Merge branch 'akpm' (final batch from Andrew)

Merge third patch-bumb from Andrew Morton:
 "This wraps me up for -rc1.
   - Lots of misc stuff and things which were deferred/missed from
     patchbombings 1 & 2.
   - ocfs2 things
   - lib/scatterlist
   - hfsplus
   - fatfs
   - documentation
   - signals
   - procfs
   - lockdep
   - coredump
   - seqfile core
   - kexec
   - Tejun's large IDR tree reworkings
   - ipmi
   - partitions
   - nbd
   - random() things
   - kfifo
   - tools/testing/selftests updates
   - Sasha's large and pointless hlist cleanup"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (163 commits)
  hlist: drop the node parameter from iterators
  kcmp: make it depend on CHECKPOINT_RESTORE
  selftests: add a simple doc
  tools/testing/selftests/Makefile: rearrange targets
  selftests/efivarfs: add create-read test
  selftests/efivarfs: add empty file creation test
  selftests: add tests for efivarfs
  kfifo: fix kfifo_alloc() and kfifo_init()
  kfifo: move kfifo.c from kernel/ to lib/
  arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUS
  w1: add support for DS2413 Dual Channel Addressable Switch
  memstick: move the dereference below the NULL test
  drivers/pps/clients/pps-gpio.c: use devm_kzalloc
  Documentation/DMA-API-HOWTO.txt: fix typo
  include/linux/eventfd.h: fix incorrect filename is a comment
  mtd: mtd_stresstest: use prandom_bytes()
  mtd: mtd_subpagetest: convert to use prandom library
  mtd: mtd_speedtest: use prandom_bytes
  mtd: mtd_pagetest: convert to use prandom library
  mtd: mtd_oobtest: convert to use prandom library
  ...

kernel/Makefile

@@ -7,7 +7,7 @@ obj-y     = fork.o exec_domain.o panic.o printk.o \
 	    sysctl.o sysctl_binary.o capability.o ptrace.o timer.o user.o \
 	    signal.o sys.o kmod.o workqueue.o pid.o task_work.o \
 	    rcupdate.o extable.o params.o posix-timers.o \
-	    kthread.o wait.o kfifo.o sys_ni.o posix-cpu-timers.o mutex.o \
+	    kthread.o wait.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 smpboot.o
@@ -25,9 +25,7 @@ endif
 obj-y += sched/
 obj-y += power/
 
-ifeq ($(CONFIG_CHECKPOINT_RESTORE),y)
-obj-$(CONFIG_X86) += kcmp.o
-endif
+obj-$(CONFIG_CHECKPOINT_RESTORE) += kcmp.o
 obj-$(CONFIG_FREEZER) += freezer.o
 obj-$(CONFIG_PROFILING) += profile.o
 obj-$(CONFIG_STACKTRACE) += stacktrace.o

kernel/cgroup.c

@@ -554,7 +554,6 @@ static struct css_set *find_existing_css_set(
 {
 	int i;
 	struct cgroupfs_root *root = cgrp->root;
-	struct hlist_node *node;
 	struct css_set *cg;
 	unsigned long key;
 
@@ -577,7 +576,7 @@ static struct css_set *find_existing_css_set(
 	}
 
 	key = css_set_hash(template);
-	hash_for_each_possible(css_set_table, cg, node, hlist, key) {
+	hash_for_each_possible(css_set_table, cg, hlist, key) {
 		if (!compare_css_sets(cg, oldcg, cgrp, template))
 			continue;
 
@@ -1611,7 +1610,6 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
 		struct cgroupfs_root *existing_root;
 		const struct cred *cred;
 		int i;
-		struct hlist_node *node;
 		struct css_set *cg;
 
 		BUG_ON(sb->s_root != NULL);
@@ -1666,7 +1664,7 @@ static struct dentry *cgroup_mount(struct file_system_type *fs_type,
 		/* Link the top cgroup in this hierarchy into all
 		 * the css_set objects */
 		write_lock(&css_set_lock);
-		hash_for_each(css_set_table, i, node, cg, hlist)
+		hash_for_each(css_set_table, i, cg, hlist)
 			link_css_set(&tmp_cg_links, cg, root_cgrp);
 		write_unlock(&css_set_lock);
 
@@ -4493,7 +4491,7 @@ int __init_or_module cgroup_load_subsys(struct cgroup_subsys *ss)
 {
 	struct cgroup_subsys_state *css;
 	int i, ret;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	struct css_set *cg;
 	unsigned long key;
 
