linux-toradex.git/arch/s390/lib/Makefile, branch v3.2.37

[S390] uaccess: make sure copy_from_user_overflow is builtin

2010-03-08T11:25:29+00:00

If there is no in kernel image caller modules will suffer:

ERROR: "copy_from_user_overflow" [net/core/pktgen.ko] undefined!
ERROR: "copy_from_user_overflow" [net/can/can-raw.ko] undefined!
ERROR: "copy_from_user_overflow" [fs/cifs/cifs.ko] undefined!

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

[S390] uaccess: implement strict user copy checks

2010-02-26T21:37:29+00:00

Same as on x86 and sparc, besides the fact that enabling the option
will just emit compile time warnings instead of errors.
Keeps allyesconfig kernels compiling.

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

[S390] add __ucmpdi2() helper function

2009-07-07T14:37:53+00:00

Provide __ucmpdi2() helper function on 31 bit so we don't run
again and again in compile errors like this one:

kernel/built-in.o: In function `T.689':
perf_counter.c:(.text+0x56c86): undefined reference to `__ucmpdi2'

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

[S390] remove -traditional

2008-04-30T11:38:44+00:00

Signed-off-by: Mathieu Desnoyers 
CC: Sam Ravnborg 
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

[S390] Bogomips calculation for 64 bit.

2007-07-10T09:24:47+00:00

The bogomips calculation triggered via reading from /proc/cpuinfo
can return incorrect values if the qrnnd assembly is called with a
pointer in %r2 with any of the upper 32 bits set.
Fix this by using 64 bit division / remainder operation provided by
gcc instead of calling the assembly.

Signed-off-by: Martin Schwidefsky

[S390]: Fix build on 31-bit.

2007-04-26T05:28:53+00:00

Allow s390 to properly override the generic
__div64_32() implementation by:

1) Using obj-y for div64.o in s390's makefile instead
   of lib-y

2) Adding the weak attribute to the generic implementation.

Signed-off-by: David S. Miller

[S390] Calibrate delay and bogomips.

2007-02-05T20:18:31+00:00

Preset the bogomips number to the cpu capacity value reported by
store system information in SYSIB 1.2.2. This value is constant
for a particular machine model and can be used to determine
relative performance differences between machines.

Signed-off-by: Martin Schwidefsky

[S390] Add dynamic size check for usercopy functions.

2006-12-04T14:40:45+00:00

Use a wrapper for copy_to/from_user to chose the best usercopy method.
The mvcos instruction is better for sizes greater than 256 bytes, if
mvcos is not available a page table walk is better for sizes greater
than 1024 bytes. Also removed the redundant copy_to/from_user_std_small
functions.

Signed-off-by: Gerald Schaefer 
Signed-off-by: Martin Schwidefsky

[S390] __div64_32 for 31 bit.

2006-09-28T14:55:39+00:00

The clocksource infrastructure introduced with commit
ad596171ed635c51a9eef829187af100cbf8dcf7 broke 31 bit s390.
The reason is that the do_div() primitive for 31 bit always
had a restriction: it could only divide an unsigned 64 bit
integer by an unsigned 31 bit integer. The clocksource code
now uses do_div() with a base value that has the most
significant bit set. The result is that clock->cycle_interval
has a funny value which causes the linux time to jump around
like mad.
The solution is "obvious": implement a proper __div64_32
function for 31 bit s390.

Signed-off-by: Martin Schwidefsky

[S390] Use alternative user-copy operations for new hardware.

2006-09-20T13:59:44+00:00

This introduces new user-copy operations which are optimized for
copying more than 256 Bytes on new hardware.

Signed-off-by: Gerald Schaefer 
Signed-off-by: Martin Schwidefsky