aboutsummaryrefslogtreecommitdiff
path: root/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'kernel')
-rw-r--r--kernel/audit.c32
-rw-r--r--kernel/auditsc.c24
-rw-r--r--kernel/cgroup.c10
-rw-r--r--kernel/fork.c16
-rw-r--r--kernel/irq/Makefile1
-rw-r--r--kernel/irq/autoprobe.c15
-rw-r--r--kernel/irq/chip.c15
-rw-r--r--kernel/irq/handle.c189
-rw-r--r--kernel/irq/internals.h5
-rw-r--r--kernel/irq/numa_migrate.c122
-rw-r--r--kernel/irq/proc.c6
-rw-r--r--kernel/irq/spurious.c5
-rw-r--r--kernel/latencytop.c2
-rw-r--r--kernel/posix-cpu-timers.c2
-rw-r--r--kernel/posix-timers.c6
-rw-r--r--kernel/power/swap.c2
-rw-r--r--kernel/relay.c7
-rw-r--r--kernel/sched.c2
-rw-r--r--kernel/sched_clock.c6
-rw-r--r--kernel/softlockup.c2
-rw-r--r--kernel/time/timekeeping.c22
21 files changed, 440 insertions, 51 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index 4414e93d875..ce6d8ea3131 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -61,8 +61,11 @@
#include "audit.h"
-/* No auditing will take place until audit_initialized != 0.
+/* No auditing will take place until audit_initialized == AUDIT_INITIALIZED.
* (Initialization happens after skb_init is called.) */
+#define AUDIT_DISABLED -1
+#define AUDIT_UNINITIALIZED 0
+#define AUDIT_INITIALIZED 1
static int audit_initialized;
#define AUDIT_OFF 0
@@ -965,6 +968,9 @@ static int __init audit_init(void)
{
int i;
+ if (audit_initialized == AUDIT_DISABLED)
+ return 0;
+
printk(KERN_INFO "audit: initializing netlink socket (%s)\n",
audit_default ? "enabled" : "disabled");
audit_sock = netlink_kernel_create(&init_net, NETLINK_AUDIT, 0,
@@ -976,7 +982,7 @@ static int __init audit_init(void)
skb_queue_head_init(&audit_skb_queue);
skb_queue_head_init(&audit_skb_hold_queue);
- audit_initialized = 1;
+ audit_initialized = AUDIT_INITIALIZED;
audit_enabled = audit_default;
audit_ever_enabled |= !!audit_default;
@@ -999,13 +1005,21 @@ __initcall(audit_init);
static int __init audit_enable(char *str)
{
audit_default = !!simple_strtol(str, NULL, 0);
- printk(KERN_INFO "audit: %s%s\n",
- audit_default ? "enabled" : "disabled",
- audit_initialized ? "" : " (after initialization)");
- if (audit_initialized) {
+ if (!audit_default)
+ audit_initialized = AUDIT_DISABLED;
+
+ printk(KERN_INFO "audit: %s", audit_default ? "enabled" : "disabled");
+
+ if (audit_initialized == AUDIT_INITIALIZED) {
audit_enabled = audit_default;
audit_ever_enabled |= !!audit_default;
+ } else if (audit_initialized == AUDIT_UNINITIALIZED) {
+ printk(" (after initialization)");
+ } else {
+ printk(" (until reboot)");
}
+ printk("\n");
+
return 1;
}
@@ -1107,9 +1121,7 @@ unsigned int audit_serial(void)
static inline void audit_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
- if (ctx)
- auditsc_get_stamp(ctx, t, serial);
- else {
+ if (!ctx || !auditsc_get_stamp(ctx, t, serial)) {
*t = CURRENT_TIME;
*serial = audit_serial();
}
@@ -1146,7 +1158,7 @@ struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
int reserve;
unsigned long timeout_start = jiffies;
- if (!audit_initialized)
+ if (audit_initialized != AUDIT_INITIALIZED)
return NULL;
if (unlikely(audit_filter_type(type)))
