x86/mce: Remove function-local cpus variables

Use num_online_cpus() directly.

No functional changes.

Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

Author: suryasaimadhu

arch/x86/kernel/cpu/mce/core.c

@@ -985,7 +985,6 @@ static atomic_t global_nwo;
 static int mce_start(int *no_way_out)
 {
 	int order;
-	int cpus = num_online_cpus();
 	u64 timeout = (u64)mca_cfg.monarch_timeout * NSEC_PER_USEC;
 
 	if (!timeout)
@@ -1002,7 +1001,7 @@ static int mce_start(int *no_way_out)
 	/*
 	 * Wait for everyone.
 	 */
-	while (atomic_read(&mce_callin) != cpus) {
+	while (atomic_read(&mce_callin) != num_online_cpus()) {
 		if (mce_timed_out(&timeout,
 				  "Timeout: Not all CPUs entered broadcast exception handler")) {
 			atomic_set(&global_nwo, 0);
@@ -1066,14 +1065,11 @@ static int mce_end(int order)
 	atomic_inc(&mce_executing);
 
 	if (order == 1) {
-		/* CHECKME: Can this race with a parallel hotplug? */
-		int cpus = num_online_cpus();
-
 		/*
 		 * Monarch: Wait for everyone to go through their scanning
 		 * loops.
 		 */
-		while (atomic_read(&mce_executing) <= cpus) {
+		while (atomic_read(&mce_executing) <= num_online_cpus()) {
 			if (mce_timed_out(&timeout,
 					  "Timeout: Monarch CPU unable to finish machine check processing"))
 				goto reset;