@@ -4561,7 +4559,7 @@ int __init_or_module cgroup_load_subsys(struct cgroup_subsys *ss)
 	 * this is all done under the css_set_lock.
 	 */
 	write_lock(&css_set_lock);
-	hash_for_each_safe(css_set_table, i, node, tmp, cg, hlist) {
+	hash_for_each_safe(css_set_table, i, tmp, cg, hlist) {
 		/* skip entries that we already rehashed */
 		if (cg->subsys[ss->subsys_id])
 			continue;
@@ -4571,7 +4569,7 @@ int __init_or_module cgroup_load_subsys(struct cgroup_subsys *ss)
 		cg->subsys[ss->subsys_id] = css;
 		/* recompute hash and restore entry */
 		key = css_set_hash(cg->subsys);
-		hash_add(css_set_table, node, key);
+		hash_add(css_set_table, &cg->hlist, key);
 	}
 	write_unlock(&css_set_lock);
 
@@ -4618,10 +4616,8 @@ void cgroup_unload_subsys(struct cgroup_subsys *ss)
 	offline_css(ss, dummytop);
 	ss->active = 0;
 
-	if (ss->use_id) {
-		idr_remove_all(&ss->idr);
+	if (ss->use_id)
 		idr_destroy(&ss->idr);
-	}
 
 	/* deassign the subsys_id */
 	subsys[ss->subsys_id] = NULL;
@@ -5322,7 +5318,7 @@ EXPORT_SYMBOL_GPL(free_css_id);
 static struct css_id *get_new_cssid(struct cgroup_subsys *ss, int depth)
 {
 	struct css_id *newid;
-	int myid, error, size;
+	int ret, size;
 
 	BUG_ON(!ss->use_id);
 
@@ -5330,35 +5326,24 @@ static struct css_id *get_new_cssid(struct cgroup_subsys *ss, int depth)
 	newid = kzalloc(size, GFP_KERNEL);
 	if (!newid)
 		return ERR_PTR(-ENOMEM);
-	/* get id */
-	if (unlikely(!idr_pre_get(&ss->idr, GFP_KERNEL))) {
-		error = -ENOMEM;
-		goto err_out;
-	}
+
+	idr_preload(GFP_KERNEL);
 	spin_lock(&ss->id_lock);
 	/* Don't use 0. allocates an ID of 1-65535 */
-	error = idr_get_new_above(&ss->idr, newid, 1, &myid);
+	ret = idr_alloc(&ss->idr, newid, 1, CSS_ID_MAX + 1, GFP_NOWAIT);
 	spin_unlock(&ss->id_lock);
+	idr_preload_end();
 
 	/* Returns error when there are no free spaces for new ID.*/
-	if (error) {
-		error = -ENOSPC;
+	if (ret < 0)
 		goto err_out;
-	}
-	if (myid > CSS_ID_MAX)
-		goto remove_idr;
 
-	newid->id = myid;
+	newid->id = ret;
 	newid->depth = depth;
 	return newid;
-remove_idr:
-	error = -ENOSPC;
-	spin_lock(&ss->id_lock);
-	idr_remove(&ss->idr, myid);
-	spin_unlock(&ss->id_lock);
 err_out:
 	kfree(newid);
-	return ERR_PTR(error);
+	return ERR_PTR(ret);
 
 }
 

kernel/events/core.c

@@ -5126,7 +5126,6 @@ static void do_perf_sw_event(enum perf_type_id type, u32 event_id,
 {
 	struct swevent_htable *swhash = &__get_cpu_var(swevent_htable);
 	struct perf_event *event;
-	struct hlist_node *node;
 	struct hlist_head *head;
 
 	rcu_read_lock();
@@ -5134,7 +5133,7 @@ static void do_perf_sw_event(enum perf_type_id type, u32 event_id,
 	if (!head)
 		goto end;
 
-	hlist_for_each_entry_rcu(event, node, head, hlist_entry) {
+	hlist_for_each_entry_rcu(event, head, hlist_entry) {
 		if (perf_swevent_match(event, type, event_id, data, regs))
 			perf_swevent_event(event, nr, data, regs);
 	}
@@ -5419,7 +5418,6 @@ void perf_tp_event(u64 addr, u64 count, void *record, int entry_size,
 {
 	struct perf_sample_data data;
 	struct perf_event *event;
-	struct hlist_node *node;
 
 	struct perf_raw_record raw = {
 		.size = entry_size,
@@ -5429,7 +5427,7 @@ void perf_tp_event(u64 addr, u64 count, void *record, int entry_size,
 	perf_sample_data_init(&data, addr, 0);
 	data.raw = &raw;
 