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index cf5bc2f5f9c..2a3f0afc4d2 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -1459,7 +1459,6 @@ void audit_free(struct task_struct *tsk)
/**
* audit_syscall_entry - fill in an audit record at syscall entry
- * @tsk: task being audited
* @arch: architecture type
* @major: major syscall type (function)
* @a1: additional syscall register 1
@@ -1548,9 +1547,25 @@ void audit_syscall_entry(int arch, int major,
context->ppid = 0;
}
+void audit_finish_fork(struct task_struct *child)
+{
+ struct audit_context *ctx = current->audit_context;
+ struct audit_context *p = child->audit_context;
+ if (!p || !ctx || !ctx->auditable)
+ return;
+ p->arch = ctx->arch;
+ p->major = ctx->major;
+ memcpy(p->argv, ctx->argv, sizeof(ctx->argv));
+ p->ctime = ctx->ctime;
+ p->dummy = ctx->dummy;
+ p->auditable = ctx->auditable;
+ p->in_syscall = ctx->in_syscall;
+ p->filterkey = kstrdup(ctx->filterkey, GFP_KERNEL);
+ p->ppid = current->pid;
+}
+
/**
* audit_syscall_exit - deallocate audit context after a system call
- * @tsk: task being audited
* @valid: success/failure flag
* @return_code: syscall return value
*
@@ -1942,15 +1957,18 @@ EXPORT_SYMBOL_GPL(__audit_inode_child);
*
* Also sets the context as auditable.
*/
-void auditsc_get_stamp(struct audit_context *ctx,
+int auditsc_get_stamp(struct audit_context *ctx,
struct timespec *t, unsigned int *serial)
{
+ if (!ctx->in_syscall)
+ return 0;
if (!ctx->serial)
ctx->serial = audit_serial();
t->tv_sec = ctx->ctime.tv_sec;
t->tv_nsec = ctx->ctime.tv_nsec;
*serial = ctx->serial;
ctx->auditable = 1;
+ return 1;
}
/* global counter which is incremented every time something logs in */
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index fe00b3b983a..2606d0fb4e5 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -702,7 +702,7 @@ static int rebind_subsystems(struct cgroupfs_root *root,
* any child cgroups exist. This is theoretically supportable
* but involves complex error handling, so it's being left until
* later */
- if (!list_empty(&cgrp->children))
+ if (root->number_of_cgroups > 1)
return -EBUSY;
/* Process each subsystem */
@@ -1024,7 +1024,7 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
if (ret == -EBUSY) {
mutex_unlock(&cgroup_mutex);
mutex_unlock(&inode->i_mutex);
- goto drop_new_super;
+ goto free_cg_links;
}
/* EBUSY should be the only error here */
@@ -1073,10 +1073,11 @@ static int cgroup_get_sb(struct file_system_type *fs_type,
return simple_set_mnt(mnt, sb);
+ free_cg_links:
+ free_cg_links(&tmp_cg_links);
drop_new_super:
up_write(&sb->s_umount);
deactivate_super(sb);
- free_cg_links(&tmp_cg_links);
return ret;
}
@@ -2934,9 +2935,6 @@ int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *subsys,
again:
root = subsys->root;
if (root == &rootnode) {
- printk(KERN_INFO
- "Not cloning cgroup for unused subsystem %s\n",
- subsys->name);
mutex_unlock(&cgroup_mutex);
return 0;
}
diff --git a/kernel/fork.c b/kernel/fork.c
index 2a372a0e206..495da2e9a8b 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -315,17 +315,20 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
file = tmp->vm_file;
if (file) {
