Christoph Müllner 81c7f6193c RISC-V: Execute a PAUSE hint in spin loops ... The atomic_spin_nop() macro can be used to run arch-specific code in the body of a spin loop to potentially improve efficiency. RISC-V's Zihintpause extension includes a PAUSE instruction for this use-case, which is encoded as a HINT, which means that it behaves like a NOP on systems that don't implement Zihintpause. Binutils supports Zihintpause since 2.36, so this patch uses the ".insn" directive to keep the code compatible with older toolchains. Signed-off-by: Christoph Müllner <christoph.muellner@vrull.eu> Reviewed-by: Palmer Dabbelt <palmer@rivosinc.com> Acked-by: Palmer Dabbelt <palmer@rivosinc.com>		2024-06-24 21:36:49 +02:00
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linux	RISC-V: Execute a PAUSE hint in spin loops	2024-06-24 21:36:49 +02:00