Merge commit 'linus/master' into merge-linus

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

diff --git a/kernel/sys.c b/kernel/sys.c
index 0c9d3fa1f5ffc45d3dfe71daf459ff9994cb2f10..fc71f99fb469a22da88b08263e2609409566173b 100644 (file)
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -169,9 +169,9 @@ asmlinkage long sys_setpriority(int which, int who, int niceval)
                                pgrp = find_vpid(who);
                        else
                                pgrp = task_pgrp(current);
-                       do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+                       do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
                                error = set_one_prio(p, niceval, error);
-                       } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+                       } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case PRIO_USER:
                        user = current->user;
@@ -229,11 +229,11 @@ asmlinkage long sys_getpriority(int which, int who)
                                pgrp = find_vpid(who);
                        else
                                pgrp = task_pgrp(current);
-                       do_each_pid_task(pgrp, PIDTYPE_PGID, p) {
+                       do_each_pid_thread(pgrp, PIDTYPE_PGID, p) {
                                niceval = 20 - task_nice(p);
                                if (niceval > retval)
                                        retval = niceval;
-                       } while_each_pid_task(pgrp, PIDTYPE_PGID, p);
+                       } while_each_pid_thread(pgrp, PIDTYPE_PGID, p);
                        break;
                case PRIO_USER:
                        user = current->user;
@@ -274,7 +274,7 @@ void emergency_restart(void)
 }
 EXPORT_SYMBOL_GPL(emergency_restart);
 
-static void kernel_restart_prepare(char *cmd)
+void kernel_restart_prepare(char *cmd)
 {
        blocking_notifier_call_chain(&reboot_notifier_list, SYS_RESTART, cmd);
        system_state = SYSTEM_RESTART;
@@ -301,26 +301,6 @@ void kernel_restart(char *cmd)
 }
 EXPORT_SYMBOL_GPL(kernel_restart);
 
-/**
- *     kernel_kexec - reboot the system
- *
- *     Move into place and start executing a preloaded standalone
- *     executable.  If nothing was preloaded return an error.
- */
-static void kernel_kexec(void)
-{
-#ifdef CONFIG_KEXEC
-       struct kimage *image;
-       image = xchg(&kexec_image, NULL);
-       if (!image)
-               return;
-       kernel_restart_prepare(NULL);
-       printk(KERN_EMERG "Starting new kernel\n");
-       machine_shutdown();
-       machine_kexec(image);
-#endif
-}
-
 static void kernel_shutdown_prepare(enum system_states state)
 {
        blocking_notifier_call_chain(&reboot_notifier_list,
@@ -425,10 +405,15 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
                kernel_restart(buffer);
                break;
 
+#ifdef CONFIG_KEXEC
        case LINUX_REBOOT_CMD_KEXEC:
-               kernel_kexec();
-               unlock_kernel();
-               return -EINVAL;
+               {
+                       int ret;
+                       ret = kernel_kexec();
+                       unlock_kernel();
+                       return ret;
+               }
+#endif
 
 #ifdef CONFIG_HIBERNATION
        case LINUX_REBOOT_CMD_SW_SUSPEND:
@@ -1075,9 +1060,7 @@ asmlinkage long sys_setsid(void)
        group_leader->signal->leader = 1;
        __set_special_pids(sid);
 
-       spin_lock(&group_leader->sighand->siglock);
-       group_leader->signal->tty = NULL;
-       spin_unlock(&group_leader->sighand->siglock);
+       proc_clear_tty(group_leader);
 
        err = session;
 out:
@@ -1366,8 +1349,10 @@ asmlinkage long sys_sethostname(char __user *name, int len)
        down_write(&uts_sem);
        errno = -EFAULT;
        if (!copy_from_user(tmp, name, len)) {
-               memcpy(utsname()->nodename, tmp, len);
-               utsname()->nodename[len] = 0;
+               struct new_utsname *u = utsname();
+
+               memcpy(u->nodename, tmp, len);
+               memset(u->nodename + len, 0, sizeof(u->nodename) - len);
                errno = 0;
        }
        up_write(&uts_sem);
@@ -1379,15 +1364,17 @@ asmlinkage long sys_sethostname(char __user *name, int len)
 asmlinkage long sys_gethostname(char __user *name, int len)
 {
        int i, errno;
+       struct new_utsname *u;
 
        if (len < 0)
                return -EINVAL;
        down_read(&uts_sem);
-       i = 1 + strlen(utsname()->nodename);
+       u = utsname();
+       i = 1 + strlen(u->nodename);
        if (i > len)
                i = len;
        errno = 0;
-       if (copy_to_user(name, utsname()->nodename, i))
+       if (copy_to_user(name, u->nodename, i))
                errno = -EFAULT;
        up_read(&uts_sem);
        return errno;
@@ -1412,8 +1399,10 @@ asmlinkage long sys_setdomainname(char __user *name, int len)
        down_write(&uts_sem);
        errno = -EFAULT;
        if (!copy_from_user(tmp, name, len)) {
-               memcpy(utsname()->domainname, tmp, len);
-               utsname()->domainname[len] = 0;
+               struct new_utsname *u = utsname();
+
+               memcpy(u->domainname, tmp, len);
+               memset(u->domainname + len, 0, sizeof(u->domainname) - len);
                errno = 0;
        }
        up_write(&uts_sem);
@@ -1467,14 +1456,22 @@ asmlinkage long sys_setrlimit(unsigned int resource, struct rlimit __user *rlim)
                return -EINVAL;
        if (copy_from_user(&new_rlim, rlim, sizeof(*rlim)))
                return -EFAULT;
-       if (new_rlim.rlim_cur > new_rlim.rlim_max)
-               return -EINVAL;
        old_rlim = current->signal->rlim + resource;
        if ((new_rlim.rlim_max > old_rlim->rlim_max) &&
            !capable(CAP_SYS_RESOURCE))
                return -EPERM;
-       if (resource == RLIMIT_NOFILE && new_rlim.rlim_max > sysctl_nr_open)
-               return -EPERM;
+
+       if (resource == RLIMIT_NOFILE) {
+               if (new_rlim.rlim_max == RLIM_INFINITY)
+                       new_rlim.rlim_max = sysctl_nr_open;
+               if (new_rlim.rlim_cur == RLIM_INFINITY)
+                       new_rlim.rlim_cur = sysctl_nr_open;
+               if (new_rlim.rlim_max > sysctl_nr_open)
+                       return -EPERM;
+       }
+
+       if (new_rlim.rlim_cur > new_rlim.rlim_max)
+               return -EINVAL;
 
        retval = security_task_setrlimit(resource, &new_rlim);
        if (retval)
@@ -1742,6 +1739,16 @@ asmlinkage long sys_prctl(int option, unsigned long arg2, unsigned long arg3,
                case PR_SET_TSC:
                        error = SET_TSC_CTL(arg2);
                        break;
+               case PR_GET_TIMERSLACK:
+                       error = current->timer_slack_ns;
+                       break;
+               case PR_SET_TIMERSLACK:
+                       if (arg2 <= 0)
+                               current->timer_slack_ns =
+                                       current->default_timer_slack_ns;
+                       else
+                               current->timer_slack_ns = arg2;
+                       break;
                default:
                        error = -EINVAL;
                        break;