struct inode *inode = file->f_path.dentry->d_inode;
+ struct address_space *mapping = file->f_mapping;
+
get_file(file);
if (tmp->vm_flags & VM_DENYWRITE)
atomic_dec(&inode->i_writecount);
-
- /* insert tmp into the share list, just after mpnt */
- spin_lock(&file->f_mapping->i_mmap_lock);
+ spin_lock(&mapping->i_mmap_lock);
+ if (tmp->vm_flags & VM_SHARED)
+ mapping->i_mmap_writable++;
tmp->vm_truncate_count = mpnt->vm_truncate_count;
- flush_dcache_mmap_lock(file->f_mapping);
+ flush_dcache_mmap_lock(mapping);
+ /* insert tmp into the share list, just after mpnt */
vma_prio_tree_add(tmp, mpnt);
- flush_dcache_mmap_unlock(file->f_mapping);
- spin_unlock(&file->f_mapping->i_mmap_lock);
+ flush_dcache_mmap_unlock(mapping);
+ spin_unlock(&mapping->i_mmap_lock);
}
/*
@@ -1398,6 +1401,7 @@ long do_fork(unsigned long clone_flags,
init_completion(&vfork);
}
+ audit_finish_fork(p);
tracehook_report_clone(trace, regs, clone_flags, nr, p);
/*
diff --git a/kernel/irq/Makefile b/kernel/irq/Makefile
index 681c52dbfe2..4dd5b1edac9 100644
--- a/kernel/irq/Makefile
+++ b/kernel/irq/Makefile
@@ -3,3 +3,4 @@ obj-y := handle.o manage.o spurious.o resend.o chip.o devres.o
obj-$(CONFIG_GENERIC_IRQ_PROBE) += autoprobe.o
obj-$(CONFIG_PROC_FS) += proc.o
obj-$(CONFIG_GENERIC_PENDING_IRQ) += migration.o
+obj-$(CONFIG_NUMA_MIGRATE_IRQ_DESC) += numa_migrate.o
diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
index cc0f7321b8c..650ce4102a6 100644
--- a/kernel/irq/autoprobe.c
+++ b/kernel/irq/autoprobe.c
@@ -40,6 +40,9 @@ unsigned long probe_irq_on(void)
* flush such a longstanding irq before considering it as spurious.
*/
for_each_irq_desc_reverse(i, desc) {
+ if (!desc)
+ continue;
+
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
/*
@@ -68,6 +71,9 @@ unsigned long probe_irq_on(void)
* happened in the previous stage, it may have masked itself)
*/
for_each_irq_desc_reverse(i, desc) {
+ if (!desc)
+ continue;
+
spin_lock_irq(&desc->lock);
if (!desc->action && !(desc->status & IRQ_NOPROBE)) {
desc->status |= IRQ_AUTODETECT | IRQ_WAITING;
@@ -86,6 +92,9 @@ unsigned long probe_irq_on(void)
* Now filter out any obviously spurious interrupts
*/
for_each_irq_desc(i, desc) {
+ if (!desc)
+ continue;
+
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -124,6 +133,9 @@ unsigned int probe_irq_mask(unsigned long val)
int i;
for_each_irq_desc(i, desc) {
+ if (!desc)
+ continue;
+
spin_lock_irq(&desc->lock);
status = desc->status;
@@ -166,6 +178,9 @@ int probe_irq_off(unsigned long val)
unsigned int status;
for_each_irq_desc(i, desc) {
+ if (!desc)
+ continue;
+
spin_lock_irq(&desc->lock);
status = desc->status;
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 7765d4c80c3..6eb3c7952b6 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -24,9 +24,10 @@
*/
void dynamic_irq_init(unsigned int irq)
{
- struct irq_desc *desc = irq_to_desc(irq);
+ struct irq_desc *desc;
unsigned long flags;
+ desc = irq_to_desc(irq);
if (!desc) {
WARN(1, KERN_ERR "Trying to initialize invalid IRQ%d\n", irq);
return;
@@ -353,6 +354,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
spin_lock(&desc->lock);
mask_ack_irq(desc, irq);
