+++ b/include/linux/usb/usb_phy_gen_xceiv.h
@@ -12,7 +12,8 @@ struct usb_phy_gen_xceiv_platform_data {
 	unsigned int needs_reset:1;
 };
 
-#if IS_ENABLED(CONFIG_NOP_USB_XCEIV)
+#if IS_BUILTIN(CONFIG_NOP_USB_XCEIV) || \
+	(IS_MODULE(CONFIG_NOP_USB_XCEIV) && defined(MODULE))
 /* sometimes transceivers are accessed only through e.g. ULPI */
 extern void usb_nop_xceiv_register(void);
 extern void usb_nop_xceiv_unregister(void);
-- 
1.7.7.6
--
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