The check_unaligned_access_emulated() function should have been called during CPU hotplug to ensure that if all CPUs had emulated unaligned accesses, the new CPU also does.
This patch adds the call to check_unaligned_access_emulated() in the hotplug path.
Fixes: 55e0bf49a0d0 ("RISC-V: Probe misaligned access speed in parallel") Signed-off-by: Jesse Taube jesse@rivosinc.com Reviewed-by: Evan Green evan@rivosinc.com Cc: stable@vger.kernel.org --- V5 -> V6: - New patch V6 -> V7: - No changes --- arch/riscv/kernel/unaligned_access_speed.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/riscv/kernel/unaligned_access_speed.c b/arch/riscv/kernel/unaligned_access_speed.c index a9a6bcb02acf..b67db1fc3740 100644 --- a/arch/riscv/kernel/unaligned_access_speed.c +++ b/arch/riscv/kernel/unaligned_access_speed.c @@ -191,6 +191,7 @@ static int riscv_online_cpu(unsigned int cpu) if (per_cpu(misaligned_access_speed, cpu) != RISCV_HWPROBE_MISALIGNED_UNKNOWN) goto exit;
+ check_unaligned_access_emulated(NULL); buf = alloc_pages(GFP_KERNEL, MISALIGNED_BUFFER_ORDER); if (!buf) { pr_warn("Allocation failure, not measuring misaligned performance\n");