+ desc = irq_remap_to_desc(irq, desc);
if (unlikely(desc->status & IRQ_INPROGRESS))
goto out_unlock;
@@ -430,6 +432,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
desc->status &= ~IRQ_INPROGRESS;
out:
desc->chip->eoi(irq);
+ desc = irq_remap_to_desc(irq, desc);
spin_unlock(&desc->lock);
}
@@ -466,12 +469,14 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
!desc->action)) {
desc->status |= (IRQ_PENDING | IRQ_MASKED);
mask_ack_irq(desc, irq);
+ desc = irq_remap_to_desc(irq, desc);
goto out_unlock;
}
kstat_incr_irqs_this_cpu(irq, desc);
/* Start handling the irq */
desc->chip->ack(irq);
+ desc = irq_remap_to_desc(irq, desc);
/* Mark the IRQ currently in progress.*/
desc->status |= IRQ_INPROGRESS;
@@ -532,8 +537,10 @@ handle_percpu_irq(unsigned int irq, struct irq_desc *desc)
if (!noirqdebug)
note_interrupt(irq, desc, action_ret);
- if (desc->chip->eoi)
+ if (desc->chip->eoi) {
desc->chip->eoi(irq);
+ desc = irq_remap_to_desc(irq, desc);
+ }
}
void
@@ -568,8 +575,10 @@ __set_irq_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
/* Uninstall? */
if (handle == handle_bad_irq) {
- if (desc->chip != &no_irq_chip)
+ if (desc->chip != &no_irq_chip) {
mask_ack_irq(desc, irq);
+ desc = irq_remap_to_desc(irq, desc);
+ }
desc->status |= IRQ_DISABLED;
desc->depth = 1;
}
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index c815b42d0f5..6492400cb50 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -15,9 +15,16 @@
#include <linux/random.h>
#include <linux/interrupt.h>
#include <linux/kernel_stat.h>
+#include <linux/rculist.h>
+#include <linux/hash.h>
#include "internals.h"
+/*
+ * lockdep: we want to handle all irq_desc locks as a single lock-class:
+ */
+struct lock_class_key irq_desc_lock_class;
+
/**
* handle_bad_irq - handle spurious and unhandled irqs
* @irq: the interrupt number
@@ -49,6 +56,155 @@ void handle_bad_irq(unsigned int irq, struct irq_desc *desc)
int nr_irqs = NR_IRQS;
EXPORT_SYMBOL_GPL(nr_irqs);
+void __init __attribute__((weak)) arch_early_irq_init(void)
+{
+}
+
+#ifdef CONFIG_SPARSE_IRQ
+static struct irq_desc irq_desc_init = {
+ .irq = -1,
+ .status = IRQ_DISABLED,
+ .chip = &no_irq_chip,
+ .handle_irq = handle_bad_irq,
+ .depth = 1,
+ .lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
+#ifdef CONFIG_SMP
+ .affinity = CPU_MASK_ALL
+#endif
+};
+
+void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr)
+{
+ unsigned long bytes;
+ char *ptr;
+ int node;
+
+ /* Compute how many bytes we need per irq and allocate them */
+ bytes = nr * sizeof(unsigned int);
+
+ node = cpu_to_node(cpu);
+ ptr = kzalloc_node(bytes, GFP_ATOMIC, node);
+ printk(KERN_DEBUG " alloc kstat_irqs on cpu %d node %d\n", cpu, node);
+
+ if (ptr)
+ desc->kstat_irqs = (unsigned int *)ptr;
+}
+
+void __attribute__((weak)) arch_init_chip_data(struct irq_desc *desc, int cpu)
+{
+}
+
+static void init_one_irq_desc(int irq, struct irq_desc *desc, int cpu)
+{
+ memcpy(desc, &irq_desc_init, sizeof(struct irq_desc));
+ desc->irq = irq;
+#ifdef CONFIG_SMP
+ desc->cpu = cpu;
+#endif
+ lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+ init_kstat_irqs(desc, cpu, nr_cpu_ids);
+ if (!desc->kstat_irqs) {