-	hlist_for_each_entry_rcu(event, node, head, hlist_entry) {
+	hlist_for_each_entry_rcu(event, head, hlist_entry) {
 		if (perf_tp_event_match(event, &data, regs))
 			perf_swevent_event(event, count, &data, regs);
 	}
@@ -5965,13 +5963,9 @@ int perf_pmu_register(struct pmu *pmu, char *name, int type)
 	pmu->name = name;
 
 	if (type < 0) {
-		int err = idr_pre_get(&pmu_idr, GFP_KERNEL);
-		if (!err)
-			goto free_pdc;
-
-		err = idr_get_new_above(&pmu_idr, pmu, PERF_TYPE_MAX, &type);
-		if (err) {
-			ret = err;
+		type = idr_alloc(&pmu_idr, pmu, PERF_TYPE_MAX, 0, GFP_KERNEL);
+		if (type < 0) {
+			ret = type;
 			goto free_pdc;
 		}
 	}

kernel/exit.c

@@ -20,6 +20,7 @@
 #include <linux/tsacct_kern.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
+#include <linux/freezer.h>
 #include <linux/binfmts.h>
 #include <linux/nsproxy.h>
 #include <linux/pid_namespace.h>
@@ -31,7 +32,6 @@
 #include <linux/mempolicy.h>
 #include <linux/taskstats_kern.h>
 #include <linux/delayacct.h>
-#include <linux/freezer.h>
 #include <linux/cgroup.h>
 #include <linux/syscalls.h>
 #include <linux/signal.h>
@@ -485,7 +485,7 @@ static void exit_mm(struct task_struct * tsk)
 			set_task_state(tsk, TASK_UNINTERRUPTIBLE);
 			if (!self.task) /* see coredump_finish() */
 				break;
-			schedule();
+			freezable_schedule();
 		}
 		__set_task_state(tsk, TASK_RUNNING);
 		down_read(&mm->mmap_sem);
@@ -835,7 +835,7 @@ void do_exit(long code)
 	/*
 	 * Make sure we are holding no locks:
 	 */
-	debug_check_no_locks_held(tsk);
+	debug_check_no_locks_held();
 	/*
 	 * We can do this unlocked here. The futex code uses this flag
 	 * just to verify whether the pi state cleanup has been done

kernel/fork.c

@@ -1861,10 +1861,8 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 			exit_sem(current);
 		}
 
-		if (new_nsproxy) {
+		if (new_nsproxy)
 			switch_task_namespaces(current, new_nsproxy);
-			new_nsproxy = NULL;
-		}
 
 		task_lock(current);
 
@@ -1894,9 +1892,6 @@ SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)
 		}
 	}
 
-	if (new_nsproxy)
-		put_nsproxy(new_nsproxy);
-
 bad_unshare_cleanup_cred:
 	if (new_cred)
 		put_cred(new_cred);

kernel/kexec.c

@@ -229,6 +229,8 @@ out:
 
 }
 
+static void kimage_free_page_list(struct list_head *list);
+
 static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry,
 				unsigned long nr_segments,
 				struct kexec_segment __user *segments)
@@ -242,8 +244,6 @@ static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry,
 	if (result)
 		goto out;
 
-	*rimage = image;
-
 	/*
 	 * Find a location for the control code buffer, and add it
 	 * the vector of segments so that it's pages will also be
@@ -254,22 +254,22 @@ static int kimage_normal_alloc(struct kimage **rimage, unsigned long entry,
 					   get_order(KEXEC_CONTROL_PAGE_SIZE));
 	if (!image->control_code_page) {
 		printk(KERN_ERR "Could not allocate control_code_buffer\n");
-		goto out;
+		goto out_free;
 	}
 
 	image->swap_page = kimage_alloc_control_pages(image, 0);
 	if (!image->swap_page) {
 		printk(KERN_ERR "Could not allocate swap buffer\n");
-		goto out;
+		goto out_free;
 	}
 
-	result = 0;
- out:
-	if (result == 0)
-		*rimage = image;
-	else
-		kfree(image);
+	*rimage = image;
+	return 0;
 
+out_free:
+	kimage_free_page_list(&image->control_pages);
+	kfree(image);
+out:
 	return result;
 }
 
@@ -316,7 +316,7 @@ static int kimage_crash_alloc(struct kimage **rimage, unsigned long entry,
 		mend = mstart + image->segment[i].memsz - 1;
 		/* Ensure we are within the crash kernel limits */
 		if ((mstart < crashk_res.start) || (mend > crashk_res.end))
-			goto out;
+			goto out_free;
 	}
 
 	/*
@@ -329,16 +329,15 @@ static int kimage_crash_alloc(struct kimage **rimage, unsigned long entry,
 					   get_order(KEXEC_CONTROL_PAGE_SIZE));
 	if (!image->control_code_page) {
 		printk(KERN_ERR "Could not allocate control_code_buffer\n");
-		goto out;
+		goto out_free;
 	}
 
-	result = 0;
-out:
-	if (result == 0)
-		*rimage = image;
-	else
-		kfree(image);
+	*rimage = image;
+	return 0;
 
