X-Git-Url: http://pileus.org/git/?a=blobdiff_plain;f=kernel%2Fsys.c;h=b6941e06d5d507a141a135294c8d29e62ddd59d3;hb=7e4e574c391cdeef516411eb698ac6955f01d673;hp=c43b3e22bbda5b215515ca54c1f359e5a776c896;hpb=b26b9bc58263acda274f82a9dde8b6d96559878a;p=~andy%2Flinux

diff --git a/kernel/sys.c b/kernel/sys.c
index c43b3e22bbd..b6941e06d5d 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -32,6 +32,7 @@
 
 #include <linux/compat.h>
 #include <linux/syscalls.h>
+#include <linux/kprobes.h>
 
 #include <asm/uaccess.h>
 #include <asm/io.h>
@@ -168,7 +169,7 @@ EXPORT_SYMBOL(notifier_chain_unregister);
  *	of the last notifier function called.
  */
  
-int notifier_call_chain(struct notifier_block **n, unsigned long val, void *v)
+int __kprobes notifier_call_chain(struct notifier_block **n, unsigned long val, void *v)
 {
 	int ret=NOTIFY_DONE;
 	struct notifier_block *nb = *n;
@@ -488,6 +489,12 @@ asmlinkage long sys_reboot(int magic1, int magic2, unsigned int cmd, void __user
 	                magic2 != LINUX_REBOOT_MAGIC2C))
 		return -EINVAL;
 
+	/* Instead of trying to make the power_off code look like
+	 * halt when pm_power_off is not set do it the easy way.
+	 */
+	if ((cmd == LINUX_REBOOT_CMD_POWER_OFF) && !pm_power_off)
+		cmd = LINUX_REBOOT_CMD_HALT;
+
 	lock_kernel();
 	switch (cmd) {
 	case LINUX_REBOOT_CMD_RESTART:
@@ -1083,10 +1090,11 @@ asmlinkage long sys_times(struct tms __user * tbuf)
 asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 {
 	struct task_struct *p;
+	struct task_struct *group_leader = current->group_leader;
 	int err = -EINVAL;
 
 	if (!pid)
-		pid = current->pid;
+		pid = group_leader->pid;
 	if (!pgid)
 		pgid = pid;
 	if (pgid < 0)
@@ -1106,16 +1114,16 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 	if (!thread_group_leader(p))
 		goto out;
 
-	if (p->parent == current || p->real_parent == current) {
+	if (p->real_parent == group_leader) {
 		err = -EPERM;
-		if (p->signal->session != current->signal->session)
+		if (p->signal->session != group_leader->signal->session)
 			goto out;
 		err = -EACCES;
 		if (p->did_exec)
 			goto out;
 	} else {
 		err = -ESRCH;
-		if (p != current)
+		if (p != group_leader)
 			goto out;
 	}
 
@@ -1127,7 +1135,7 @@ asmlinkage long sys_setpgid(pid_t pid, pid_t pgid)
 		struct task_struct *p;
 
 		do_each_task_pid(pgid, PIDTYPE_PGID, p) {
-			if (p->signal->session == current->signal->session)
+			if (p->signal->session == group_leader->signal->session)
 				goto ok_pgid;
 		} while_each_task_pid(pgid, PIDTYPE_PGID, p);
 		goto out;
@@ -1207,24 +1215,22 @@ asmlinkage long sys_getsid(pid_t pid)
 
 asmlinkage long sys_setsid(void)
 {
+	struct task_struct *group_leader = current->group_leader;
 	struct pid *pid;
 	int err = -EPERM;
 
-	if (!thread_group_leader(current))
-		return -EINVAL;
-
 	down(&tty_sem);
 	write_lock_irq(&tasklist_lock);
 
-	pid = find_pid(PIDTYPE_PGID, current->pid);
+	pid = find_pid(PIDTYPE_PGID, group_leader->pid);
 	if (pid)
 		goto out;
 
-	current->signal->leader = 1;
-	__set_special_pids(current->pid, current->pid);
-	current->signal->tty = NULL;
-	current->signal->tty_old_pgrp = 0;
-	err = process_group(current);
+	group_leader->signal->leader = 1;
+	__set_special_pids(group_leader->pid, group_leader->pid);
+	group_leader->signal->tty = NULL;
+	group_leader->signal->tty_old_pgrp = 0;
+	err = process_group(group_leader);
 out:
 	write_unlock_irq(&tasklist_lock);
 	up(&tty_sem);
@@ -1497,6 +1503,8 @@ EXPORT_SYMBOL(in_egroup_p);
 
 DECLARE_RWSEM(uts_sem);
 
+EXPORT_SYMBOL(uts_sem);
+
 asmlinkage long sys_newuname(struct new_utsname __user * name)
 {
 	int errno = 0;
@@ -1684,7 +1692,10 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 	if (unlikely(!p->signal))
 		return;
 
+	utime = stime = cputime_zero;
+
 	switch (who) {
+		case RUSAGE_BOTH:
 		case RUSAGE_CHILDREN:
 			spin_lock_irqsave(&p->sighand->siglock, flags);
 			utime = p->signal->cutime;
@@ -1694,22 +1705,11 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 			r->ru_minflt = p->signal->cmin_flt;
 			r->ru_majflt = p->signal->cmaj_flt;
 			spin_unlock_irqrestore(&p->sighand->siglock, flags);
-			cputime_to_timeval(utime, &r->ru_utime);
-			cputime_to_timeval(stime, &r->ru_stime);
-			break;
+
+			if (who == RUSAGE_CHILDREN)
+				break;
+
 		case RUSAGE_SELF:
-			spin_lock_irqsave(&p->sighand->siglock, flags);
-			utime = stime = cputime_zero;
-			goto sum_group;
-		case RUSAGE_BOTH:
-			spin_lock_irqsave(&p->sighand->siglock, flags);
-			utime = p->signal->cutime;
-			stime = p->signal->cstime;
-			r->ru_nvcsw = p->signal->cnvcsw;
-			r->ru_nivcsw = p->signal->cnivcsw;
-			r->ru_minflt = p->signal->cmin_flt;
-			r->ru_majflt = p->signal->cmaj_flt;
-		sum_group:
 			utime = cputime_add(utime, p->signal->utime);
 			stime = cputime_add(stime, p->signal->stime);
 			r->ru_nvcsw += p->signal->nvcsw;
@@ -1726,13 +1726,14 @@ static void k_getrusage(struct task_struct *p, int who, struct rusage *r)
 				r->ru_majflt += t->maj_flt;
 				t = next_thread(t);
 			} while (t != p);
-			spin_unlock_irqrestore(&p->sighand->siglock, flags);
-			cputime_to_timeval(utime, &r->ru_utime);
-			cputime_to_timeval(stime, &r->ru_stime);
 			break;
+
 		default:
 			BUG();
 	}
+
+	cputime_to_timeval(utime, &r->ru_utime);
+	cputime_to_timeval(stime, &r->ru_stime);
 }
 
 int getrusage(struct task_struct *p, int who, struct rusage __user *ru)