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576ebd7492
linux/arch/s390
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Michael Holzheu 576ebd7492 kernel: Fix s390 absolute memory access for /dev/mem 
On s390 the prefix page and absolute zero pages are not correctly
returned when reading /dev/mem. The reason is that the s390 asm/io.h
file includes the asm-generic/io.h file which then defines
xlate_dev_mem_ptr() and therefore overwrites the s390 specific
version that does the correct swap operation for prefix and absolute
zero pages. The problem is a regression that was introduced with git
commit cd248341 (s390/pci: base support).

To fix the problem add "#ifndef xlate_dev_mem_ptr" in asm-generic/io.h
and "#define xlate_dev_mem_ptr" in asm/io.h. This ensures that the
s390 version is used. For completeness also add the "#ifndef"
construct for xlate_dev_kmem_ptr().

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-05-22 09:45:57 +02:00
..
appldata s390/time: rename tod clock access functions 2013-02-14 15:55:10 +01:00
boot
crypto
hypfs aio: don't include aio.h in sched.h 2013-05-07 20:16:25 -07:00
include kernel: Fix s390 absolute memory access for /dev/mem 2013-05-22 09:45:57 +02:00
kernel Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2013-05-21 09:36:46 -07:00
kvm Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2013-05-05 14:47:31 -07:00
lib s390/uaccess: add "fallthrough" comments 2013-05-02 15:50:19 +02:00
math-emu
mm s390: fix gmap_ipte_notifier vs. software dirty pages 2013-05-15 13:09:07 +02:00
net s390/bpf,jit: use kcalloc instead of kmalloc and memset 2013-04-17 14:07:27 +02:00
oprofile oprofile, s390: Add support for IBM zEnterprise EC12 2013-04-06 15:25:42 +02:00
pci s390/pci: use pci_scan_root_bus 2013-04-26 09:07:19 +02:00
defconfig
Kbuild
Kconfig s390: remove non existent reference to GENERIC_KERNEL_THREAD 2013-05-07 14:11:54 +02:00
Kconfig.debug Kconfig: consolidate CONFIG_DEBUG_STRICT_USER_COPY_CHECKS 2013-04-30 17:04:09 -07:00
Makefile s390: remove small stack config option 2013-04-26 09:07:08 +02:00