+out_free:
+	kfree(image);
+out:
 	return result;
 }
 
@@ -503,8 +502,6 @@ static struct page *kimage_alloc_crash_control_pages(struct kimage *image,
 
 		if (hole_end > KEXEC_CRASH_CONTROL_MEMORY_LIMIT)
 			break;
-		if (hole_end > crashk_res.end)
-			break;
 		/* See if I overlap any of the segments */
 		for (i = 0; i < image->nr_segments; i++) {
 			unsigned long mstart, mend;
@@ -1514,6 +1511,8 @@ static int __init crash_save_vmcoreinfo_init(void)
 	VMCOREINFO_OFFSET(page, _count);
 	VMCOREINFO_OFFSET(page, mapping);
 	VMCOREINFO_OFFSET(page, lru);
+	VMCOREINFO_OFFSET(page, _mapcount);
+	VMCOREINFO_OFFSET(page, private);
 	VMCOREINFO_OFFSET(pglist_data, node_zones);
 	VMCOREINFO_OFFSET(pglist_data, nr_zones);
 #ifdef CONFIG_FLAT_NODE_MEM_MAP
@@ -1536,6 +1535,11 @@ static int __init crash_save_vmcoreinfo_init(void)
 	VMCOREINFO_NUMBER(PG_lru);
 	VMCOREINFO_NUMBER(PG_private);
 	VMCOREINFO_NUMBER(PG_swapcache);
+	VMCOREINFO_NUMBER(PG_slab);
+#ifdef CONFIG_MEMORY_FAILURE
+	VMCOREINFO_NUMBER(PG_hwpoison);
+#endif
+	VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
 
 	arch_crash_save_vmcoreinfo();
 	update_vmcoreinfo_note();

kernel/kprobes.c

@@ -334,11 +334,10 @@ static inline void reset_kprobe_instance(void)
 struct kprobe __kprobes *get_kprobe(void *addr)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 
 	head = &kprobe_table[hash_ptr(addr, KPROBE_HASH_BITS)];
-	hlist_for_each_entry_rcu(p, node, head, hlist) {
+	hlist_for_each_entry_rcu(p, head, hlist) {
 		if (p->addr == addr)
 			return p;
 	}
@@ -799,7 +798,6 @@ out:
 static void __kprobes optimize_all_kprobes(void)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 	unsigned int i;
 
@@ -810,7 +808,7 @@ static void __kprobes optimize_all_kprobes(void)
 	kprobes_allow_optimization = true;
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry_rcu(p, node, head, hlist)
+		hlist_for_each_entry_rcu(p, head, hlist)
 			if (!kprobe_disabled(p))
 				optimize_kprobe(p);
 	}
@@ -821,7 +819,6 @@ static void __kprobes optimize_all_kprobes(void)
 static void __kprobes unoptimize_all_kprobes(void)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 	unsigned int i;
 
@@ -832,7 +829,7 @@ static void __kprobes unoptimize_all_kprobes(void)
 	kprobes_allow_optimization = false;
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry_rcu(p, node, head, hlist) {
+		hlist_for_each_entry_rcu(p, head, hlist) {
 			if (!kprobe_disabled(p))
 				unoptimize_kprobe(p, false);
 		}
@@ -1148,7 +1145,7 @@ void __kprobes kprobe_flush_task(struct task_struct *tk)
 {
 	struct kretprobe_instance *ri;
 	struct hlist_head *head, empty_rp;
-	struct hlist_node *node, *tmp;
+	struct hlist_node *tmp;
 	unsigned long hash, flags = 0;
 
 	if (unlikely(!kprobes_initialized))
@@ -1159,12 +1156,12 @@ void __kprobes kprobe_flush_task(struct task_struct *tk)
 	hash = hash_ptr(tk, KPROBE_HASH_BITS);
 	head = &kretprobe_inst_table[hash];
 	kretprobe_table_lock(hash, &flags);
-	hlist_for_each_entry_safe(ri, node, tmp, head, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, head, hlist) {
 		if (ri->task == tk)
 			recycle_rp_inst(ri, &empty_rp);
 	}
 	kretprobe_table_unlock(hash, &flags);
-	hlist_for_each_entry_safe(ri, node, tmp, &empty_rp, hlist) {
+	hlist_for_each_entry_safe(ri, tmp, &empty_rp, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
@@ -1173,9 +1170,9 @@ void __kprobes kprobe_flush_task(struct task_struct *tk)
 static inline void free_rp_inst(struct kretprobe *rp)
 {
 	struct kretprobe_instance *ri;
-	struct hlist_node *pos, *next;
+	struct hlist_node *next;
 
-	hlist_for_each_entry_safe(ri, pos, next, &rp->free_instances, hlist) {
+	hlist_for_each_entry_safe(ri, next, &rp->free_instances, hlist) {
 		hlist_del(&ri->hlist);
 		kfree(ri);
 	}
@@ -1185,14 +1182,14 @@ static void __kprobes cleanup_rp_inst(struct kretprobe *rp)
 {
 	unsigned long flags, hash;
 	struct kretprobe_instance *ri;
-	struct hlist_node *pos, *next;
+	struct hlist_node *next;
 	struct hlist_head *head;
 
