linux.git/arch/s390/kernel/compat_linux.h, branch v3.15

s390/compat: get rid of compat wrapper assembly code

2014-03-06T15:30:48+00:00

Now that all compat syscalls have been converted to use the
COMPAT_SYSCALL_DEFINE macros, we don't need to compat syscall
wrapper assembly code anymore.
So remove it and fix up the system call table accordingly.

Signed-off-by: Heiko Carstens

s390/compat: add sync_file_range and fallocate compat syscalls

2014-03-04T08:05:47+00:00

The compat syscall wrappers for sync_file_range and fallocate merged 32 bit
parameters into 64 bit parameters. Therefore they did more than just the
usual zero and/or sign extension of system call parameters.

So convert these two wrappers to full s390 specific compat sytem calls.

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 7

2014-03-04T08:05:38+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 6

2014-03-04T08:05:37+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 5

2014-03-04T08:05:36+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 4

2014-03-04T08:05:36+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 3

2014-03-04T08:05:35+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 2

2014-03-04T08:05:35+00:00

Signed-off-by: Heiko Carstens

s390/compat: convert to COMPAT_SYSCALL_DEFINEx part 1

2014-03-04T08:05:34+00:00

Convert s390 specific system calls to to the new COMPAT_SYSCALL_DEFINE macro.
This allows us to get rid of the assembly compat wrappers.

Signed-off-by: Heiko Carstens

s390: fix save and restore of the floating-point-control register

2013-10-24T15:17:11+00:00

The FPC_VALID_MASK has been used to check the validity of the value
to be loaded into the floating-point-control register. With the
introduction of the floating-point extension facility and the
decimal-floating-point additional bits have been defined which need
to be checked in a non straight forward way. So far these bits have
been ignored which can cause an incorrect results for decimal-
floating-point operations, e.g. an incorrect rounding mode to be
set after signal return.

The static check with the FPC_VALID_MASK is replaced with a trial
load of the floating-point-control value, see test_fp_ctl.

In addition an information leak with the padding word between the
floating-point-control word and the floating-point registers in
the s390_fp_regs is fixed.

Reported-by: Heiko Carstens 
Reviewed-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky