From: Mike Travis <travis@sgi.com>
Date: Thu, 1 Jan 2009 01:34:16 +0000 (-0800)
Subject: Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux... 
X-Git-Tag: v2.6.29-rc1~521^2~11
X-Git-Url: http://www.pilppa.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=7eb19553369c46cc1fa64caf120cbcab1b597f7c;p=linux-2.6-omap-h63xx.git

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-cpumask into merge-rr-cpumask

Conflicts:
	arch/x86/kernel/io_apic.c
	kernel/rcuclassic.c
	kernel/sched.c
	kernel/time/tick-sched.c

Signed-off-by: Mike Travis <travis@sgi.com>
[ mingo@elte.hu: backmerged typo fix for io_apic.c ]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

7eb19553369c46cc1fa64caf120cbcab1b597f7c
diff --cc arch/powerpc/include/asm/topology.h
index 373fca394a5,236dae1cd29..375258559ae
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@@ -46,8 -46,13 +46,12 @@@ static inline int pcibus_to_node(struc
  					node_to_cpumask(pcibus_to_node(bus)) \
  				)
  
+ #define cpumask_of_pcibus(bus)	(pcibus_to_node(bus) == -1 ?		\
+ 				 cpu_all_mask :				\
+ 				 cpumask_of_node(pcibus_to_node(bus)))
+ 
  /* sched_domains SD_NODE_INIT for PPC64 machines */
  #define SD_NODE_INIT (struct sched_domain) {		\
 -	.span			= CPU_MASK_NONE,	\
  	.parent			= NULL,			\
  	.child			= NULL,			\
  	.groups			= NULL,			\
diff --cc arch/x86/include/asm/irq.h
index 4bb732e45a8,28e409fc73f..592688ed04d
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@@ -31,13 -31,9 +31,9 @@@ static inline int irq_canonicalize(int 
  # endif
  #endif
  
- #ifdef CONFIG_IRQBALANCE
- extern int irqbalance_disable(char *str);
- #endif
- 
  #ifdef CONFIG_HOTPLUG_CPU
  #include <linux/cpumask.h>
 -extern void fixup_irqs(cpumask_t map);
 +extern void fixup_irqs(void);
  #endif
  
  extern unsigned int do_IRQ(struct pt_regs *regs);
diff --cc kernel/sched.c
index 756d981d91a,f2095660efe..27ba1d642f0
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@@ -5477,17 -5426,8 +5495,16 @@@ long sched_setaffinity(pid_t pid, cons
  	get_task_struct(p);
  	read_unlock(&tasklist_lock);
  
 +	if (!alloc_cpumask_var(&cpus_allowed, GFP_KERNEL)) {
 +		retval = -ENOMEM;
 +		goto out_put_task;
 +	}
 +	if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) {
 +		retval = -ENOMEM;
 +		goto out_free_cpus_allowed;
 +	}
  	retval = -EPERM;
- 	if ((current->euid != p->euid) && (current->euid != p->uid) &&
- 			!capable(CAP_SYS_NICE))
+ 	if (!check_same_owner(p) && !capable(CAP_SYS_NICE))
  		goto out_unlock;
  
  	retval = security_task_setscheduler(p, 0, NULL);
diff --cc kernel/time/tick-sched.c
index 70f872c71f4,8f3fc2582d3..76a574bbef9
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@@ -282,8 -282,31 +282,31 @@@ void tick_nohz_stop_sched_tick(int inid
  	/* Schedule the tick, if we are at least one jiffie off */
  	if ((long)delta_jiffies >= 1) {
  
+ 		/*
+ 		* calculate the expiry time for the next timer wheel
+ 		* timer
+ 		*/
+ 		expires = ktime_add_ns(last_update, tick_period.tv64 *
+ 				   delta_jiffies);
+ 
+ 		/*
+ 		 * If this cpu is the one which updates jiffies, then
+ 		 * give up the assignment and let it be taken by the
+ 		 * cpu which runs the tick timer next, which might be
+ 		 * this cpu as well. If we don't drop this here the
+ 		 * jiffies might be stale and do_timer() never
+ 		 * invoked.
+ 		 */
+ 		if (cpu == tick_do_timer_cpu)
+ 			tick_do_timer_cpu = TICK_DO_TIMER_NONE;
+ 
  		if (delta_jiffies > 1)
 -			cpu_set(cpu, nohz_cpu_mask);
 +			cpumask_set_cpu(cpu, nohz_cpu_mask);
+ 
+ 		/* Skip reprogram of event if its not changed */
+ 		if (ts->tick_stopped && ktime_equal(expires, dev->next_event))
+ 			goto out;
+ 
  		/*
  		 * nohz_stop_sched_tick can be called several times before
  		 * the nohz_restart_sched_tick is called. This happens when