[ARM] 4750/1: [AT91] STN LCD displays on SAM9261

[linux-2.6-omap-h63xx.git] / kernel / sysctl.c

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3b4efbe2644572a32576b1a591f003e9869699f0..8e96558cb8f395394e92676349fefcc887feca50 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -81,6 +81,7 @@ extern int compat_log;
 extern int maps_protect;
 extern int sysctl_stat_interval;
 extern int audit_argv_kb;
+extern int latencytop_enabled;
 
 /* Constants used for minimum and  maximum */
 #ifdef CONFIG_DETECT_SOFTLOCKUP
@@ -225,21 +226,24 @@ static struct ctl_table root_table[] = {
 };
 
 #ifdef CONFIG_SCHED_DEBUG
-static unsigned long min_sched_granularity_ns = 100000;                /* 100 usecs */
-static unsigned long max_sched_granularity_ns = 1000000000;    /* 1 second */
-static unsigned long min_wakeup_granularity_ns;                        /* 0 usecs */
-static unsigned long max_wakeup_granularity_ns = 1000000000;   /* 1 second */
+static int min_sched_granularity_ns = 100000;          /* 100 usecs */
+static int max_sched_granularity_ns = NSEC_PER_SEC;    /* 1 second */
+static int min_wakeup_granularity_ns;                  /* 0 usecs */
+static int max_wakeup_granularity_ns = NSEC_PER_SEC;   /* 1 second */
 #endif
 
 static struct ctl_table kern_table[] = {
 #ifdef CONFIG_SCHED_DEBUG
        {
                .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "sched_nr_latency",
-               .data           = &sysctl_sched_nr_latency,
+               .procname       = "sched_min_granularity_ns",
+               .data           = &sysctl_sched_min_granularity,
                .maxlen         = sizeof(unsigned int),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
+               .proc_handler   = &sched_nr_latency_handler,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &min_sched_granularity_ns,
+               .extra2         = &max_sched_granularity_ns,
        },
        {
                .ctl_name       = CTL_UNNUMBERED,
@@ -247,7 +251,7 @@ static struct ctl_table kern_table[] = {
                .data           = &sysctl_sched_latency,
                .maxlen         = sizeof(unsigned int),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
+               .proc_handler   = &sched_nr_latency_handler,
                .strategy       = &sysctl_intvec,
                .extra1         = &min_sched_granularity_ns,
                .extra2         = &max_sched_granularity_ns,
@@ -298,6 +302,48 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_nr_migrate",
+               .data           = &sysctl_sched_nr_migrate,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_rt_period_ms",
+               .data           = &sysctl_sched_rt_period,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_rt_ratio",
+               .data           = &sysctl_sched_rt_ratio,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+#if defined(CONFIG_FAIR_GROUP_SCHED) && defined(CONFIG_SMP)
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_min_bal_int_shares",
+               .data           = &sysctl_sched_min_bal_int_shares,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_max_bal_int_shares",
+               .data           = &sysctl_sched_max_bal_int_shares,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+#endif
 #endif
        {
                .ctl_name       = CTL_UNNUMBERED,
@@ -371,6 +417,15 @@ static struct ctl_table kern_table[] = {
                .proc_handler   = &proc_dointvec_taint,
        },
 #endif
+#ifdef CONFIG_LATENCYTOP
+       {
+               .procname       = "latencytop",
+               .data           = &latencytop_enabled,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+#endif
 #ifdef CONFIG_SECURITY_CAPABILITIES
        {
                .procname       = "cap-bound",
@@ -717,13 +772,40 @@ static struct ctl_table kern_table[] = {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "softlockup_thresh",
                .data           = &softlockup_thresh,
-               .maxlen         = sizeof(int),
+               .maxlen         = sizeof(unsigned long),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
+               .proc_handler   = &proc_doulongvec_minmax,
                .strategy       = &sysctl_intvec,
                .extra1         = &one,
                .extra2         = &sixty,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "hung_task_check_count",
+               .data           = &sysctl_hung_task_check_count,
+               .maxlen         = sizeof(unsigned long),
+               .mode           = 0644,
+               .proc_handler   = &proc_doulongvec_minmax,
+               .strategy       = &sysctl_intvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "hung_task_timeout_secs",
+               .data           = &sysctl_hung_task_timeout_secs,
+               .maxlen         = sizeof(unsigned long),
+               .mode           = 0644,
+               .proc_handler   = &proc_doulongvec_minmax,
+               .strategy       = &sysctl_intvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "hung_task_warnings",
+               .data           = &sysctl_hung_task_warnings,
+               .maxlen         = sizeof(unsigned long),
+               .mode           = 0644,
+               .proc_handler   = &proc_doulongvec_minmax,
+               .strategy       = &sysctl_intvec,
+       },
 #endif
 #ifdef CONFIG_COMPAT
        {
@@ -895,11 +977,11 @@ static struct ctl_table vm_table[] = {
        },
        {
                .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "hugetlb_dynamic_pool",
-               .data           = &hugetlb_dynamic_pool,
-               .maxlen         = sizeof(hugetlb_dynamic_pool),
+               .procname       = "nr_overcommit_hugepages",
+               .data           = &nr_overcommit_huge_pages,
+               .maxlen         = sizeof(nr_overcommit_huge_pages),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
+               .proc_handler   = &proc_doulongvec_minmax,
        },
 #endif
        {
@@ -1577,6 +1659,10 @@ struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
 void unregister_sysctl_table(struct ctl_table_header * header)
 {
        might_sleep();
+
+       if (header == NULL)
+               return;
+
        spin_lock(&sysctl_lock);
        start_unregistering(header);
        spin_unlock(&sysctl_lock);
@@ -2609,6 +2695,10 @@ static int deprecated_sysctl_warning(struct __sysctl_args *args)
        int name[CTL_MAXNAME];
        int i;
 
+       /* Check args->nlen. */
+       if (args->nlen < 0 || args->nlen > CTL_MAXNAME)
+               return -ENOTDIR;
+
        /* Read in the sysctl name for better debug message logging */
        for (i = 0; i < args->nlen; i++)
                if (get_user(name[i], args->name + i))