jhb 8eea4337db Fix atomic_*cmpset32 on riscv64 with clang. ... The lr.w instruction used to read the value from memory sign-extends the value read from memory. GCC sign-extends the 32-bit comparison value passed in whereas clang currently does not. As a result, if the value being compared has the MSB set, the comparison fails for matching 32-bit values when compiled with clang. Use a cast to explicitly sign-extend the unsigned comparison value. This works with both GCC and clang. There is commentary in the RISC-V spec that suggests that GCC's approach is more correct, but it is not clear if the commentary in the RISC-V spec is binding. Reviewed by: mhorne Obtained from: Axiado MFC after: 2 weeks Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D22084		2019-10-23 16:41:31 +00:00
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conf	RISC-V: Support EARLY_AP_STARTUP	2019-09-16 22:17:16 +00:00
include	Fix atomic_*cmpset32 on riscv64 with clang.	2019-10-23 16:41:31 +00:00
riscv	Fix thread0 kernel stack initialization on riscv.	2019-10-22 16:52:56 +00:00