linux-toradex.git/lib/math, branch v6.6-rc3

lib/math/int_log: Replace LGPL-2.1-or-later boilerplate with SPDX identifier

2023-07-09T21:47:50+00:00

Replace license boilerplate in udftime.c with SPDX identifier for
LGPL-2.1-or-later.

Acked-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/20230619172019.21457-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20230703135211.87416-4-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown

lib/math/int_log: Use ARRAY_SIZE(logtable) where makes sense

2023-07-09T21:47:49+00:00

Use ARRAY_SIZE(logtable) where makes sense.

Reviewed-by: Mauro Carvalho Chehab 
Acked-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/20230619172019.21457-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/20230703135211.87416-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown

lib/math: Move dvb_math.c into lib/math/int_log.c

2023-07-09T21:47:48+00:00

Some existing and new users may benefit from the intlog2() and
intlog10() APIs, make them wide available.

Reviewed-by: Mauro Carvalho Chehab 
Acked-by: Mauro Carvalho Chehab 
Link: https://lore.kernel.org/r/20230619172019.21457-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko 
Reviewed-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20230703135211.87416-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown

math64: favor kernel-doc from header files

2022-11-21T21:30:53+00:00

Fix the kernel-doc markings for div64 functions to point to the header
file instead of the lib/ directory.  This avoids having implementation
specific comments in generic documentation.  Furthermore, given that
some kernel-doc comments are identical, drop them from lib/math64 and
only keep there comments that add implementation details.

Signed-off-by: Liam Beguin 
Acked-by: Randy Dunlap 
Tested-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20221118182309.3824530-1-liambeguin@gmail.com
Signed-off-by: Jonathan Corbet

math: make RATIONAL tristate

2021-09-08T18:50:26+00:00

Patch series "math: RATIONAL and RATIONAL_KUNIT_TEST improvements".

This series makes the RATIONAL symbol tristate, so it is not forced
builtin if all users are modular, and makes the RATIONAL_KUNIT_TEST depend
on RATIONAL, to avoid enabling RATIONAL if there are no real users.

This patch (of 2):

All but one symbols that select RATIONAL are tristate, but RATIONAL itself
is bool.  Change it to tristate, so the rational fractions support code
can be modular if no builtin code relies on it.

Link: https://lkml.kernel.org/r/20210706100945.3803694-1-geert@linux-m68k.org
Link: https://lkml.kernel.org/r/20210706100945.3803694-2-geert@linux-m68k.org
Signed-off-by: Geert Uytterhoeven 
Reviewed-by: Andy Shevchenko 
Cc: Trent Piepho 
Cc: Colin Ian King 
Cc: Brendan Higgins 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lib/math/rational: add Kunit test cases

2021-07-01T18:06:05+00:00

Adds a number of test cases that cover a range of possible code paths.

[akpm@linux-foundation.org: remove non-ascii characters, fix whitespace]
[colin.king@canonical.com: fix spelling mistake "demominator" -> "denominator"]
  Link: https://lkml.kernel.org/r/20210526085049.6393-1-colin.king@canonical.com

Link: https://lkml.kernel.org/r/20210525144250.214670-2-tpiepho@gmail.com
Signed-off-by: Trent Piepho 
Signed-off-by: Colin Ian King 
Reviewed-by: Andy Shevchenko 
Cc: Daniel Latypov 
Cc: Oskar Schirmer 
Cc: Yiyuan Guo 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lib/math/rational.c: fix divide by zero

2021-07-01T18:06:05+00:00

If the input is out of the range of the allowed values, either larger than
the largest value or closer to zero than the smallest non-zero allowed
value, then a division by zero would occur.

In the case of input too large, the division by zero will occur on the
first iteration.  The best result (largest allowed value) will be found by
always choosing the semi-convergent and excluding the denominator based
limit when finding it.

In the case of the input too small, the division by zero will occur on the
second iteration.  The numerator based semi-convergent should not be
calculated to avoid the division by zero.  But the semi-convergent vs
previous convergent test is still needed, which effectively chooses
between 0 (the previous convergent) vs the smallest allowed fraction (best
semi-convergent) as the result.

Link: https://lkml.kernel.org/r/20210525144250.214670-1-tpiepho@gmail.com
Fixes: 323dd2c3ed0 ("lib/math/rational.c: fix possible incorrect result from rational fractions helper")
Signed-off-by: Trent Piepho 
Reported-by: Yiyuan Guo 
Reviewed-by: Andy Shevchenko 
Cc: Oskar Schirmer 
Cc: Daniel Latypov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

2021-04-29T18:28:08+00:00

Pull MIPS updates from Thomas Bogendoerfer:

 - removed get_fs/set_fs

 - removed broken/unmaintained MIPS KVM trap and emulate support

 - added support for Loongson-2K1000

 - fixes and cleanups

* tag 'mips_5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (107 commits)
  MIPS: BCM63XX: Use BUG_ON instead of condition followed by BUG.
  MIPS: select ARCH_KEEP_MEMBLOCK unconditionally
  mips: Do not include hi and lo in clobber list for R6
  MIPS:DTS:Correct the license for Loongson-2K
  MIPS:DTS:Fix label name and interrupt number of ohci for Loongson-2K
  MIPS: Avoid handcoded DIVU in `__div64_32' altogether
  lib/math/test_div64: Correct the spelling of "dividend"
  lib/math/test_div64: Fix error message formatting
  mips/bootinfo:correct some comments of fw_arg
  MIPS: Avoid DIVU in `__div64_32' is result would be zero
  MIPS: Reinstate platform `__div64_32' handler
  div64: Correct inline documentation for `do_div'
  lib/math: Add a `do_div' test module
  MIPS: Makefile: Replace -pg with CC_FLAGS_FTRACE
  MIPS: pci-legacy: revert "use generic pci_enable_resources"
  MIPS: Loongson64: Add kexec/kdump support
  MIPS: pci-legacy: use generic pci_enable_resources
  MIPS: pci-legacy: remove busn_resource field
  MIPS: pci-legacy: remove redundant info messages
  MIPS: pci-legacy: stop using of_pci_range_to_resource
  ...

lib/math/test_div64: Correct the spelling of "dividend"

2021-04-23T11:40:05+00:00

The word is spelt with a final "d" of course.  What a massive messup!

Signed-off-by: Maciej W. Rozycki 
Signed-off-by: Thomas Bogendoerfer

lib/math/test_div64: Fix error message formatting

2021-04-21T14:14:51+00:00

Align the expected result with one actually produced for easier visual
comparison; this has to take into account what the format specifiers
will actually produce rather than the characters they consist of.  E.g.:

test_div64: ERROR: 10000000ab275080 / 00000009 => 01c71c71da20d00e,00000002
test_div64: ERROR: expected value              => 0000000013045e47,00000001

(with a failure induced by setting bit #60 of the divident).

Signed-off-by: Maciej W. Rozycki 
Signed-off-by: Thomas Bogendoerfer