livepatch: Move the result-invariant calculation out of the loop

The calculation results of the variables 'func_addr' and 'func_size' are
not affected by the for loop and do not change due to the changes of
entries[i]. The performance can be improved by moving it outside the loop.

No functional change.
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

kernel/livepatch/transition.c

@@ -196,9 +196,6 @@ static int klp_check_stack_func(struct klp_func *func, unsigned long *entries,
 	struct klp_ops *ops;
 	int i;
 
-	for (i = 0; i < nr_entries; i++) {
-		address = entries[i];
-
 	if (klp_target_state == KLP_UNPATCHED) {
 		 /*
 		  * Check for the to-be-unpatched function
@@ -227,6 +224,9 @@ static int klp_check_stack_func(struct klp_func *func, unsigned long *entries,
 		}
 	}
 
+	for (i = 0; i < nr_entries; i++) {
+		address = entries[i];
+
 		if (address >= func_addr && address < func_addr + func_size)
 			return -EAGAIN;
 	}