Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6

* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
  [IA64] wire up sendmmsg() syscall for Itanium

diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 9089b04211919506cb1a443025d0f058d5deff3c..7667db448aa73cc58aacaf72e74fa0c5a2339fc6 100644 (file)
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -715,7 +715,8 @@ static struct syscore_ops pmacpic_syscore_ops = {
 
 static int __init init_pmacpic_syscore(void)
 {
-       register_syscore_ops(&pmacpic_syscore_ops);
+       if (pmac_irq_hw[0])
+               register_syscore_ops(&pmacpic_syscore_ops);
        return 0;
 }
 

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index f5abe3a245b84ce698472051d873b33f882a9d97..90b06d4daee252e758f72af1d4566c5c58fbd5a6 100644 (file)
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -8,6 +8,7 @@ CPPFLAGS_vmlinux.lds += -U$(UTS_MACHINE)
 
 ifdef CONFIG_FUNCTION_TRACER
 # Do not profile debug and lowlevel utilities
+CFLAGS_REMOVE_tsc.o = -pg
 CFLAGS_REMOVE_rtc.o = -pg
 CFLAGS_REMOVE_paravirt-spinlocks.o = -pg
 CFLAGS_REMOVE_pvclock.o = -pg
@@ -28,6 +29,7 @@ CFLAGS_paravirt.o     := $(nostackp)
 GCOV_PROFILE_vsyscall_64.o     := n
 GCOV_PROFILE_hpet.o            := n
 GCOV_PROFILE_tsc.o             := n
+GCOV_PROFILE_vread_tsc_64.o    := n
 GCOV_PROFILE_paravirt.o                := n
 
 # vread_tsc_64 is hot and should be fully optimized:

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 426a5b66f7e40a51caaf24932af01b7c36656a24..2e4928d45a2dd476d89904778df6ac2dbf5e681c 100644 (file)
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -642,7 +642,7 @@ static int __init idle_setup(char *str)
                boot_option_idle_override = IDLE_POLL;
        } else if (!strcmp(str, "mwait")) {
                boot_option_idle_override = IDLE_FORCE_MWAIT;
-               WARN_ONCE(1, "\idle=mwait\" will be removed in 2012\"\n");
+               WARN_ONCE(1, "\"idle=mwait\" will be removed in 2012\n");
        } else if (!strcmp(str, "halt")) {
                /*
                 * When the boot option of idle=halt is added, halt is

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index eefd96765e79a1c7ded62bd86c9d2c5da8c95062..33a0c11797de758004b399225eec21db5a1e932e 100644 (file)
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1332,7 +1332,7 @@ static inline void mwait_play_dead(void)
        void *mwait_ptr;
        struct cpuinfo_x86 *c = __this_cpu_ptr(&cpu_info);
 
-       if (!this_cpu_has(X86_FEATURE_MWAIT) && mwait_usable(c))
+       if (!(this_cpu_has(X86_FEATURE_MWAIT) && mwait_usable(c)))
                return;
        if (!this_cpu_has(X86_FEATURE_CLFLSH))
                return;

diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c
index 87d95a8cddbc4223c77e9aa642292b784912b807..f55ae23b137e2a21001948e1c4b6b17795abc1b0 100644 (file)
--- a/fs/autofs4/root.c
+++ b/fs/autofs4/root.c
@@ -583,8 +583,6 @@ static int autofs4_dir_unlink(struct inode *dir, struct dentry *dentry)
        if (!autofs4_oz_mode(sbi) && !capable(CAP_SYS_ADMIN))
                return -EACCES;
 
-       dentry_unhash(dentry);
-
        if (atomic_dec_and_test(&ino->count)) {
                p_ino = autofs4_dentry_ino(dentry->d_parent);
                if (p_ino && dentry->d_parent != dentry)

diff --git a/fs/namei.c b/fs/namei.c
index 1ab641f2e78ebdddff0306073ddbb0d06685f004..e2e4e8d032ee47cc899007443482a823caf30535 100644 (file)
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2579,6 +2579,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
        if (error)
                goto out;
 
+       shrink_dcache_parent(dentry);
        error = dir->i_op->rmdir(dir, dentry);
        if (error)
                goto out;
@@ -2993,6 +2994,8 @@ static int vfs_rename_dir(struct inode *old_dir, struct dentry *old_dentry,
        if (d_mountpoint(old_dentry) || d_mountpoint(new_dentry))
                goto out;
 
+       if (target)
+               shrink_dcache_parent(new_dentry);
        error = old_dir->i_op->rename(old_dir, old_dentry, new_dir, new_dentry);
        if (error)
                goto out;

diff --git a/kernel/rcutree.c b/kernel/rcutree.c
index 77a7671dd1472b10567fcaba0fd0d308565215cc..89419ff92e996c1e52fade38475ba14604a8f7bd 100644 (file)
--- a/kernel/rcutree.c
+++ b/kernel/rcutree.c
@@ -1648,7 +1648,6 @@ static int __cpuinit rcu_spawn_one_cpu_kthread(int cpu)
        if (IS_ERR(t))
                return PTR_ERR(t);
        kthread_bind(t, cpu);
-       set_task_state(t, TASK_INTERRUPTIBLE);
        per_cpu(rcu_cpu_kthread_cpu, cpu) = cpu;
        WARN_ON_ONCE(per_cpu(rcu_cpu_kthread_task, cpu) != NULL);
        per_cpu(rcu_cpu_kthread_task, cpu) = t;
@@ -1756,7 +1755,6 @@ static int __cpuinit rcu_spawn_one_node_kthread(struct rcu_state *rsp,
                if (IS_ERR(t))
                        return PTR_ERR(t);
                raw_spin_lock_irqsave(&rnp->lock, flags);
-               set_task_state(t, TASK_INTERRUPTIBLE);
                rnp->node_kthread_task = t;
                raw_spin_unlock_irqrestore(&rnp->lock, flags);
                sp.sched_priority = 99;
@@ -1765,6 +1763,8 @@ static int __cpuinit rcu_spawn_one_node_kthread(struct rcu_state *rsp,
        return rcu_spawn_one_boost_kthread(rsp, rnp, rnp_index);
 }
 
+static void rcu_wake_one_boost_kthread(struct rcu_node *rnp);
+
 /*
  * Spawn all kthreads -- called as soon as the scheduler is running.
  */
@@ -1772,18 +1772,30 @@ static int __init rcu_spawn_kthreads(void)
 {
        int cpu;
        struct rcu_node *rnp;
+       struct task_struct *t;
 
        rcu_kthreads_spawnable = 1;
        for_each_possible_cpu(cpu) {
                per_cpu(rcu_cpu_has_work, cpu) = 0;
-               if (cpu_online(cpu))
+               if (cpu_online(cpu)) {
                        (void)rcu_spawn_one_cpu_kthread(cpu);
+                       t = per_cpu(rcu_cpu_kthread_task, cpu);
+                       if (t)
+                               wake_up_process(t);
+               }
        }
        rnp = rcu_get_root(rcu_state);
        (void)rcu_spawn_one_node_kthread(rcu_state, rnp);
+       if (rnp->node_kthread_task)
+               wake_up_process(rnp->node_kthread_task);
        if (NUM_RCU_NODES > 1) {
-               rcu_for_each_leaf_node(rcu_state, rnp)
+               rcu_for_each_leaf_node(rcu_state, rnp) {
                        (void)rcu_spawn_one_node_kthread(rcu_state, rnp);
+                       t = rnp->node_kthread_task;
+                       if (t)
+                               wake_up_process(t);
+                       rcu_wake_one_boost_kthread(rnp);
+               }
        }
        return 0;
 }
@@ -2188,14 +2200,14 @@ rcu_init_percpu_data(int cpu, struct rcu_state *rsp, int preemptible)
        raw_spin_unlock_irqrestore(&rsp->onofflock, flags);
 }
 
