kernel/amd64: mp: Use NULL instead of wrapping

It is best to return NULL when there is no next CPU instead of wrapping
so we have an indicator at where the list ends.

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/sys/arch/amd64/cpu/cpu_mp.c b/src/sys/arch/amd64/cpu/cpu_mp.c
index 3483e4a..28ca6ee 100644
--- a/src/sys/arch/amd64/cpu/cpu_mp.c
+++ b/src/sys/arch/amd64/cpu/cpu_mp.c
@@ -89,8 +89,8 @@ cpu_get(uint16_t index)
         return &g_bsp;
     }
 
-    if ((index - 1) >= ncores_up) {
-        index %= (ncores_up - 1);
+    if ((index - 1) >= (ncores_up - 1)) {
+        return NULL;
     }
 
     return corelist[index - 1];