Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / kernel / sysctl.c

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 5abfa151855493735a91fd45a255a45727c8ba97..4eed0af5d1442c6ec4cfbd2f6c82e48debdca677 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/sysctl.h>
 #include <linux/signal.h>
+#include <linux/printk.h>
 #include <linux/proc_fs.h>
 #include <linux/security.h>
 #include <linux/ctype.h>
@@ -169,7 +170,8 @@ static int proc_taint(struct ctl_table *table, int write,
 #endif
 
 #ifdef CONFIG_MAGIC_SYSRQ
-static int __sysrq_enabled; /* Note: sysrq code ises it's own private copy */
+/* Note: sysrq code uses it's own private copy */
+static int __sysrq_enabled = SYSRQ_DEFAULT_ENABLE;
 
 static int sysrq_sysctl_handler(ctl_table *table, int write,
                                void __user *buffer, size_t *lenp,
@@ -192,9 +194,9 @@ static int sysrq_sysctl_handler(ctl_table *table, int write,
 static struct ctl_table root_table[];
 static struct ctl_table_root sysctl_table_root;
 static struct ctl_table_header root_table_header = {
-       .count = 1,
+       {{.count = 1,
        .ctl_table = root_table,
-       .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),
+       .ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),}},
        .root = &sysctl_table_root,
        .set = &sysctl_table_root.default_set,
 };
@@ -245,10 +247,6 @@ static struct ctl_table root_table[] = {
                .mode           = 0555,
                .child          = dev_table,
        },
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
        { }
 };
 
@@ -259,8 +257,6 @@ static int min_wakeup_granularity_ns;                       /* 0 usecs */
 static int max_wakeup_granularity_ns = NSEC_PER_SEC;   /* 1 second */
 static int min_sched_tunable_scaling = SCHED_TUNABLESCALING_NONE;
 static int max_sched_tunable_scaling = SCHED_TUNABLESCALING_END-1;
-static int min_sched_shares_ratelimit = 100000; /* 100 usec */
-static int max_sched_shares_ratelimit = NSEC_PER_SEC; /* 1 second */
 #endif
 
 #ifdef CONFIG_COMPACTION
@@ -304,15 +300,6 @@ static struct ctl_table kern_table[] = {
                .extra1         = &min_wakeup_granularity_ns,
                .extra2         = &max_wakeup_granularity_ns,
        },
-       {
-               .procname       = "sched_shares_ratelimit",
-               .data           = &sysctl_sched_shares_ratelimit,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = sched_proc_update_handler,
-               .extra1         = &min_sched_shares_ratelimit,
-               .extra2         = &max_sched_shares_ratelimit,
-       },
        {
                .procname       = "sched_tunable_scaling",
                .data           = &sysctl_sched_tunable_scaling,
@@ -322,14 +309,6 @@ static struct ctl_table kern_table[] = {
                .extra1         = &min_sched_tunable_scaling,
                .extra2         = &max_sched_tunable_scaling,
        },
-       {
-               .procname       = "sched_shares_thresh",
-               .data           = &sysctl_sched_shares_thresh,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = proc_dointvec_minmax,
-               .extra1         = &zero,
-       },
        {
                .procname       = "sched_migration_cost",
                .data           = &sysctl_sched_migration_cost,
@@ -351,6 +330,13 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec,
        },
+       {
+               .procname       = "sched_shares_window",
+               .data           = &sysctl_sched_shares_window,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec,
+       },
        {
                .procname       = "timer_migration",
                .data           = &sysctl_timer_migration,
@@ -382,6 +368,17 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = proc_dointvec,
        },
+#ifdef CONFIG_SCHED_AUTOGROUP
+       {
+               .procname       = "sched_autogroup_enabled",
+               .data           = &sysctl_sched_autogroup_enabled,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec,
+               .extra1         = &zero,
+               .extra2         = &one,
+       },
+#endif
 #ifdef CONFIG_PROVE_LOCKING
        {
                .procname       = "prove_locking",
@@ -711,6 +708,15 @@ static struct ctl_table kern_table[] = {
                .extra1         = &zero,
                .extra2         = &one,
        },
+       {
+               .procname       = "kptr_restrict",
+               .data           = &kptr_restrict,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = &zero,
+               .extra2         = &two,
+       },
 #endif
        {
                .procname       = "ngroups_max",
@@ -745,21 +751,21 @@ static struct ctl_table kern_table[] = {
                .extra1         = &zero,
                .extra2         = &one,
        },
-#endif
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86) && !defined(CONFIG_LOCKUP_DETECTOR)
        {
-               .procname       = "unknown_nmi_panic",
-               .data           = &unknown_nmi_panic,
+               .procname       = "nmi_watchdog",
+               .data           = &watchdog_enabled,
                .maxlen         = sizeof (int),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec,
+               .proc_handler   = proc_dowatchdog_enabled,
        },
+#endif
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
        {
-               .procname       = "nmi_watchdog",
-               .data           = &nmi_watchdog_enabled,
+               .procname       = "unknown_nmi_panic",
+               .data           = &unknown_nmi_panic,
                .maxlen         = sizeof (int),
                .mode           = 0644,
-               .proc_handler   = proc_nmi_enabled,
+               .proc_handler   = proc_dointvec,
        },
 #endif
 #if defined(CONFIG_X86)
@@ -963,10 +969,6 @@ static struct ctl_table kern_table[] = {
                .proc_handler   = proc_dointvec,
        },
 #endif
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
        { }
 };
 
@@ -1327,11 +1329,6 @@ static struct ctl_table vm_table[] = {
                .extra2         = &one,
        },
 #endif
-
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
        { }
 };
 
@@ -1487,10 +1484,6 @@ static struct ctl_table fs_table[] = {
                .proc_handler   = &pipe_proc_fn,
                .extra1         = &pipe_min_size,
        },
-/*
- * NOTE: do not add new entries to this table unless you have read
- * Documentation/sysctl/ctl_unnumbered.txt
- */
        { }
 };
 
@@ -1574,11 +1567,16 @@ void sysctl_head_get(struct ctl_table_header *head)
        spin_unlock(&sysctl_lock);
 }
 
+static void free_head(struct rcu_head *rcu)
+{
+       kfree(container_of(rcu, struct ctl_table_header, rcu));
+}
+
 void sysctl_head_put(struct ctl_table_header *head)
 {
        spin_lock(&sysctl_lock);
        if (!--head->count)
-               kfree(head);
+               call_rcu(&head->rcu, free_head);
        spin_unlock(&sysctl_lock);
 }
 
@@ -1955,10 +1953,10 @@ void unregister_sysctl_table(struct ctl_table_header * header)
        start_unregistering(header);
        if (!--header->parent->count) {
                WARN_ON(1);
-               kfree(header->parent);
+               call_rcu(&header->parent->rcu, free_head);
        }
        if (!--header->count)
-               kfree(header);
+               call_rcu(&header->rcu, free_head);
        spin_unlock(&sysctl_lock);
 }
 
@@ -2900,7 +2898,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
        }
 }
 
-#else /* CONFIG_PROC_FS */
+#else /* CONFIG_PROC_SYSCTL */
 
 int proc_dostring(struct ctl_table *table, int write,
                  void __user *buffer, size_t *lenp, loff_t *ppos)
@@ -2952,7 +2950,7 @@ int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
 }
 
 
-#endif /* CONFIG_PROC_FS */
+#endif /* CONFIG_PROC_SYSCTL */
 
 /*
  * No sense putting this after each symbol definition, twice,