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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse source 
Pull scheduler fixes from Ingo Molnar.

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix incorrect usage of for_each_cpu_mask() in select_fallback_rq()
  sched: Fix __schedule_bug() output when called from an interrupt
  sched/arch: Introduce the finish_arch_post_lock_switch() scheduler callback
This commit is contained in:
Linus Torvalds 2012-03-31 13:35:31 -07:00
commit f22e08a79f
2 changed files with 7 additions and 9 deletions
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13
kernel/sched/core.c
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@ -1270,7 +1270,7 @@ static int select_fallback_rq(int cpu, struct task_struct *p)
int dest_cpu;
/* Look for allowed, online CPU in same node. */
for_each_cpu_mask(dest_cpu, *nodemask) {
for_each_cpu(dest_cpu, nodemask) {
if (!cpu_online(dest_cpu))
continue;
if (!cpu_active(dest_cpu))
@ -1281,7 +1281,7 @@ static int select_fallback_rq(int cpu, struct task_struct *p)
for (;;) {
/* Any allowed, online CPU? */
for_each_cpu_mask(dest_cpu, *tsk_cpus_allowed(p)) {
for_each_cpu(dest_cpu, tsk_cpus_allowed(p)) {
if (!cpu_online(dest_cpu))
continue;
if (!cpu_active(dest_cpu))
@ -1964,6 +1964,7 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
local_irq_enable();
#endif /* __ARCH_WANT_INTERRUPTS_ON_CTXSW */
finish_lock_switch(rq, prev);
finish_arch_post_lock_switch();
fire_sched_in_preempt_notifiers(current);
if (mm)
@ -3101,8 +3102,6 @@ EXPORT_SYMBOL(sub_preempt_count);
*/
static noinline void __schedule_bug(struct task_struct *prev)
{
struct pt_regs *regs = get_irq_regs();
if (oops_in_progress)
return;
@ -3113,11 +3112,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
print_modules();
if (irqs_disabled())
print_irqtrace_events(prev);
if (regs)
show_regs(regs);
else
dump_stack();
dump_stack();
}
/*

3
kernel/sched/sched.h
View file

@ -681,6 +681,9 @@ static inline int task_running(struct rq *rq, struct task_struct *p)
#ifndef finish_arch_switch
# define finish_arch_switch(prev) do { } while (0)
#endif
#ifndef finish_arch_post_lock_switch
# define finish_arch_post_lock_switch() do { } while (0)
#endif
#ifndef __ARCH_WANT_UNLOCKED_CTXSW
static inline void prepare_lock_switch(struct rq *rq, struct task_struct *next)