 	/* No race here */
 	for (hash = 0; hash < KPROBE_TABLE_SIZE; hash++) {
 		kretprobe_table_lock(hash, &flags);
 		head = &kretprobe_inst_table[hash];
-		hlist_for_each_entry_safe(ri, pos, next, head, hlist) {
+		hlist_for_each_entry_safe(ri, next, head, hlist) {
 			if (ri->rp == rp)
 				ri->rp = NULL;
 		}
@@ -2028,7 +2025,6 @@ static int __kprobes kprobes_module_callback(struct notifier_block *nb,
 {
 	struct module *mod = data;
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 	unsigned int i;
 	int checkcore = (val == MODULE_STATE_GOING);
@@ -2045,7 +2041,7 @@ static int __kprobes kprobes_module_callback(struct notifier_block *nb,
 	mutex_lock(&kprobe_mutex);
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry_rcu(p, node, head, hlist)
+		hlist_for_each_entry_rcu(p, head, hlist)
 			if (within_module_init((unsigned long)p->addr, mod) ||
 			    (checkcore &&
 			     within_module_core((unsigned long)p->addr, mod))) {
@@ -2192,7 +2188,6 @@ static void __kprobes kprobe_seq_stop(struct seq_file *f, void *v)
 static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p, *kp;
 	const char *sym = NULL;
 	unsigned int i = *(loff_t *) v;
@@ -2201,7 +2196,7 @@ static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v)
 
 	head = &kprobe_table[i];
 	preempt_disable();
-	hlist_for_each_entry_rcu(p, node, head, hlist) {
+	hlist_for_each_entry_rcu(p, head, hlist) {
 		sym = kallsyms_lookup((unsigned long)p->addr, NULL,
 					&offset, &modname, namebuf);
 		if (kprobe_aggrprobe(p)) {
@@ -2236,7 +2231,6 @@ static const struct file_operations debugfs_kprobes_operations = {
 static void __kprobes arm_all_kprobes(void)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 	unsigned int i;
 
@@ -2249,7 +2243,7 @@ static void __kprobes arm_all_kprobes(void)
 	/* Arming kprobes doesn't optimize kprobe itself */
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry_rcu(p, node, head, hlist)
+		hlist_for_each_entry_rcu(p, head, hlist)
 			if (!kprobe_disabled(p))
 				arm_kprobe(p);
 	}
@@ -2265,7 +2259,6 @@ already_enabled:
 static void __kprobes disarm_all_kprobes(void)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct kprobe *p;
 	unsigned int i;
 
@@ -2282,7 +2275,7 @@ static void __kprobes disarm_all_kprobes(void)
 
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry_rcu(p, node, head, hlist) {
+		hlist_for_each_entry_rcu(p, head, hlist) {
 			if (!arch_trampoline_kprobe(p) && !kprobe_disabled(p))
 				disarm_kprobe(p, false);
 		}

kernel/lockdep.c

@@ -4088,7 +4088,7 @@ void debug_check_no_locks_freed(const void *mem_from, unsigned long mem_len)
 }
 EXPORT_SYMBOL_GPL(debug_check_no_locks_freed);
 
-static void print_held_locks_bug(struct task_struct *curr)
+static void print_held_locks_bug(void)
 {
 	if (!debug_locks_off())
 		return;
@@ -4097,22 +4097,21 @@ static void print_held_locks_bug(struct task_struct *curr)
 
 	printk("\n");
 	printk("=====================================\n");
-	printk("[ BUG: lock held at task exit time! ]\n");
+	printk("[ BUG: %s/%d still has locks held! ]\n",
+	       current->comm, task_pid_nr(current));
 	print_kernel_ident();
 	printk("-------------------------------------\n");
-	printk("%s/%d is exiting with locks still held!\n",
-		curr->comm, task_pid_nr(curr));
-	lockdep_print_held_locks(curr);
-
+	lockdep_print_held_locks(current);
 	printk("\nstack backtrace:\n");
 	dump_stack();
 }
 
-void debug_check_no_locks_held(struct task_struct *task)
+void debug_check_no_locks_held(void)
 {
-	if (unlikely(task->lockdep_depth > 0))
-		print_held_locks_bug(task);
+	if (unlikely(current->lockdep_depth > 0))
+		print_held_locks_bug();
 }
+EXPORT_SYMBOL_GPL(debug_check_no_locks_held);
 
 void debug_show_all_locks(void)
 {

kernel/pid.c

@@ -350,10 +350,9 @@ void disable_pid_allocation(struct pid_namespace *ns)
 
 struct pid *find_pid_ns(int nr, struct pid_namespace *ns)
 {
-	struct hlist_node *elem;
 	struct upid *pnr;
 
