diff options
| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-07-12 01:55:54 -0700 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2012-07-26 10:29:26 +0100 |
| commit | 0ce23d9b87b72b1c7601daa5226a9b6f011e7939 (patch) | |
| tree | 1ad5443612c259d2c64a070c7eb966c620b4d1be | |
| parent | 495bcbed25d49dfaebfe4a8937f9f7667a0c0506 (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 <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
| -rw-r--r-- | kernel/Makefile | 3 | ||||
| -rw-r--r-- | kernel/smpboot.c | 4 |
2 files changed, 5 insertions, 2 deletions
diff --git a/kernel/Makefile b/kernel/Makefile index c0cc67ad764..e5602d32acb 100644 --- a/kernel/Makefile +++ b/kernel/Makefile @@ -10,7 +10,7 @@ obj-y = fork.o exec_domain.o panic.o printk.o \ kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \ hrtimer.o rwsem.o nsproxy.o srcu.o semaphore.o \ notifier.o ksysfs.o cred.o \ - async.o range.o groups.o lglock.o + async.o range.o groups.o lglock.o smpboot.o ifdef CONFIG_FUNCTION_TRACER # Do not trace debug files and internal ftrace files @@ -46,7 +46,6 @@ obj-$(CONFIG_DEBUG_RT_MUTEXES) += rtmutex-debug.o obj-$(CONFIG_RT_MUTEX_TESTER) += rtmutex-tester.o obj-$(CONFIG_GENERIC_ISA_DMA) += dma.o obj-$(CONFIG_SMP) += smp.o -obj-$(CONFIG_SMP) += smpboot.o ifneq ($(CONFIG_SMP),y) obj-y += up.o endif diff --git a/kernel/smpboot.c b/kernel/smpboot.c index b2545c843a9..0a49ee70054 100644 --- a/kernel/smpboot.c +++ b/kernel/smpboot.c @@ -15,6 +15,8 @@ #include "smpboot.h" +#ifdef CONFIG_SMP + #ifdef CONFIG_GENERIC_SMP_IDLE_THREAD /* * For the hotplug case we keep the task structs around and reuse @@ -72,6 +74,8 @@ void __init idle_threads_init(void) } #endif +#endif /* #ifdef CONFIG_SMP */ + static LIST_HEAD(hotplug_threads); static DEFINE_MUTEX(smpboot_threads_lock); |