+ printk(KERN_ERR "can not alloc kstat_irqs\n");
+ BUG_ON(1);
+ }
+ arch_init_chip_data(desc, cpu);
+}
+
+/*
+ * Protect the sparse_irqs:
+ */
+DEFINE_SPINLOCK(sparse_irq_lock);
+
+struct irq_desc *irq_desc_ptrs[NR_IRQS] __read_mostly;
+
+static struct irq_desc irq_desc_legacy[NR_IRQS_LEGACY] __cacheline_aligned_in_smp = {
+ [0 ... NR_IRQS_LEGACY-1] = {
+ .irq = -1,
+ .status = IRQ_DISABLED,
+ .chip = &no_irq_chip,
+ .handle_irq = handle_bad_irq,
+ .depth = 1,
+ .lock = __SPIN_LOCK_UNLOCKED(irq_desc_init.lock),
+#ifdef CONFIG_SMP
+ .affinity = CPU_MASK_ALL
+#endif
+ }
+};
+
+/* FIXME: use bootmem alloc ...*/
+static unsigned int kstat_irqs_legacy[NR_IRQS_LEGACY][NR_CPUS];
+
+void __init early_irq_init(void)
+{
+ struct irq_desc *desc;
+ int legacy_count;
+ int i;
+
+ desc = irq_desc_legacy;
+ legacy_count = ARRAY_SIZE(irq_desc_legacy);
+
+ for (i = 0; i < legacy_count; i++) {
+ desc[i].irq = i;
+ desc[i].kstat_irqs = kstat_irqs_legacy[i];
+
+ irq_desc_ptrs[i] = desc + i;
+ }
+
+ for (i = legacy_count; i < NR_IRQS; i++)
+ irq_desc_ptrs[i] = NULL;
+
+ arch_early_irq_init();
+}
+
+struct irq_desc *irq_to_desc(unsigned int irq)
+{
+ return (irq < NR_IRQS) ? irq_desc_ptrs[irq] : NULL;
+}
+
+struct irq_desc *irq_to_desc_alloc_cpu(unsigned int irq, int cpu)
+{
+ struct irq_desc *desc;
+ unsigned long flags;
+ int node;
+
+ if (irq >= NR_IRQS) {
+ printk(KERN_WARNING "irq >= NR_IRQS in irq_to_desc_alloc: %d %d\n",
+ irq, NR_IRQS);
+ WARN_ON(1);
+ return NULL;
+ }
+
+ desc = irq_desc_ptrs[irq];
+ if (desc)
+ return desc;
+
+ spin_lock_irqsave(&sparse_irq_lock, flags);
+
+ /* We have to check it to avoid races with another CPU */
+ desc = irq_desc_ptrs[irq];
+ if (desc)
+ goto out_unlock;
+
+ node = cpu_to_node(cpu);
+ desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
+ printk(KERN_DEBUG " alloc irq_desc for %d on cpu %d node %d\n",
+ irq, cpu, node);
+ if (!desc) {
+ printk(KERN_ERR "can not alloc irq_desc\n");
+ BUG_ON(1);
+ }
+ init_one_irq_desc(irq, desc, cpu);
+
+ irq_desc_ptrs[irq] = desc;
+
+out_unlock:
+ spin_unlock_irqrestore(&sparse_irq_lock, flags);
+
+ return desc;
+}
+
+#else
+
struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
[0 ... NR_IRQS-1] = {
.status = IRQ_DISABLED,
@@ -62,6 +218,8 @@ struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
}
};
+#endif
+
/*
* What should we do if we get a hw irq event on an illegal vector?
* Each architecture has to answer this themself.
@@ -179,8 +337,11 @@ unsigned int __do_IRQ(unsigned int irq)
/*
* No locking required for CPU-local interrupts:
*/
- if (desc->chip->ack)
+ if (desc->chip->ack) {
desc->chip->ack(irq);
+ /* get new one */
+ desc = irq_remap_to_desc(irq, desc);
+ }
if (likely(!(desc->status & IRQ_DISABLED))) {
action_ret = handle_IRQ_event(irq, desc->action);
if (!noirqdebug)
@@ -191,8 +352,10 @@ unsigned int __do_IRQ(unsigned int irq)
}
spin_lock(&desc->lock);
- if (desc->chip->ack)
+ if (desc->chip->ack) {
desc->chip->ack(irq);
+ desc = irq_remap_to_desc(irq, desc);
+ }
/*
* REPLAY is when Linux resends an IRQ that was dropped earlier
* WAITING is used by probe to mark irqs that are being tested
@@ -259,19 +422,25 @@ out:
}
#endif
-