-	hlist_for_each_entry_rcu(pnr, elem,
+	hlist_for_each_entry_rcu(pnr,
 			&pid_hash[pid_hashfn(nr, ns)], pid_chain)
 		if (pnr->nr == nr && pnr->ns == ns)
 			return container_of(pnr, struct pid,

kernel/posix-timers.c

@@ -552,24 +552,22 @@ SYSCALL_DEFINE3(timer_create, const clockid_t, which_clock,
 		return -EAGAIN;
 
 	spin_lock_init(&new_timer->it_lock);
- retry:
-	if (unlikely(!idr_pre_get(&posix_timers_id, GFP_KERNEL))) {
-		error = -EAGAIN;
-		goto out;
-	}
+
+	idr_preload(GFP_KERNEL);
 	spin_lock_irq(&idr_lock);
-	error = idr_get_new(&posix_timers_id, new_timer, &new_timer_id);
+	error = idr_alloc(&posix_timers_id, new_timer, 0, 0, GFP_NOWAIT);
 	spin_unlock_irq(&idr_lock);
-	if (error) {
-		if (error == -EAGAIN)
-			goto retry;
+	idr_preload_end();
+	if (error < 0) {
 		/*
 		 * Weird looking, but we return EAGAIN if the IDR is
 		 * full (proper POSIX return value for this)
 		 */
-		error = -EAGAIN;
+		if (error == -ENOSPC)
+			error = -EAGAIN;
 		goto out;
 	}
+	new_timer_id = error;
 
 	it_id_set = IT_ID_SET;
 	new_timer->it_id = (timer_t) new_timer_id;

kernel/sched/core.c

@@ -1752,9 +1752,8 @@ EXPORT_SYMBOL_GPL(preempt_notifier_unregister);
 static void fire_sched_in_preempt_notifiers(struct task_struct *curr)
 {
 	struct preempt_notifier *notifier;
-	struct hlist_node *node;
 
-	hlist_for_each_entry(notifier, node, &curr->preempt_notifiers, link)
+	hlist_for_each_entry(notifier, &curr->preempt_notifiers, link)
 		notifier->ops->sched_in(notifier, raw_smp_processor_id());
 }
 
@@ -1763,9 +1762,8 @@ fire_sched_out_preempt_notifiers(struct task_struct *curr,
 				 struct task_struct *next)
 {
 	struct preempt_notifier *notifier;
-	struct hlist_node *node;
 
-	hlist_for_each_entry(notifier, node, &curr->preempt_notifiers, link)
+	hlist_for_each_entry(notifier, &curr->preempt_notifiers, link)
 		notifier->ops->sched_out(notifier, next);
 }
 

kernel/signal.c

@@ -1157,11 +1157,11 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t,
 static void print_fatal_signal(int signr)
 {
 	struct pt_regs *regs = signal_pt_regs();
-	printk("%s/%d: potentially unexpected fatal signal %d.\n",
+	printk(KERN_INFO "%s/%d: potentially unexpected fatal signal %d.\n",
 		current->comm, task_pid_nr(current), signr);
 
 #if defined(__i386__) && !defined(__arch_um__)
-	printk("code at %08lx: ", regs->ip);
+	printk(KERN_INFO "code at %08lx: ", regs->ip);
 	{
 		int i;
 		for (i = 0; i < 16; i++) {
@@ -1169,11 +1169,11 @@ static void print_fatal_signal(int signr)
 
 			if (get_user(insn, (unsigned char *)(regs->ip + i)))
 				break;
-			printk("%02x ", insn);
+			printk(KERN_CONT "%02x ", insn);
 		}
 	}
+	printk(KERN_CONT "\n");
 #endif
-	printk("\n");
 	preempt_disable();
 	show_regs(regs);
 	preempt_enable();
@@ -2996,7 +2996,8 @@ static int do_rt_sigqueueinfo(pid_t pid, int sig, siginfo_t *info)
 	/* Not even root can pretend to send signals from the kernel.
 	 * Nor can they impersonate a kill()/tgkill(), which adds source info.
 	 */
-	if (info->si_code >= 0 || info->si_code == SI_TKILL) {
+	if ((info->si_code >= 0 || info->si_code == SI_TKILL) &&
+	    (task_pid_vnr(current) != pid)) {
 		/* We used to allow any < 0 si_code */
 		WARN_ON_ONCE(info->si_code < 0);
 		return -EPERM;
@@ -3045,7 +3046,8 @@ static int do_rt_tgsigqueueinfo(pid_t tgid, pid_t pid, int sig, siginfo_t *info)
 	/* Not even root can pretend to send signals from the kernel.
 	 * Nor can they impersonate a kill()/tgkill(), which adds source info.
 	 */
-	if (info->si_code >= 0 || info->si_code == SI_TKILL) {
+	if (((info->si_code >= 0 || info->si_code == SI_TKILL)) &&
+	    (task_pid_vnr(current) != pid)) {
 		/* We used to allow any < 0 si_code */
 		WARN_ON_ONCE(info->si_code < 0);
 		return -EPERM;

kernel/smpboot.c

@@ -131,7 +131,7 @@ static int smpboot_thread_fn(void *data)
 			continue;
 		}
 
-		BUG_ON(td->cpu != smp_processor_id());
+		//BUG_ON(td->cpu != smp_processor_id());
 
