user/sven/linux.git/lib/mpi, branch v4.0

MPILIB: Fix comparison of negative MPIs

2015-01-14T16:10:12Z

If u and v both represent negative integers and their limb counts happen to differ, mpi_cmp will always return a positive value - this is obviously bogus. u is smaller than v if and only if it is larger in absolute value. Signed-off-by: Rasmus Villemoes Signed-off-by: David Howells Acked-by: Dmitry Kasatkin

MPILIB: Fix obvious but harmless typo

2015-01-14T15:16:00Z

The macro MPN_COPY_INCR this occurs in isn't used anywhere. Signed-off-by: Rasmus Villemoes Signed-off-by: David Howells

MPILIB: Deobfuscate mpi_cmp

2015-01-14T15:15:57Z

The condition preceding 'return 1;' makes my head hurt. At this point, we know that u and v have the same sign; if they are negative, they compare opposite to how their absolute values compare (which mpihelp_cmp found for us), otherwise cmp itself is the answer. Negating cmp is ok since mpihelp_cmp returns {-1,0,1}; -INT_MIN==INT_MIN won't bite us. Signed-off-by: Rasmus Villemoes Signed-off-by: David Howells Acked-by: Dmitry Kasatkin

MPILIB: add module description and license

2013-09-25T16:17:01Z

This patch fixes lack of license, otherwise mpi.ko taints kernel. Signed-off-by: Konstantin Khlebnikov Signed-off-by: David Howells

alpha: Modernize lib/mpi/longlong.h

2013-07-19T20:54:23Z

Remove the compile warning for __udiv_qrnnd not having a prototype. Use the __builtin_alpha_umulh introduced in gcc 4.0. Reviewed-and-Tested-by: Matt Turner Signed-off-by: Matt Turner Signed-off-by: Richard Henderson

lib/mpi/mpicoder.c: looping issue, need stop when equal to zero, found by 'EXTRA_FLAGS=-W'.

2013-06-12T23:29:44Z

For 'while' looping, need stop when 'nbytes == 0', or will cause issue. ('nbytes' is size_t which is always bigger or equal than zero). The related warning: (with EXTRA_CFLAGS=-W) lib/mpi/mpicoder.c:40:2: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] Signed-off-by: Chen Gang Cc: Rusty Russell Cc: David Howells Cc: James Morris Cc: Andy Shevchenko Acked-by: David Howells Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

MPILIB: disable usage of floating point registers on parisc

2013-05-24T20:30:11Z

The umul_ppmm() macro for parisc uses the xmpyu assembler statement which does calculation via a floating point register. But usage of floating point registers inside the Linux kernel are not allowed and gcc will stop compilation due to the -mdisable-fpregs compiler option. Fix this by disabling the umul_ppmm() and udiv_qrnnd() macros. The mpilib will then use the generic built-in implementations instead. Signed-off-by: Helge Deller

mpilib: use DIV_ROUND_UP and remove unused macros

2013-02-01T05:28:32Z

Remove MIN, MAX and ABS macros that are duplicates kernel's native implementation. Signed-off-by: Andy Shevchenko Signed-off-by: James Morris

MPI: Fix compilation on MIPS with GCC 4.4 and newer

2012-11-23T17:57:17Z

Since 4.4 GCC on MIPS no longer recognizes the "h" constraint, leading to this build failure: CC lib/mpi/generic_mpih-mul1.o lib/mpi/generic_mpih-mul1.c: In function 'mpihelp_mul_1': lib/mpi/generic_mpih-mul1.c:50:3: error: impossible constraint in 'asm' This patch updates MPI with the latest umul_ppm implementations for MIPS. Signed-off-by: Manuel Lauss Cc: Linux-MIPS Cc: Dmitry Kasatkin Cc: James Morris Patchwork: https://patchwork.linux-mips.org/patch/4612/ Signed-off-by: Ralf Baechle

MPILIB: Provide a function to read raw data into an MPI

2012-10-08T03:20:21Z

Provide a function to read raw data of a predetermined size into an MPI rather than expecting the size to be encoded within the data. The data is assumed to represent an unsigned integer, and the resulting MPI will be positive. The function looks like this: MPI mpi_read_raw_data(const void *, size_t); This is useful for reading ASN.1 integer primitives where the length is encoded in the ASN.1 metadata. Signed-off-by: David Howells Signed-off-by: Rusty Russell