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Merge branch 'timers-for-linus-clocksource' of git://git.kernel.org/pub/scm/linux...
[safe/jmp/linux-2.6] / kernel / sysctl.c
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 3e38b74..ce664f9 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -48,6 +48,8 @@
 #include <linux/acpi.h>
 #include <linux/reboot.h>
 #include <linux/ftrace.h>
+#include <linux/slow-work.h>
+#include <linux/perf_counter.h>
 
 #include <asm/uaccess.h>
 #include <asm/processor.h>
@@ -95,14 +97,15 @@ static int sixty = 60;
 static int neg_one = -1;
 #endif
 
-#if defined(CONFIG_MMU) && defined(CONFIG_FILE_LOCKING)
-static int two = 2;
-#endif
-
 static int zero;
-static int one = 1;
+static int __maybe_unused one = 1;
+static int __maybe_unused two = 2;
+static unsigned long one_ul = 1;
 static int one_hundred = 100;
 
+/* this is needed for the proc_doulongvec_minmax of vm_dirty_bytes */
+static unsigned long dirty_bytes_min = 2 * PAGE_SIZE;
+
 /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
 static int maxolduid = 65535;
 static int minolduid;
@@ -112,6 +115,7 @@ static int ngroups_max = NGROUPS_MAX;
 
 #ifdef CONFIG_MODULES
 extern char modprobe_path[];
+extern int modules_disabled;
 #endif
 #ifdef CONFIG_CHR_DEV_SG
 extern int sg_big_buff;
@@ -144,6 +148,7 @@ extern int acct_parm[];
 
 #ifdef CONFIG_IA64
 extern int no_unaligned_warning;
+extern int unaligned_dump_stack;
 #endif
 