-#ifdef CONFIG_TRACE_IRQFLAGS
-/*
- * lockdep: we want to handle all irq_desc locks as a single lock-class:
- */
-static struct lock_class_key irq_desc_lock_class;
-
void early_init_irq_lock_class(void)
{
struct irq_desc *desc;
int i;
- for_each_irq_desc(i, desc)
+ for_each_irq_desc(i, desc) {
+ if (!desc)
+ continue;
+
lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+ }
+}
+
+#ifdef CONFIG_SPARSE_IRQ
+unsigned int kstat_irqs_cpu(unsigned int irq, int cpu)
+{
+ struct irq_desc *desc = irq_to_desc(irq);
+ return desc->kstat_irqs[cpu];
}
#endif
+EXPORT_SYMBOL(kstat_irqs_cpu);
+
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 64c1c7253da..e6d0a43cc12 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -13,6 +13,11 @@ extern void compat_irq_chip_set_default_handler(struct irq_desc *desc);
extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
unsigned long flags);
+extern struct lock_class_key irq_desc_lock_class;
+extern void init_kstat_irqs(struct irq_desc *desc, int cpu, int nr);
+extern spinlock_t sparse_irq_lock;
+extern struct irq_desc *irq_desc_ptrs[NR_IRQS];
+
#ifdef CONFIG_PROC_FS
extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
extern void register_handler_proc(unsigned int irq, struct irqaction *action);
diff --git a/kernel/irq/numa_migrate.c b/kernel/irq/numa_migrate.c
new file mode 100644
index 00000000000..089c3746358
--- /dev/null
+++ b/kernel/irq/numa_migrate.c
@@ -0,0 +1,122 @@
+/*
+ * NUMA irq-desc migration code
+ *
+ * Migrate IRQ data structures (irq_desc, chip_data, etc.) over to
+ * the new "home node" of the IRQ.
+ */
+
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/random.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+
+#include "internals.h"
+
+static void init_copy_kstat_irqs(struct irq_desc *old_desc,
+ struct irq_desc *desc,
+ int cpu, int nr)
+{
+ unsigned long bytes;
+
+ init_kstat_irqs(desc, cpu, nr);
+
+ if (desc->kstat_irqs != old_desc->kstat_irqs) {
+ /* Compute how many bytes we need per irq and allocate them */
+ bytes = nr * sizeof(unsigned int);
+
+ memcpy(desc->kstat_irqs, old_desc->kstat_irqs, bytes);
+ }
+}
+
+static void free_kstat_irqs(struct irq_desc *old_desc, struct irq_desc *desc)
+{
+ if (old_desc->kstat_irqs == desc->kstat_irqs)
+ return;
+
+ kfree(old_desc->kstat_irqs);
+ old_desc->kstat_irqs = NULL;
+}
+
+static void init_copy_one_irq_desc(int irq, struct irq_desc *old_desc,
+ struct irq_desc *desc, int cpu)
+{
+ memcpy(desc, old_desc, sizeof(struct irq_desc));
+ desc->cpu = cpu;
+ lockdep_set_class(&desc->lock, &irq_desc_lock_class);
+ init_copy_kstat_irqs(old_desc, desc, cpu, nr_cpu_ids);
+ arch_init_copy_chip_data(old_desc, desc, cpu);
+}
+
+static void free_one_irq_desc(struct irq_desc *old_desc, struct irq_desc *desc)
+{
+ free_kstat_irqs(old_desc, desc);
+ arch_free_chip_data(old_desc, desc);
+}
+
+static struct irq_desc *__real_move_irq_desc(struct irq_desc *old_desc,
+ int cpu)
+{
+ struct irq_desc *desc;
+ unsigned int irq;
+ unsigned long flags;
+ int node;
+
+ irq = old_desc->irq;
+
+ spin_lock_irqsave(&sparse_irq_lock, flags);
+
+ /* We have to check it to avoid races with another CPU */
+ desc = irq_desc_ptrs[irq];
