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authorIngo Molnar <mingo@elte.hu>2008-12-12 12:29:35 +0300
committerIngo Molnar <mingo@elte.hu>2008-12-12 12:29:35 +0300
commitc1dfdc7597d051b09555d4ae2acb90403e238746 (patch)
tree86aa49f5a2ab25459f9196dd6724bbe6645b1375 /kernel
parentefbe027e95dc13ac343b6130948418d7ead7ddf1 (diff)
parent8b1fae4e4200388b64dd88065639413cb3f1051c (diff)
downloadlinux-c1dfdc7597d051b09555d4ae2acb90403e238746.tar.xz
Merge commit 'v2.6.28-rc8' into sched/core
Diffstat (limited to 'kernel')
-rw-r--r--kernel/audit.c32
-rw-r--r--kernel/auditsc.c24
-rw-r--r--kernel/fork.c16
-rw-r--r--kernel/latencytop.c2
-rw-r--r--kernel/panic.c1
-rw-r--r--kernel/posix-cpu-timers.c2
-rw-r--r--kernel/power/swap.c2
-rw-r--r--kernel/relay.c7
-rw-r--r--kernel/sched.c2
-rw-r--r--kernel/softlockup.c2
-rw-r--r--kernel/sysctl.c10
-rw-r--r--kernel/time/timekeeping.c22
12 files changed, 94 insertions, 28 deletions
diff --git a/kernel/audit.c b/kernel/audit.c
index 4414e93d8750..ce6d8ea3131e 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 cf5bc2f5f9c3..2a3f0afc4d2a 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/fork.c b/kernel/fork.c
index 2a372a0e206f..495da2e9a8b4 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/latencytop.c b/kernel/latencytop.c
index 5e7b45c56923..449db466bdbc 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/panic.c b/kernel/panic.c
index 6513aac8e992..4d5088355bfe 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -167,6 +167,7 @@ static const struct tnt tnts[] = {
* 'M' - System experienced a machine check exception.
* 'B' - System has hit bad_page.
* 'U' - Userspace-defined naughtiness.
+ * 'D' - Kernel has oopsed before
* 'A' - ACPI table overridden.
* 'W' - Taint on warning.
* 'C' - modules from drivers/staging are loaded.
diff --git a/kernel/posix-cpu-timers.c b/kernel/posix-cpu-timers.c
index 895337b16a24..4e5288a831de 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/power/swap.c b/kernel/power/swap.c
index b7713b53d07a..6da14358537c 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 32b0befdcb6a..09ac2008f77b 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 bb9c6384d077..ef212da928e8 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -6564,7 +6564,9 @@ 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/softlockup.c b/kernel/softlockup.c
index 3953e4aed733..dc0b3be6b7d5 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/sysctl.c b/kernel/sysctl.c
index 9d048fa2d902..3d56fe7570da 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -176,6 +176,9 @@ extern struct ctl_table random_table[];
#ifdef CONFIG_INOTIFY_USER
extern struct ctl_table inotify_table[];
#endif
+#ifdef CONFIG_EPOLL
+extern struct ctl_table epoll_table[];
+#endif
#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
int sysctl_legacy_va_layout;
@@ -1325,6 +1328,13 @@ static struct ctl_table fs_table[] = {
.child = inotify_table,
},
#endif
+#ifdef CONFIG_EPOLL
+ {
+ .procname = "epoll",
+ .mode = 0555,
+ .child = epoll_table,
+ },
+#endif
#endif
{
.ctl_name = KERN_SETUID_DUMPABLE,
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
index e7acfb482a68..fa05e88aa76f 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.
*/