 #ifdef CONFIG_RT_MUTEXES
@@ -531,6 +536,17 @@ static struct ctl_table kern_table[] = {
                .proc_handler   = &proc_dostring,
                .strategy       = &sysctl_string,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "modules_disabled",
+               .data           = &modules_disabled,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               /* only handle a transition from default "0" to "1" */
+               .proc_handler   = &proc_dointvec_minmax,
+               .extra1         = &one,
+               .extra2         = &one,
+       },
 #endif
 #if defined(CONFIG_HOTPLUG) && defined(CONFIG_NET)
        {
@@ -728,6 +744,14 @@ static struct ctl_table kern_table[] = {
        },
        {
                .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "bootloader_version",
+               .data           = &bootloader_version,
+               .maxlen         = sizeof (int),
+               .mode           = 0444,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
                .procname       = "kstack_depth_to_print",
                .data           = &kstack_depth_to_print,
                .maxlen         = sizeof(int),
@@ -781,6 +805,14 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "unaligned-dump-stack",
+               .data           = &unaligned_dump_stack,
+               .maxlen         = sizeof (int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
 #endif
 #ifdef CONFIG_DETECT_SOFTLOCKUP
        {
@@ -800,11 +832,24 @@ static struct ctl_table kern_table[] = {
                .data           = &softlockup_thresh,
                .maxlen         = sizeof(int),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
+               .proc_handler   = &proc_dosoftlockup_thresh,
                .strategy       = &sysctl_intvec,
                .extra1         = &neg_one,
                .extra2         = &sixty,
        },
+#endif
+#ifdef CONFIG_DETECT_HUNG_TASK
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "hung_task_panic",
+               .data           = &sysctl_hung_task_panic,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec_minmax,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &zero,
+               .extra2         = &one,
+       },
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "hung_task_check_count",
@@ -820,7 +865,7 @@ static struct ctl_table kern_table[] = {
                .data           = &sysctl_hung_task_timeout_secs,
                .maxlen         = sizeof(unsigned long),
                .mode           = 0644,
-               .proc_handler   = &proc_doulongvec_minmax,
+               .proc_handler   = &proc_dohung_task_timeout_secs,
                .strategy       = &sysctl_intvec,
        },
        {
@@ -880,14 +925,38 @@ static struct ctl_table kern_table[] = {
                .proc_handler   = &proc_dointvec,
        },
 #endif
-#ifdef CONFIG_UNEVICTABLE_LRU
+#ifdef CONFIG_SLOW_WORK
        {
                .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "scan_unevictable_pages",
-               .data           = &scan_unevictable_pages,
-               .maxlen         = sizeof(scan_unevictable_pages),
+               .procname       = "slow-work",
+               .mode           = 0555,
+               .child          = slow_work_sysctls,
+       },
+#endif
+#ifdef CONFIG_PERF_COUNTERS
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "perf_counter_paranoid",
+               .data           = &sysctl_perf_counter_paranoid,
+               .maxlen         = sizeof(sysctl_perf_counter_paranoid),
                .mode           = 0644,
-               .proc_handler   = &scan_unevictable_handler,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "perf_counter_mlock_kb",
+               .data           = &sysctl_perf_counter_mlock,
+               .maxlen         = sizeof(sysctl_perf_counter_mlock),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "perf_counter_max_sample_rate",
+               .data           = &sysctl_perf_counter_sample_rate,
+               .maxlen         = sizeof(sysctl_perf_counter_sample_rate),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
        },
 #endif
 /*
@@ -965,7 +1034,7 @@ static struct ctl_table vm_table[] = {
                .mode           = 0644,
                .proc_handler   = &dirty_background_bytes_handler,
                .strategy       = &sysctl_intvec,
-               .extra1         = &one,
+               .extra1         = &one_ul,
        },
        {
                .ctl_name       = VM_DIRTY_RATIO,
@@ -986,7 +1055,7 @@ static struct ctl_table vm_table[] = {
                .mode           = 0644,
                .proc_handler   = &dirty_bytes_handler,
                .strategy       = &sysctl_intvec,
-               .extra1         = &one,
+               .extra1         = &dirty_bytes_min,
        },
        {
                .procname       = "dirty_writeback_centisecs",
@@ -1000,7 +1069,7 @@ static struct ctl_table vm_table[] = {
                .data           = &dirty_expire_interval,
                .maxlen         = sizeof(dirty_expire_interval),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_userhz_jiffies,
+               .proc_handler   = &proc_dointvec,
        },
        {
                .ctl_name       = VM_NR_PDFLUSH_THREADS,
@@ -1203,7 +1272,6 @@ static struct ctl_table vm_table[] = {
                .strategy       = &sysctl_jiffies,
        },
 #endif
-#ifdef CONFIG_SECURITY
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "mmap_min_addr",
@@ -1212,7 +1280,6 @@ static struct ctl_table vm_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_doulongvec_minmax,
        },
-#endif
 #ifdef CONFIG_NUMA
        {
                .ctl_name       = CTL_UNNUMBERED,
@@ -1250,6 +1317,16 @@ static struct ctl_table vm_table[] = {
                .extra2         = &one,
        },
 #endif
+#ifdef CONFIG_UNEVICTABLE_LRU
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "scan_unevictable_pages",
+               .data           = &scan_unevictable_pages,
+               .maxlen         = sizeof(scan_unevictable_pages),
+               .mode           = 0644,
+               .proc_handler   = &scan_unevictable_handler,
+       },
+#endif
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
@@ -1363,10 +1440,7 @@ static struct ctl_table fs_table[] = {
                .data           = &lease_break_time,
                .maxlen         = sizeof(int),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec_minmax,
-               .strategy       = &sysctl_intvec,
-               .extra1         = &zero,
-               .extra2         = &two,
+               .proc_handler   = &proc_dointvec,
        },
 #endif
 #ifdef CONFIG_AIO
@@ -1407,7 +1481,10 @@ static struct ctl_table fs_table[] = {
                .data           = &suid_dumpable,
                .maxlen         = sizeof(int),
                .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
+               .proc_handler   = &proc_dointvec_minmax,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &zero,
+               .extra2         = &two,
        },
 #if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
        {
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