linux/arch/riscv/include
Nathan Huckleberry 6c58f25e69
riscv/atomic: Fix sign extension for RV64I
The argument passed to cmpxchg is not guaranteed to be sign
extended, but lr.w sign extends on RV64I. This makes cmpxchg
fail on clang built kernels when __old is negative.

To fix this, we just cast __old to long which sign extends on
RV64I. With this fix, clang built RISC-V kernels now boot.

Link: https://github.com/ClangBuiltLinux/linux/issues/867
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-06-12 12:07:58 -07:00
..
asm riscv/atomic: Fix sign extension for RV64I 2020-06-12 12:07:58 -07:00
uapi/asm riscv, bpf: Add missing uapi header for BPF_PROG_TYPE_PERF_EVENT programs 2019-12-19 16:03:31 +01:00