linux-kernel - [PATCH] usb: gadget: multi: Mark {cdc,rndis}_config_register() _

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Date:	Wed, 24 Apr 2013 13:16:35 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Felipe Balbi <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: [PATCH] usb: gadget: multi: Mark {cdc,rndis}_config_register() __init

If gcc (e.g. 4.1.2) decides not to inline cdc_config_register() and
rndis_config_register(), this will cause section mismatch warnings:

WARNING: drivers/usb/gadget/g_multi.o(.text+0x32f6): Section mismatch in reference from the function cdc_config_register() to the function .init.text:cdc_do_config()
The function cdc_config_register() references
the function __init cdc_do_config().
This is often because cdc_config_register lacks a __init
annotation or the annotation of cdc_do_config is wrong.

WARNING: drivers/usb/gadget/g_multi.o(.text+0x3326): Section mismatch in reference from the function rndis_config_register() to the function .init.text:rndis_do_config()
The function rndis_config_register() references
the function __init rndis_do_config().
This is often because rndis_config_register lacks a __init
annotation or the annotation of rndis_do_config is wrong.

Fortunately they're harmless, as {cdc,rndis}_config_register() are only
called from multi_bind(), which is annotated with __ref.

Mark {cdc,rndis}_config_register() with the __init annotation to kill the
warning.

Signed-off-by: Geert Uytterhoeven <geert@...ux-m68k.org>
---
Note: I did not verify that multi_bind() is rightfully marked __ref.

 drivers/usb/gadget/multi.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/multi.c b/drivers/usb/gadget/multi.c
index 20bbbf9..db63d9e 100644
--- a/drivers/usb/gadget/multi.c
+++ b/drivers/usb/gadget/multi.c
@@ -177,7 +177,7 @@ err_func_acm:
 	return ret;
 }

-static int rndis_config_register(struct usb_composite_dev *cdev)
+static __init int rndis_config_register(struct usb_composite_dev *cdev)
 {
 	static struct usb_configuration config = {
 		.bConfigurationValue	= MULTI_RNDIS_CONFIG_NUM,
@@ -192,7 +192,7 @@ static int rndis_config_register(struct usb_composite_dev *cdev)

 #else

-static int rndis_config_register(struct usb_composite_dev *cdev)
+static __init int rndis_config_register(struct usb_composite_dev *cdev)
 {
 	return 0;
 }
@@ -240,7 +240,7 @@ err_func_acm:
 	return ret;
 }

-static int cdc_config_register(struct usb_composite_dev *cdev)
+static __init int cdc_config_register(struct usb_composite_dev *cdev)
 {
 	static struct usb_configuration config = {
 		.bConfigurationValue	= MULTI_CDC_CONFIG_NUM,
@@ -255,7 +255,7 @@ static int cdc_config_register(struct usb_composite_dev *cdev)

 #else

-static int cdc_config_register(struct usb_composite_dev *cdev)
+static __init int cdc_config_register(struct usb_composite_dev *cdev)
 {
 	return 0;
 }
-- 
1.7.0.4

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