riscv: spinwait: Fix hartid variable type

The hartid variable is of type int but compared with
ULONG_MAX(INVALID_HARTID). This issue is fixed by changing
the hartid variable type to unsigned long.

Fixes: c78f94f ("RISC-V: Use __cpu_up_stack/task_pointer only for spinwait method")

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20220527051743.2829940-3-sunilvl@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>

Author: vlsunil

arch/riscv/kernel/cpu_ops_spinwait.c

@@ -18,7 +18,7 @@ void *__cpu_spinwait_task_pointer[NR_CPUS] __section(".data");
 static void cpu_update_secondary_bootdata(unsigned int cpuid,
 				   struct task_struct *tidle)
 {
-	int hartid = cpuid_to_hartid_map(cpuid);
+	unsigned long hartid = cpuid_to_hartid_map(cpuid);
 
 	/*
 	 * The hartid must be less than NR_CPUS to avoid out-of-bound access
@@ -27,7 +27,7 @@ static void cpu_update_secondary_bootdata(unsigned int cpuid,
 	 * spinwait booting is not the recommended approach for any platforms
 	 * booting Linux in S-mode and can be disabled in the future.
 	 */
-	if (hartid == INVALID_HARTID || hartid >= NR_CPUS)
+	if (hartid == INVALID_HARTID || hartid >= (unsigned long) NR_CPUS)
 		return;
 
 	/* Make sure tidle is updated */