kernel/linux.git/lib/crc32.c, branch v6.6.132

lib/crc32: Make crc32_be weak for arch override

2022-01-31T00:21:43+00:00

crc32_le and __crc32c_le can be overridden - extend this to crc32_be. Signed-off-by: Kevin Bracey Signed-off-by: Herbert Xu

lib/crc32: remove unneeded casts

2022-01-31T00:21:43+00:00

Casts were added in commit 8f243af42ade ("sections: fix const sections for crc32 table") to cope with the tables not being const. They are no longer required since commit f5e38b9284e1 ("lib: crc32: constify crc32 lookup table"). Signed-off-by: Kevin Bracey Signed-off-by: Herbert Xu

lib/crc32.c: fix trivial typo in preprocessor condition

2020-10-16T18:11:20+00:00

Whether crc32_be needs a lookup table is chosen based on CRC_LE_BITS. Obviously, the _be function should be governed by the _BE_ define. This probably never pops up as it's hard to come up with a configuration where CRC_BE_BITS isn't the same as CRC_LE_BITS and as nobody is using bitwise CRC anyway. Fixes: 46c5801eaf86 ("crc32: bolt on crc32c") Signed-off-by: Tobias Jordan Signed-off-by: Andrew Morton Cc: Krzysztof Kozlowski Cc: Jonathan Corbet Cc: Mauro Carvalho Chehab Link: https://lkml.kernel.org/r/20200923182122.GA3338@agrajag.zerfleddert.de Signed-off-by: Linus Torvalds

docs: move remaining stuff under Documentation/*.txt to Documentation/staging

2020-06-19T20:17:05+00:00

There are several files that I was unable to find a proper place for them, and 3 ones that are still in plain old text format. Let's place those stuff behind the carpet, as we'd like to keep the root directory clean. We can later discuss and move those into better places. Signed-off-by: Mauro Carvalho Chehab Link: https://lore.kernel.org/r/11bd0d75e65a874f7c276a0aeab0fe13f3376f5f.1592203650.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet

lib/crc32.c: mark crc32_le_base/__crc32c_le_base aliases as __pure

2019-02-15T18:50:07+00:00

The upcoming GCC 9 release extends the -Wmissing-attributes warnings (enabled by -Wall) to C and aliases: it warns when particular function attributes are missing in the aliases but not in their target. In particular, it triggers here because crc32_le_base/__crc32c_le_base aren't __pure while their target crc32_le/__crc32c_le are. These aliases are used by architectures as a fallback in accelerated versions of CRC32. See commit 9784d82db3eb ("lib/crc32: make core crc32() routines weak so they can be overridden"). Therefore, being fallbacks, it is likely that even if the aliases were called from C, there wouldn't be any optimizations possible. Currently, the only user is arm64, which calls this from asm. Still, marking the aliases as __pure makes sense and is a good idea for documentation purposes and possible future optimizations, which also silences the warning. Acked-by: Ard Biesheuvel Tested-by: Laura Abbott Signed-off-by: Miguel Ojeda

lib/crc32: make core crc32() routines weak so they can be overridden

2018-09-10T15:09:27+00:00

Allow architectures to drop in accelerated CRC32 routines by making the crc32_le/__crc32c_le entry points weak, and exposing non-weak aliases for them that may be used by the accelerated versions as fallbacks in case the instructions they rely upon are not available. Acked-by: Herbert Xu Signed-off-by: Ard Biesheuvel Signed-off-by: Catalin Marinas

lib/crc: Use consistent naming for CRC-32 polynomials

2018-07-27T11:04:33+00:00

Header was defining CRCPOLY_LE/BE and CRC32C_POLY_LE but in fact all of them are CRC-32 polynomials so use consistent naming. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Herbert Xu

lib/crc: Move polynomial definition to separate header

2018-07-27T11:04:33+00:00

Allow other drivers and parts of kernel to use the same define for CRC32 polynomial, instead of duplicating it in many places. This code does not bring any functional changes, except moving existing code. Signed-off-by: Krzysztof Kozlowski Signed-off-by: Herbert Xu

docs: clean up and add rest of CRC functions to kernel-api.rst

2017-09-26T21:01:20+00:00

Add the rest of the CRC library functions to kernel-api. - try to clarify crc32() by adding '@' to a function parameter - reorder kernel-api CRC functions to be less random - add more CRC functions to kernel-api - correct the function parameter names in several places Signed-off-by: Randy Dunlap Signed-off-by: Jonathan Corbet

lib: add module support to crc32 tests

2017-02-25T01:46:57+00:00

Extract the crc32 test code into its own source file, to allow to compile it either to a loadable module, or builtin into the kernel. Link: http://lkml.kernel.org/r/1483470276-10517-1-git-send-email-geert@linux-m68k.org Signed-off-by: Geert Uytterhoeven Reviewed-by: Andy Shevchenko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds