kernel.git/arch/s390/lib/Makefile, branch linux-3.7.y

s390/string: provide asm lib functions for memcpy and memcmp

2012-09-26T13:44:50Z

Our memcpy and memcmp variants were implemented by calling the corresponding gcc builtin variants. However gcc is free to replace a call to __builtin_memcmp with a call to memcmp which, when called, will result in an endless recursion within memcmp. So let's provide asm variants and also fix the variants that are used for uncompressing the kernel image. In addition remove all other occurences of builtin function calls. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky

[S390] uaccess: make sure copy_from_user_overflow is builtin

2010-03-08T11:25:29Z

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

2010-02-26T21:37:29Z

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

2009-07-07T14:37:53Z

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

2008-04-30T11:38:44Z

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

[S390] Bogomips calculation for 64 bit.

2007-07-10T09:24:47Z

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.

2007-04-26T05:28:53Z

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.

2007-02-05T20:18:31Z

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.

2006-12-04T14:40:45Z

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.

2006-09-28T14:55:39Z

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