[RFC][PATCH 05/20] sched: Fixup the scheduler syscalls to deal withpspaces.

[Eric W. Biederman]

The scheduler is controlled by pid, so fix up the guts of it's system
calls to pass the appropriate pspace when looking up tasks by pid.

Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>


---

 kernel/sched.c |    2 +-
 kernel/sys.c   |   14 ++++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

e37379b11b63503c1146cc17cec75c358154a1ec
diff --git a/kernel/sched.c b/kernel/sched.c
index 6579d49..449cc6e 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3701,7 +3701,7 @@ task_t *idle_task(int cpu)
  */
 static inline task_t *find_process_by_pid(pid_t pid)
 {
-	return pid ? find_task_by_pid(pid) : current;
+	return pid ? find_task_by_pid(current->pspace, pid) : current;
 }
 
 /* Actually do priority change: must hold rq lock. */
diff --git a/kernel/sys.c b/kernel/sys.c
index dc8cb58..bd594c3 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -264,6 +264,7 @@ out:
 
 asmlinkage long sys_setpriority(int which, int who, int niceval)
 {
+	struct pspace *pspace = current->pspace;
 	struct task_struct *g, *p;
 	struct user_struct *user;
 	int error = -EINVAL;
@@ -283,16 +284,16 @@ asmlinkage long sys_setpriority(int whic
 		case PRIO_PROCESS:
 			if (!who)
 				who = current->pid;
-			p = find_task_by_pid(who);
+			p = find_task_by_pid(pspace, who);
 			if (p)
 				error = set_one_prio(p, niceval, error);
 			break;
 		case PRIO_PGRP:
 			if (!who)
 				who = process_group(current);
-			do_each_task_pid(who, PIDTYPE_PGID, p) {
+			do_each_task_pid(pspace, who, PIDTYPE_PGID, p) {
 				error = set_one_prio(p, niceval, error);
-			} while_each_task_pid(who, PIDTYPE_PGID, p);
+			} while_each_task_pid(pspace, who, PIDTYPE_PGID, p);
 			break;
 		case PRIO_USER:
 			user = current->user;
@@ -324,6 +325,7 @@ out:
  */
 asmlinkage long sys_getpriority(int which, int who)
 {
+	struct pspace *pspace = current->pspace;
 	struct task_struct *g, *p;
 	struct user_struct *user;
 	long niceval, retval = -ESRCH;
@@ -336,7 +338,7 @@ asmlinkage long sys_getpriority(int whic
 		case PRIO_PROCESS:
 			if (!who)
 				who = current->pid;
-			p = find_task_by_pid(who);
+			p = find_task_by_pid(pspace, who);
 			if (p) {
 				niceval = 20 - task_nice(p);
 				if (niceval > retval)
@@ -346,11 +348,11 @@ asmlinkage long sys_getpriority(int whic
 		case PRIO_PGRP:
 			if (!who)
 				who = process_group(current);
-			do_each_task_pid(who, PIDTYPE_PGID, p) {
+			do_each_task_pid(pspace, who, PIDTYPE_PGID, p) {
 				niceval = 20 - task_nice(p);
 				if (niceval > retval)
 					retval = niceval;
-			} while_each_task_pid(who, PIDTYPE_PGID, p);
+			} while_each_task_pid(pspace, who, PIDTYPE_PGID, p);
 			break;
 		case PRIO_USER:
 			user = current->user;
-- 
1.1.5.g3480

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