+
+ if (desc && old_desc != desc)
+ goto out_unlock;
+
+ node = cpu_to_node(cpu);
+ desc = kzalloc_node(sizeof(*desc), GFP_ATOMIC, node);
+ printk(KERN_DEBUG " move irq_desc for %d to cpu %d node %d\n",
+ irq, cpu, node);
+ if (!desc) {
+ printk(KERN_ERR "can not get new irq_desc for moving\n");
+ /* still use old one */
+ desc = old_desc;
+ goto out_unlock;
+ }
+ init_copy_one_irq_desc(irq, old_desc, desc, cpu);
+
+ irq_desc_ptrs[irq] = desc;
+
+ /* free the old one */
+ free_one_irq_desc(old_desc, desc);
+ kfree(old_desc);
+
+out_unlock:
+ spin_unlock_irqrestore(&sparse_irq_lock, flags);
+
+ return desc;
+}
+
+struct irq_desc *move_irq_desc(struct irq_desc *desc, int cpu)
+{
+ int old_cpu;
+ int node, old_node;
+
+ /* those all static, do move them */
+ if (desc->irq < NR_IRQS_LEGACY)
+ return desc;
+
+ old_cpu = desc->cpu;
+ printk(KERN_DEBUG
+ "try to move irq_desc from cpu %d to %d\n", old_cpu, cpu);
+ if (old_cpu != cpu) {
+ node = cpu_to_node(cpu);
+ old_node = cpu_to_node(old_cpu);
+ if (old_node != node)
+ desc = __real_move_irq_desc(desc, cpu);
+ else
+ desc->cpu = cpu;
+ }
+
+ return desc;
+}
+
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index d257e7d6a8a..f6b3440f05b 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -243,7 +243,11 @@ void init_irq_proc(void)
/*
* Create entries for all existing IRQs.
*/
- for_each_irq_desc(irq, desc)
+ for_each_irq_desc(irq, desc) {
+ if (!desc)
+ continue;
+
register_irq_proc(irq, desc);
+ }
}
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index dd364c11e56..3738107531f 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -91,6 +91,9 @@ static int misrouted_irq(int irq)
int i, ok = 0;
for_each_irq_desc(i, desc) {
+ if (!desc)
+ continue;
+
if (!i)
continue;
@@ -112,6 +115,8 @@ static void poll_spurious_irqs(unsigned long dummy)
for_each_irq_desc(i, desc) {
unsigned int status;
+ if (!desc)
+ continue;
if (!i)
continue;
diff --git a/kernel/latencytop.c b/kernel/latencytop.c
index 5e7b45c5692..449db466bdb 100644
--- a/kernel/latencytop.c
+++ b/kernel/latencytop.c
@@ -191,7 +191,7 @@ static int lstats_show(struct seq_file *m, void *v)
latency_record[i].time,
latency_record[i].max);
for (q = 0; q < LT_BACKTRACEDEPTH; q++) {
- char sym[KSYM_NAME_LEN];
+ char sym[KSYM_SYMBOL_LEN];
char *c;
if (!latency_record[i].backtrace[q])
break;
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 895337b16a2..4e5288a831d 100644
--- a/kernel/posix-cpu-timers.c
+++ b/kernel/posix-cpu-timers.c
@@ -311,7 +311,7 @@ static int cpu_clock_sample_group(const clockid_t which_clock,
struct task_cputime cputime;
thread_group_cputime(p, &cputime);
- switch (which_clock) {
+ switch (CPUCLOCK_WHICH(which_clock)) {
default:
return -EINVAL;
case CPUCLOCK_PROF:
diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c
index 5e79c662294..a140e44eebb 100644
--- a/kernel/posix-timers.c
+++ b/kernel/posix-timers.c
@@ -197,6 +197,11 @@ static int common_timer_create(struct k_itimer *new_timer)
return 0;
}
+static int no_timer_create(struct k_itimer *new_timer)
+{
+ return -EOPNOTSUPP;
+}
+
/*
* Return nonzero if we know a priori this clockid_t value is bogus.
