powerpc/rtas: remove rtas_suspend_cpu()

rtas_suspend_cpu() no longer has users; remove it and
__rtas_suspend_cpu() which now becomes unused as well.
Signed-off-by: Nathan Lynch <nathanl@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201207215200.1785968-22-nathanl@linux.ibm.com

arch/powerpc/include/asm/rtas.h

@@ -256,7 +256,6 @@ extern bool rtas_indicator_present(int token, int *maxindex);
 extern int rtas_set_indicator(int indicator, int index, int new_value);
 extern int rtas_set_indicator_fast(int indicator, int index, int new_value);
 extern void rtas_progress(char *s, unsigned short hex);
-extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
 extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
 int rtas_ibm_suspend_me(int *fw_status);
 

arch/powerpc/kernel/rtas.c

@@ -873,58 +873,6 @@ int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data)
 	return __rtas_suspend_last_cpu(data, 0);
 }
 
-static int __rtas_suspend_cpu(struct rtas_suspend_me_data *data, int wake_when_done)
-{
-	long rc = H_SUCCESS;
-	unsigned long msr_save;
-	int cpu;
-
-	atomic_inc(&data->working);
-
-	/* really need to ensure MSR.EE is off for H_JOIN */
-	msr_save = mfmsr();
-	mtmsr(msr_save & ~(MSR_EE));
-
-	while (rc == H_SUCCESS && !atomic_read(&data->done) && !atomic_read(&data->error))
-		rc = plpar_hcall_norets(H_JOIN);
-
-	mtmsr(msr_save);
-
-	if (rc == H_SUCCESS) {
-		/* This cpu was prodded and the suspend is complete. */
-		goto out;
-	} else if (rc == H_CONTINUE) {
-		/* All other cpus are in H_JOIN, this cpu does
-		 * the suspend.
-		 */
-		return __rtas_suspend_last_cpu(data, wake_when_done);
-	} else {
-		printk(KERN_ERR "H_JOIN on cpu %i failed with rc = %ld\n",
-		       smp_processor_id(), rc);
-		atomic_set(&data->error, rc);
-	}
-
-	if (wake_when_done) {
-		atomic_set(&data->done, 1);
-
-		/* This cpu did the suspend or got an error; in either case,
-		 * we need to prod all other other cpus out of join state.
-		 * Extra prods are harmless.
-		 */
-		for_each_online_cpu(cpu)
-			plpar_hcall_norets(H_PROD, get_hard_smp_processor_id(cpu));
-	}
-out:
-	if (atomic_dec_return(&data->working) == 0)
-		complete(data->complete);
-	return rc;
-}
-
-int rtas_suspend_cpu(struct rtas_suspend_me_data *data)
-{
-	return __rtas_suspend_cpu(data, 0);
-}
-
 /**
  * rtas_call_reentrant() - Used for reentrant rtas calls
  * @token:	Token for desired reentrant RTAS call