Am 23.09.2014 um 04:27 schrieb kbuild test robot:
> tree: git://linuxtv.org/media_tree.git devel-3.17-rc6
> head: 7f8de65b0dc84c19e79d7a642a5655524c57035c
> commit: f5ac7a471e156f997833f94bad2228e57122c227 [491/499] [media] em28xx:
> remove some unnecessary fields from struct em28xx_audio_mode
> config: i386-randconfig-r0-0923 (attached as .config)
> reproduce:
> git checkout f5ac7a471e156f997833f94bad2228e57122c227
> # save the attached .config to linux build tree
> make ARCH=i386
>
> Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
> http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings
>
> All warnings:
>
> In file included from drivers/media/usb/em28xx/em28xx-core.c:35:0:
> drivers/media/usb/em28xx/em28xx-core.c: In function 'em28xx_audio_setup':
>>> drivers/media/usb/em28xx/em28xx.h:787:2: warning: 'vid' may be used
>>> uninitialized in this function [-Wmaybe-uninitialized]
> printk(KERN_INFO "%s: "fmt,\
> ^
> drivers/media/usb/em28xx/em28xx-core.c:507:6: note: 'vid' was declared here
> u32 vid;
> ^
This is a false warning.
Applying https://patchwork.linuxtv.org/patch/25918/ makes it disappear.
Regards,
Frank
> vim +/vid +787 drivers/media/usb/em28xx/em28xx.h
>
> 47677e51 drivers/media/usb/em28xx/em28xx.h Mauro Carvalho Chehab 2014-03-05
> 771 void em28xx_free_device(struct kref *ref);
> c8793b03 drivers/media/video/em28xx/em28xx.h Mauro Carvalho Chehab 2008-01-13
> 772
> 855ff38e drivers/media/usb/em28xx/em28xx.h Frank Schaefer 2013-03-27
> 773 /* Provided by em28xx-camera.c */
> 855ff38e drivers/media/usb/em28xx/em28xx.h Frank Schaefer 2013-03-27
> 774 int em28xx_detect_sensor(struct em28xx *dev);
> 855ff38e drivers/media/usb/em28xx/em28xx.h Frank Schaefer 2013-03-27
> 775 int em28xx_init_camera(struct em28xx *dev);
> 855ff38e drivers/media/usb/em28xx/em28xx.h Frank Schaefer 2013-03-27
> 776
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 777 /* printk macros */
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 778
> 3acf2809 drivers/media/video/em28xx/em28xx.h Mauro Carvalho Chehab 2005-11-08
> 779 #define em28xx_err(fmt, arg...) do {\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 780 printk(KERN_ERR fmt , ##arg); } while (0)
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 781
> 3acf2809 drivers/media/video/em28xx/em28xx.h Mauro Carvalho Chehab 2005-11-08
> 782 #define em28xx_errdev(fmt, arg...) do {\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 783 printk(KERN_ERR "%s: "fmt,\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 784 dev->name , ##arg); } while (0)
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 785
> 3acf2809 drivers/media/video/em28xx/em28xx.h Mauro Carvalho Chehab 2005-11-08
> 786 #define em28xx_info(fmt, arg...) do {\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> @787 printk(KERN_INFO "%s: "fmt,\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 788 dev->name , ##arg); } while (0)
> 3acf2809 drivers/media/video/em28xx/em28xx.h Mauro Carvalho Chehab 2005-11-08
> 789 #define em28xx_warn(fmt, arg...) do {\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 790 printk(KERN_WARNING "%s: "fmt,\
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 791 dev->name , ##arg); } while (0)
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 792
> a6c2ba28 drivers/media/video/em28xx/em28xx.h Andrew Morton 2005-11-08
> 793 #endif
>
> :::::: The code at line 787 was first introduced by commit
> :::::: a6c2ba283565dbc9f055dcb2ecba1971460bb535 [PATCH] v4l: 716: support for
> em28xx board family
>
> :::::: TO: a...@osdl.org <a...@osdl.org>
> :::::: CC: Linus Torvalds <torva...@g5.osdl.org>
>
> ---
> 0-DAY kernel build testing backend Open Source Technology Center
> http://lists.01.org/mailman/listinfo/kbuild Intel Corporation
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