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 whole sourcetree for
code block which are undead. This means they can't be deselected and
are always in the kernel if the enviroment of the block is
selected. They have often the form of
#ifdef ABC
....
#ifdef ABC
fooooo
#endif
#endif
Here the ifdefs of the inner block can be removed without any harm. At
this point we just checked the source code (for the undead), but we
want to do a crosscheck with the Kconfig for undead code blocks in the
future.
I build the patches against a vanilla kernel (v2.6.36-rc3) in order to
try if the kernel compiles with this patches.
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/
Christian Dietrich (14):
arch/arm: Removing undead ifdef __ASSEMBLY__
arch/h8300: Removing dead ifdef __H8300_TLB_H__
arch/parisc: Removing undead ifdef CONFIG_PA20
arch/{s390,powerpc}: Removing undead ifdef __KERNEL__
arch/x86: Removing undead ifdef ACPI/X86_IO_ACPI
drivers/net: Removing undead ifdef CHELSIO_T1_1G
drivers/scsi: Removing undead ifdef __ISAPNP__
drivers/scsi: Removing undead ifdef CONFIG_PCI
drivers/scsi: Removing undead ifdef REAL_DMA
drivers/video: Removing undead ifdef ATAFB_FALCON
drivers/video: Removing undead ifdef CONFIG_FB_MATROX_G
include/linux: Removing undead ifdef __KERNEL__
kernel/: Removing undead ifdef CONFIG_SMP
kernel/: Removing undead ifdef CONFIG_DEBUG_LOCK_ALLOC
arch/arm/mach-ixp23xx/include/mach/platform.h | 3 ---
arch/h8300/include/asm/tlb.h | 13 -------------
arch/parisc/kernel/unaligned.c | 3 ---
arch/powerpc/include/asm/processor.h | 2 --
arch/powerpc/include/asm/vdso_datapage.h | 2 --
arch/s390/include/asm/processor.h | 4 ----
arch/x86/kernel/early-quirks.c | 2 --
drivers/net/chelsio/subr.c | 2 --
drivers/scsi/aha152x.c | 2 --
drivers/scsi/aic7xxx_old.c | 2 --
drivers/scsi/atari_NCR5380.c | 6 ------
drivers/video/atafb.c | 2 --
drivers/video/matrox/matroxfb_DAC1064.c | 5 +----
include/linux/socket.h | 6 +-----
kernel/sched.c | 4 +---
kernel/srcu.c | 2 --
16 files changed, 3 insertions(+), 57 deletions(-)
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