Merge branch 'linus' into perfcounters/core

[~andy/linux] / kernel / sys.c

diff --git a/kernel/sys.c b/kernel/sys.c
index 51dbb55604e847991023697267d26c9216497ce7..438d99a38c87f343dd318c3966799ec73bb6072a 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -14,6 +14,7 @@
 #include <linux/prctl.h>
 #include <linux/highuid.h>
 #include <linux/fs.h>
+#include <linux/perf_counter.h>
 #include <linux/resource.h>
 #include <linux/kernel.h>
 #include <linux/kexec.h>
@@ -360,6 +361,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
                void __user *, arg)
 {
        char buffer[256];
+       int ret = 0;
 
        /* We only trust the superuser with rebooting the system. */
        if (!capable(CAP_SYS_BOOT))
@@ -397,7 +399,7 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
                kernel_halt();
                unlock_kernel();
                do_exit(0);
-               break;
+               panic("cannot halt");
 
        case LINUX_REBOOT_CMD_POWER_OFF:
                kernel_power_off();
@@ -417,29 +419,22 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
 
 #ifdef CONFIG_KEXEC
        case LINUX_REBOOT_CMD_KEXEC:
-               {
-                       int ret;
-                       ret = kernel_kexec();
-                       unlock_kernel();
-                       return ret;
-               }
+               ret = kernel_kexec();
+               break;
 #endif
 
 #ifdef CONFIG_HIBERNATION
        case LINUX_REBOOT_CMD_SW_SUSPEND:
-               {
-                       int ret = hibernate();
-                       unlock_kernel();
-                       return ret;
-               }
+               ret = hibernate();
+               break;
 #endif
 
        default:
-               unlock_kernel();
-               return -EINVAL;
+               ret = -EINVAL;
+               break;
        }
        unlock_kernel();
-       return 0;
+       return ret;
 }
 
 static void deferred_cad(struct work_struct *dummy)
@@ -1799,6 +1794,12 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
                case PR_SET_TSC:
                        error = SET_TSC_CTL(arg2);
                        break;
+               case PR_TASK_PERF_COUNTERS_DISABLE:
+                       error = perf_counter_task_disable();
+                       break;
+               case PR_TASK_PERF_COUNTERS_ENABLE:
+                       error = perf_counter_task_enable();
+                       break;
                case PR_GET_TIMERSLACK:
                        error = current->timer_slack_ns;
                        break;