do CPU_DEAD migrating under read_lock(tasklist) instead of write_lock_irq(tasklist)

[pandora-kernel.git] / kernel / sys.c

diff --git a/kernel/sys.c b/kernel/sys.c
index 08562f4..8ae2e63 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -32,6 +32,7 @@
 #include <linux/getcpu.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/seccomp.h>
+#include <linux/cpu.h>
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
@@ -804,6 +805,7 @@ static void kernel_restart_prepare(char *cmd)
        blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
        system_state = SYSTEM_RESTART;
        device_shutdown();
+       sysdev_shutdown();
 }
 
 /**
@@ -860,6 +862,7 @@ void kernel_shutdown_prepare(enum system_states state)
 void kernel_halt(void)
 {
        kernel_shutdown_prepare(SYSTEM_HALT);
+       sysdev_shutdown();
        printk(KERN_EMERG "System halted.\n");
        machine_halt();
 }
@@ -876,6 +879,8 @@ void kernel_power_off(void)
        kernel_shutdown_prepare(SYSTEM_POWER_OFF);
        if (pm_power_off_prepare)
                pm_power_off_prepare();
+       disable_nonboot_cpus();
+       sysdev_shutdown();
        printk(KERN_EMERG "Power down.\n");
        machine_power_off();
 }
@@ -951,7 +956,7 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
                unlock_kernel();
                return -EINVAL;
 
-#ifdef CONFIG_SOFTWARE_SUSPEND
+#ifdef CONFIG_HIBERNATION
        case LINUX_REBOOT_CMD_SW_SUSPEND:
                {
                        int ret = hibernate();
@@ -1439,7 +1444,6 @@ asmlinkage long sys_times(struct tms __user * tbuf)
  * Auch. Had to add the 'did_exec' flag to conform completely to POSIX.
  * LBT 04.03.94
  */
-
 asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 {
        struct task_struct *p;
@@ -1467,7 +1471,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
        if (!thread_group_leader(p))
                goto out;
 
-       if (p->real_parent == group_leader) {
+       if (p->real_parent->tgid == group_leader->tgid) {
                err = -EPERM;
                if (task_session(p) != task_session(group_leader))
                        goto out;