 		/* Check for state change setup */
 		switch (td->status) {

kernel/sys.c

@@ -2185,11 +2185,6 @@ SYSCALL_DEFINE3(getcpu, unsigned __user *, cpup, unsigned __user *, nodep,
 
 char poweroff_cmd[POWEROFF_CMD_PATH_LEN] = "/sbin/poweroff";
 
-static void argv_cleanup(struct subprocess_info *info)
-{
-	argv_free(info->argv);
-}
-
 static int __orderly_poweroff(void)
 {
 	int argc;
@@ -2209,9 +2204,8 @@ static int __orderly_poweroff(void)
 	}
 
 	ret = call_usermodehelper_fns(argv[0], argv, envp, UMH_WAIT_EXEC,
-				      NULL, argv_cleanup, NULL);
-	if (ret == -ENOMEM)
-		argv_free(argv);
+				      NULL, NULL, NULL);
+	argv_free(argv);
 
 	return ret;
 }

kernel/sysctl.c

@@ -2095,7 +2095,7 @@ int proc_dointvec_minmax(struct ctl_table *table, int write,
 static void validate_coredump_safety(void)
 {
 #ifdef CONFIG_COREDUMP
-	if (suid_dumpable == SUID_DUMPABLE_SAFE &&
+	if (suid_dumpable == SUID_DUMP_ROOT &&
 	    core_pattern[0] != '/' && core_pattern[0] != '|') {
 		printk(KERN_WARNING "Unsafe core_pattern used with "\
 			"suid_dumpable=2. Pipe handler or fully qualified "\

kernel/sysctl_binary.c

@@ -1171,9 +1171,10 @@ static ssize_t bin_dn_node_address(struct file *file,
 
 		/* Convert the decnet address to binary */
 		result = -EIO;
-		nodep = strchr(buf, '.') + 1;
+		nodep = strchr(buf, '.');
 		if (!nodep)
 			goto out;
+		++nodep;
 
 		area = simple_strtoul(buf, NULL, 10);
 		node = simple_strtoul(nodep, NULL, 10);

kernel/trace/ftrace.c

@@ -762,7 +762,6 @@ ftrace_find_profiled_func(struct ftrace_profile_stat *stat, unsigned long ip)
 {
 	struct ftrace_profile *rec;
 	struct hlist_head *hhd;
-	struct hlist_node *n;
 	unsigned long key;
 
 	key = hash_long(ip, ftrace_profile_bits);
@@ -771,7 +770,7 @@ ftrace_find_profiled_func(struct ftrace_profile_stat *stat, unsigned long ip)
 	if (hlist_empty(hhd))
 		return NULL;
 
-	hlist_for_each_entry_rcu(rec, n, hhd, node) {
+	hlist_for_each_entry_rcu(rec, hhd, node) {
 		if (rec->ip == ip)
 			return rec;
 	}
@@ -1133,7 +1132,6 @@ ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip)
 	unsigned long key;
 	struct ftrace_func_entry *entry;
 	struct hlist_head *hhd;
-	struct hlist_node *n;
 
 	if (ftrace_hash_empty(hash))
 		return NULL;
@@ -1145,7 +1143,7 @@ ftrace_lookup_ip(struct ftrace_hash *hash, unsigned long ip)
 
 	hhd = &hash->buckets[key];
 
-	hlist_for_each_entry_rcu(entry, n, hhd, hlist) {
+	hlist_for_each_entry_rcu(entry, hhd, hlist) {
 		if (entry->ip == ip)
 			return entry;
 	}
@@ -1202,7 +1200,7 @@ remove_hash_entry(struct ftrace_hash *hash,
 static void ftrace_hash_clear(struct ftrace_hash *hash)
 {
 	struct hlist_head *hhd;
-	struct hlist_node *tp, *tn;
+	struct hlist_node *tn;
 	struct ftrace_func_entry *entry;
 	int size = 1 << hash->size_bits;
 	int i;
@@ -1212,7 +1210,7 @@ static void ftrace_hash_clear(struct ftrace_hash *hash)
 
 	for (i = 0; i < size; i++) {
 		hhd = &hash->buckets[i];
-		hlist_for_each_entry_safe(entry, tp, tn, hhd, hlist)
+		hlist_for_each_entry_safe(entry, tn, hhd, hlist)
 			free_hash_entry(hash, entry);
 	}
 	FTRACE_WARN_ON(hash->count);
@@ -1275,7 +1273,6 @@ alloc_and_copy_ftrace_hash(int size_bits, struct ftrace_hash *hash)
 {
 	struct ftrace_func_entry *entry;
 	struct ftrace_hash *new_hash;
-	struct hlist_node *tp;
 	int size;
 	int ret;
 	int i;
@@ -1290,7 +1287,7 @@ alloc_and_copy_ftrace_hash(int size_bits, struct ftrace_hash *hash)
 
