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Heiko Carstens e858712185 s390/compat: fix mmap compat system calls 
The native 31 bit and the compat behaviour for the mmap system calls differ:

In native 31 bit mode the passed in address for the mmap system call will be
unmodified passed to sys_mmap_pgoff().
In compat mode however the passed in address will be modified with
compat_ptr() which masks out the most significant bit.

The result is that in native 31 bit mode each mmap request (with MAP_FIXED)
will fail where the most significat bit is set, while in compat mode it
may succeed.

This odd behaviour was introduced with d3815898 "[S390] mmap: add missing
compat_ptr conversion to both mmap compat syscalls".

To restore a consistent behaviour accross native and compat mode this
patch functionally reverts the above mentioned commit.

Cc: stable@vger.kernel.org
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2012-08-08 07:32:57 -07:00
..
appldata s390/vtimer: rework virtual timer interface 2012-07-20 11:15:08 +02:00
boot s390: add various .gitignore files. 2012-05-16 14:42:41 +02:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-07-26 13:00:59 -07:00
hypfs s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
include/asm s390/seccomp: add support for system call filtering using BPF 2012-08-08 07:32:56 -07:00
kernel s390/compat: fix mmap compat system calls 2012-08-08 07:32:57 -07:00
kvm KVM updates for the 3.6 merge window 2012-07-24 12:01:20 -07:00
lib s390/vtimer: rework virtual timer interface 2012-07-20 11:15:08 +02:00
math-emu s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
mm s390: make use of user_mode() macro where possible 2012-07-30 11:03:12 +02:00
oprofile s390: make use of user_mode() macro where possible 2012-07-30 11:03:12 +02:00
defconfig Merge branch 'akpm' (Andrew's patch-bomb) 2012-07-31 19:25:39 -07:00
Kbuild [S390] make arch/s390 subdirectories depend on config option 2011-12-27 11:27:12 +01:00
Kconfig s390/seccomp: add support for system call filtering using BPF 2012-08-08 07:32:56 -07:00
Kconfig.debug
Makefile s390: Use generic init_task 2012-05-05 13:00:25 +02:00