-static void __cpuinit rcu_online_cpu(int cpu)
+static void __cpuinit rcu_prepare_cpu(int cpu)
 {
        rcu_init_percpu_data(cpu, &rcu_sched_state, 0);
        rcu_init_percpu_data(cpu, &rcu_bh_state, 0);
        rcu_preempt_init_percpu_data(cpu);
 }
 
-static void __cpuinit rcu_online_kthreads(int cpu)
+static void __cpuinit rcu_prepare_kthreads(int cpu)
 {
        struct rcu_data *rdp = per_cpu_ptr(rcu_state->rda, cpu);
        struct rcu_node *rnp = rdp->mynode;
@@ -2208,6 +2220,31 @@ static void __cpuinit rcu_online_kthreads(int cpu)
        }
 }
 
+/*
+ * kthread_create() creates threads in TASK_UNINTERRUPTIBLE state,
+ * but the RCU threads are woken on demand, and if demand is low this
+ * could be a while triggering the hung task watchdog.
+ *
+ * In order to avoid this, poke all tasks once the CPU is fully
+ * up and running.
+ */
+static void __cpuinit rcu_online_kthreads(int cpu)
+{
+       struct rcu_data *rdp = per_cpu_ptr(rcu_state->rda, cpu);
+       struct rcu_node *rnp = rdp->mynode;
+       struct task_struct *t;
+
+       t = per_cpu(rcu_cpu_kthread_task, cpu);
+       if (t)
+               wake_up_process(t);
+
+       t = rnp->node_kthread_task;
+       if (t)
+               wake_up_process(t);
+
+       rcu_wake_one_boost_kthread(rnp);
+}
+
 /*
  * Handle CPU online/offline notification events.
  */
@@ -2221,10 +2258,11 @@ static int __cpuinit rcu_cpu_notify(struct notifier_block *self,
        switch (action) {
        case CPU_UP_PREPARE:
        case CPU_UP_PREPARE_FROZEN:
-               rcu_online_cpu(cpu);
-               rcu_online_kthreads(cpu);
+               rcu_prepare_cpu(cpu);
+               rcu_prepare_kthreads(cpu);
                break;
        case CPU_ONLINE:
+               rcu_online_kthreads(cpu);
        case CPU_DOWN_FAILED:
                rcu_node_kthread_setaffinity(rnp, -1);
                rcu_cpu_kthread_setrt(cpu, 1);

diff --git a/kernel/rcutree_plugin.h b/kernel/rcutree_plugin.h
index a767b7dac36517b389d2953036fc6097bcfcae96..c8bff3099a89eeeccf9e3d330a16f6c4d9a2c340 100644 (file)
--- a/kernel/rcutree_plugin.h
+++ b/kernel/rcutree_plugin.h
@@ -1295,7 +1295,6 @@ static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
        if (IS_ERR(t))
                return PTR_ERR(t);
        raw_spin_lock_irqsave(&rnp->lock, flags);
-       set_task_state(t, TASK_INTERRUPTIBLE);
        rnp->boost_kthread_task = t;
        raw_spin_unlock_irqrestore(&rnp->lock, flags);
        sp.sched_priority = RCU_KTHREAD_PRIO;
@@ -1303,6 +1302,12 @@ static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
        return 0;
 }
 
+static void __cpuinit rcu_wake_one_boost_kthread(struct rcu_node *rnp)
+{
+       if (rnp->boost_kthread_task)
+               wake_up_process(rnp->boost_kthread_task);
+}
+
 #else /* #ifdef CONFIG_RCU_BOOST */
 
 static void rcu_initiate_boost(struct rcu_node *rnp, unsigned long flags)
@@ -1326,6 +1331,10 @@ static int __cpuinit rcu_spawn_one_boost_kthread(struct rcu_state *rsp,
        return 0;
 }
 
+static void __cpuinit rcu_wake_one_boost_kthread(struct rcu_node *rnp)
+{
+}
+
 #endif /* #else #ifdef CONFIG_RCU_BOOST */
 
 #ifndef CONFIG_SMP