 	size = 1 << hash->size_bits;
 	for (i = 0; i < size; i++) {
-		hlist_for_each_entry(entry, tp, &hash->buckets[i], hlist) {
+		hlist_for_each_entry(entry, &hash->buckets[i], hlist) {
 			ret = add_hash_entry(new_hash, entry->ip);
 			if (ret < 0)
 				goto free_hash;
@@ -1316,7 +1313,7 @@ ftrace_hash_move(struct ftrace_ops *ops, int enable,
 		 struct ftrace_hash **dst, struct ftrace_hash *src)
 {
 	struct ftrace_func_entry *entry;
-	struct hlist_node *tp, *tn;
+	struct hlist_node *tn;
 	struct hlist_head *hhd;
 	struct ftrace_hash *old_hash;
 	struct ftrace_hash *new_hash;
@@ -1362,7 +1359,7 @@ ftrace_hash_move(struct ftrace_ops *ops, int enable,
 	size = 1 << src->size_bits;
 	for (i = 0; i < size; i++) {
 		hhd = &src->buckets[i];
-		hlist_for_each_entry_safe(entry, tp, tn, hhd, hlist) {
+		hlist_for_each_entry_safe(entry, tn, hhd, hlist) {
 			if (bits > 0)
 				key = hash_long(entry->ip, bits);
 			else
@@ -2901,7 +2898,6 @@ static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip,
 {
 	struct ftrace_func_probe *entry;
 	struct hlist_head *hhd;
-	struct hlist_node *n;
 	unsigned long key;
 
 	key = hash_long(ip, FTRACE_HASH_BITS);
@@ -2917,7 +2913,7 @@ static void function_trace_probe_call(unsigned long ip, unsigned long parent_ip,
 	 * on the hash. rcu_read_lock is too dangerous here.
 	 */
 	preempt_disable_notrace();
-	hlist_for_each_entry_rcu(entry, n, hhd, node) {
+	hlist_for_each_entry_rcu(entry, hhd, node) {
 		if (entry->ip == ip)
 			entry->ops->func(ip, parent_ip, &entry->data);
 	}
@@ -3068,7 +3064,7 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 				  void *data, int flags)
 {
 	struct ftrace_func_probe *entry;
-	struct hlist_node *n, *tmp;
+	struct hlist_node *tmp;
 	char str[KSYM_SYMBOL_LEN];
 	int type = MATCH_FULL;
 	int i, len = 0;
@@ -3091,7 +3087,7 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
 	for (i = 0; i < FTRACE_FUNC_HASHSIZE; i++) {
 		struct hlist_head *hhd = &ftrace_func_hash[i];
 
-		hlist_for_each_entry_safe(entry, n, tmp, hhd, node) {
+		hlist_for_each_entry_safe(entry, tmp, hhd, node) {
 
 			/* break up if statements for readability */
 			if ((flags & PROBE_TEST_FUNC) && entry->ops != ops)

kernel/trace/trace_output.c

@@ -739,12 +739,11 @@ static int task_state_char(unsigned long state)
 struct trace_event *ftrace_find_event(int type)
 {
 	struct trace_event *event;
-	struct hlist_node *n;
 	unsigned key;
 
 	key = type & (EVENT_HASHSIZE - 1);
 
-	hlist_for_each_entry(event, n, &event_hash[key], node) {
+	hlist_for_each_entry(event, &event_hash[key], node) {
 		if (event->type == type)
 			return event;
 	}

kernel/tracepoint.c

@@ -192,12 +192,11 @@ tracepoint_entry_remove_probe(struct tracepoint_entry *entry,
 static struct tracepoint_entry *get_tracepoint(const char *name)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct tracepoint_entry *e;
 	u32 hash = jhash(name, strlen(name), 0);
 
 	head = &tracepoint_table[hash & (TRACEPOINT_TABLE_SIZE - 1)];
-	hlist_for_each_entry(e, node, head, hlist) {
+	hlist_for_each_entry(e, head, hlist) {
 		if (!strcmp(name, e->name))
 			return e;
 	}
@@ -211,13 +210,12 @@ static struct tracepoint_entry *get_tracepoint(const char *name)
 static struct tracepoint_entry *add_tracepoint(const char *name)
 {
 	struct hlist_head *head;
-	struct hlist_node *node;
 	struct tracepoint_entry *e;
 	size_t name_len = strlen(name) + 1;
 	u32 hash = jhash(name, name_len-1, 0);
 
 	head = &tracepoint_table[hash & (TRACEPOINT_TABLE_SIZE - 1)];
-	hlist_for_each_entry(e, node, head, hlist) {
+	hlist_for_each_entry(e, head, hlist) {
 		if (!strcmp(name, e->name)) {
 			printk(KERN_NOTICE
 				"tracepoint %s busy\n", name);