From: Arnd Bergmann <arnd@arndb.de>
To: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: linux-kbuild@vger.kernel.org, Michal Marek <mmarek@suse.cz>,
        linux-kernel@vger.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
        Sam Ravnborg <sam@ravnborg.org>, Arnaud Lacombe <lacombar@gmail.com>,
        Greg KH <greg@kroah.com>
Subject: Re: [PATCH 6/8] kconfig: fix randomising choice entries in presence of KCONFIG_ALLCONFIG
Date: Fri, 26 Apr 2013 14:05:37 +0200
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On Thursday 25 April 2013 00:29:53 Yann E. MORIN wrote:
> From: "Yann E. MORIN" <yann.morin.1998@free.fr>
> 
> Currently, randconfig does randomise choice entries, unless KCONFIG_ALLCONFIG
> is specified.
> 
> For example, given those two files (Thomas' test-case):

This patch has made it into linux-next today, and while I agree with
the basic idea, it seems to cause regressions for me.

For these ARM defconfigs, 'make' always asks about USB_GADGET now
after doing any of these defconfigs:

am200epdkit_defconfig
at91_dt_defconfig
at91rm9200_defconfig
at91sam9260_defconfig
at91sam9261_defconfig
at91sam9263_defconfig
at91sam9g20_defconfig
at91sam9g45_defconfig
corgi_defconfig
ezx_defconfig
h5000_defconfig
imote2_defconfig
kzm9g_defconfig
lpc32xx_defconfig
lubbock_defconfig
mackerel_defconfig
magician_defconfig
mini2440_defconfig
msm_defconfig
omap1_defconfig
prima2_defconfig
sama5_defconfig
tct_hammer_defconfig

~/arm-soc$ make at91_dt_defconfig
make[1]: Entering directory `/git/arm-soc'
  GEN     /git/arm-soc/obj-tmp/Makefile
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#
make[1]: Leaving directory `/git/arm-soc'
~/arm-soc$ make -sj40
make[1]: Entering directory `/git/arm-soc'
  GEN     /git/arm-soc/obj-tmp/Makefile
scripts/kconfig/conf --silentoldconfig Kconfig
*
* Restart config...
*
*
* USB Gadget Support
*
USB Gadget Support (USB_GADGET) [Y/n/m/?] y
  Debugging messages (DEVELOPMENT) (USB_GADGET_DEBUG) [N/y/?] n
  Debugging information files (DEVELOPMENT) (USB_GADGET_DEBUG_FILES) [N/y/?] n
  Debugging information files in debugfs (DEVELOPMENT) (USB_GADGET_DEBUG_FS) [N/y/?] n
  Maximum VBUS Power usage (2-500 mA) (USB_GADGET_VBUS_DRAW) [2] 2
  Number of storage pipeline buffers (USB_GADGET_STORAGE_NUM_BUFFERS) [2] 2
  USB Gadget Drivers [M/y/?] (NEW) 

I'm taking Greg on Cc here so he's aware of the problem and knows it's
not caused by any of the USB Kconfig changes that I and others submitted
recently. It took me a while to confirm that it's just your patch and
not mine that caused the problem.

	Arnd
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