*/
@@ -248,6 +253,7 @@ static __init int init_posix_timers(void)
.clock_getres = hrtimer_get_res,
.clock_get = posix_get_monotonic_raw,
.clock_set = do_posix_clock_nosettime,
+ .timer_create = no_timer_create,
};
register_posix_clock(CLOCK_REALTIME, &clock_realtime);
diff --git a/kernel/power/swap.c b/kernel/power/swap.c
index b7713b53d07..6da14358537 100644
--- a/kernel/power/swap.c
+++ b/kernel/power/swap.c
@@ -633,7 +633,7 @@ void swsusp_close(fmode_t mode)
return;
}
- blkdev_put(resume_bdev, mode); /* move up */
+ blkdev_put(resume_bdev, mode);
}
static int swsusp_header_init(void)
diff --git a/kernel/relay.c b/kernel/relay.c
index 32b0befdcb6..09ac2008f77 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1317,12 +1317,9 @@ static ssize_t relay_file_splice_read(struct file *in,
if (ret < 0)
break;
else if (!ret) {
- if (spliced)
- break;
- if (flags & SPLICE_F_NONBLOCK) {
+ if (flags & SPLICE_F_NONBLOCK)
ret = -EAGAIN;
- break;
- }
+ break;
}
*ppos += ret;
diff --git a/kernel/sched.c b/kernel/sched.c
index b7480fb5c3d..e4bb1dd7b30 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6587,7 +6587,9 @@ migration_call(struct notifier_block *nfb, unsigned long action, void *hcpu)
req = list_entry(rq->migration_queue.next,
struct migration_req, list);
list_del_init(&req->list);
+ spin_unlock_irq(&rq->lock);
complete(&req->done);
+ spin_lock_irq(&rq->lock);
}
spin_unlock_irq(&rq->lock);
break;
diff --git a/kernel/sched_clock.c b/kernel/sched_clock.c
index 81787248b60..e8ab096ddfe 100644
--- a/kernel/sched_clock.c
+++ b/kernel/sched_clock.c
@@ -118,13 +118,13 @@ static u64 __update_sched_clock(struct sched_clock_data *scd, u64 now)
/*
* scd->clock = clamp(scd->tick_gtod + delta,
- * max(scd->tick_gtod, scd->clock),
- * max(scd->clock, scd->tick_gtod + TICK_NSEC));
+ * max(scd->tick_gtod, scd->clock),
+ * scd->tick_gtod + TICK_NSEC);
*/
clock = scd->tick_gtod + delta;
min_clock = wrap_max(scd->tick_gtod, scd->clock);
- max_clock = wrap_max(scd->clock, scd->tick_gtod + TICK_NSEC);
+ max_clock = scd->tick_gtod + TICK_NSEC;
clock = wrap_max(clock, min_clock);
clock = wrap_min(clock, max_clock);
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 3953e4aed73..dc0b3be6b7d 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -188,7 +188,7 @@ static void check_hung_task(struct task_struct *t, unsigned long now)
if ((long)(now - t->last_switch_timestamp) <
sysctl_hung_task_timeout_secs)
return;
- if (sysctl_hung_task_warnings < 0)
+ if (!sysctl_hung_task_warnings)
return;
sysctl_hung_task_warnings--;
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index e7acfb482a6..fa05e88aa76 100644
--- a/kernel/time/timekeeping.c
+++ b/kernel/time/timekeeping.c
@@ -518,6 +518,28 @@ void update_wall_time(void)
/* correct the clock when NTP error is too big */
clocksource_adjust(offset);
+ /*
+ * Since in the loop above, we accumulate any amount of time
+ * in xtime_nsec over a second into xtime.tv_sec, its possible for
+ * xtime_nsec to be fairly small after the loop. Further, if we're
+ * slightly speeding the clocksource up in clocksource_adjust(),
+ * its possible the required corrective factor to xtime_nsec could
+ * cause it to underflow.
+ *
+ * Now, we cannot simply roll the accumulated second back, since
+ * the NTP subsystem has been notified via second_overflow. So
+ * instead we push xtime_nsec forward by the amount we underflowed,
+ * and add that amount into the error.
+ *
+ * We'll correct this error next time through this function, when
+ * xtime_nsec is not as small.
+ */
+ if (unlikely((s64)clock->xtime_nsec < 0)) {
+ s64 neg = -(s64)clock->xtime_nsec;
+ clock->xtime_nsec = 0;
+ clock->error += neg << (NTP_SCALE_SHIFT - clock->shift);
+ }
+
/* store full nanoseconds into xtime after rounding it up and
* add the remainder to the error difference.
*/
generated by cgit v1.2.3 (git 2.25.1) at 2024-09-05 07:29:06 +0000