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From: Christian Dietrich on 2 Aug 2010 12:00
Hi all!

As part of the VAMOS[0] research project at the University of
Erlangen we are looking at multiple integrity errors in linux'
configuration system.

I've been running a check on the blackfin sourcetree for
config Items not defined in Kconfig and found many such cases. Sourcecode
blocks depending on these Items are not reachable from a vanilla
kernel -- dead code. I've seen such dead blocks made on purpose
e.g. while integrating new features into the kernel but generally
they're just useless.

Each of the patches in this patchset removes on such dead
config Item, I'd be glad if you consider applying them. I've been
doing deeper analysis of such issues before and can do so again but
I'm not so sure they were fastly usefull.

There were many more dead flags in the vanilla kernel cause the config
options were only introduced into the blackfin.uclinux.org kernel. I
hope i just got patches for real problem flags[1]. Perhaps some
syncing here would do something good for the blackfin arch.

I wasn't able to build the kernel for blackfin, so be aware that this
patches might break the compiling process, but i don't think so cause
they (hopefully) are just removing dead code.

Please keep me informed of this patch getting confirmed /
merged so we can keep track of it.

Regards

Christian Dietrich

[0] http://vamos1.informatik.uni-erlangen.de/
[1] Dead Flags in vanilla kernel but not in blackfin.uclinux.org
## Blackfin -- blackfin.uclinux.org
BFIN_SPI_ADC
NET_DSA_KSZ8893M
BFIN_TWI_LCD
FB_BF537_LQ035
FB_HITACHI_TX09
INPUT_ADXL34X_SPI
USB_NET2272
SPI_BFIN_SPORT
AD2S120X
AD2S90
INPUT_ADXL34X
INPUT_ADXL34X_I2C
INPUT_ADXL34X_SPI
USB_SL811_BFIN_USE_VBUS
JOYSTICK_AD7142
AD7152
SND_SOC_ADAU1361
FB_BFIN_7393
BACKLIGHT_ADP8870
SND_SOC_ADAU1371
AD7414
SND_SOC_ADAU1761
REGULATOR_AD5398
AD7150
AD7416

Christian Dietrich (6):
arch/blackfin: Remove config HIGHMEM
arch/blackfin: Remove dead CONFIG_BF535
arch/blackfin: Remove CONFIG_MEM_GENERIC_BOARD
arch/blackfin: Remove dead CONFIG_REGULATOR_ADP_SWITCH
arch/blackfin: Remove dead CONFIG_ADF702X
arch/blackfin: Removing dead SND_BLACKFIN_AD183X

arch/blackfin/Kconfig | 5 -
arch/blackfin/include/asm/mem_init.h | 18 ---
arch/blackfin/include/asm/traps.h | 2 +-
arch/blackfin/kernel/traps.c | 11 +--
arch/blackfin/mach-bf527/boards/cm_bf527.c | 18 ---
arch/blackfin/mach-bf527/boards/ezkit.c | 18 ---
arch/blackfin/mach-bf533/boards/H8606.c | 17 ---
arch/blackfin/mach-bf533/boards/cm_bf533.c | 17 ---
arch/blackfin/mach-bf533/boards/ezkit.c | 16 ---
arch/blackfin/mach-bf533/boards/stamp.c | 17 ---
arch/blackfin/mach-bf537/boards/cm_bf537e.c | 17 ---
arch/blackfin/mach-bf537/boards/cm_bf537u.c | 17 ---
arch/blackfin/mach-bf537/boards/pnav10.c | 18 ---
arch/blackfin/mach-bf537/boards/stamp.c | 162 ---------------------------
arch/blackfin/mach-bf537/boards/tcm_bf537.c | 17 ---
arch/blackfin/mach-bf548/boards/ezkit.c | 18 ---
arch/blackfin/mach-bf561/boards/cm_bf561.c | 16 ---
arch/blackfin/mach-bf561/boards/ezkit.c | 18 ---
arch/blackfin/mm/init.c | 3 -
19 files changed, 2 insertions(+), 423 deletions(-)

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Prev: perf: Use tracepoint_synchronize_unregister() to flush any pending tracepoint call
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