path: root/kernel/smpboot.c
diff options
authorPaul E. McKenney <>2012-07-12 01:55:54 -0700
committerThomas Gleixner <>2012-08-13 17:01:07 +0200
commit3180d89b47701072cf129f800a735baf3acdbb8a (patch)
tree345dea7130831f61095e6a55db6723a11f7f433c /kernel/smpboot.c
parentf97f8f06a49febbc3cb3635172efbe64ddc79700 (diff)
hotplug: Fix UP bug in smpboot hotplug code
Because kernel subsystems need their per-CPU kthreads on UP systems as well as on SMP systems, the smpboot hotplug kthread functions must be provided in UP builds as well as in SMP builds. This commit therefore adds smpboot.c to UP builds and excludes irrelevant code via #ifdef. Signed-off-by: Paul E. McKenney <> Signed-off-by: Paul E. McKenney <> Signed-off-by: Thomas Gleixner <>
Diffstat (limited to 'kernel/smpboot.c')
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index 9d5f7b04025d..d6c5fc054242 100644
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -15,6 +15,8 @@
#include "smpboot.h"
+#ifdef CONFIG_SMP
* For the hotplug case we keep the task structs around and reuse
@@ -72,6 +74,8 @@ void __init idle_threads_init(void)
+#endif /* #ifdef CONFIG_SMP */
static LIST_HEAD(hotplug_threads);
static DEFINE_MUTEX(smpboot_threads_lock);