[PATCH] Fix build for smp

[Etienne Brateau]

ad51c68171cb6a1cae15c61ca0218bbee2c05485 missed one replacement which
was not discovered because it’s only when building with smp enabled.
---
 i386/intel/pmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/i386/intel/pmap.c b/i386/intel/pmap.c
index 00a18402..63f372a9 100644
--- a/i386/intel/pmap.c
+++ b/i386/intel/pmap.c
@@ -2884,7 +2884,7 @@ void    signal_cpus(
        int                     which_cpu, j;
        pmap_update_list_t      update_list_p;
 
-       while ((which_cpu = ffs(use_list)) != 0) {
+       while ((which_cpu = __builtin_ffs(use_list)) != 0) {
            which_cpu -= 1;     /* convert to 0 origin */
 
            update_list_p = &cpu_update_list[which_cpu];
-- 
2.39.0