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authorSteven Rostedt <rostedt@goodmis.org>2005-07-25 16:28:39 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-07-26 15:40:00 -0700
commitd46523ea32a79fbc8cd1237f9441f45cc3f02456 (patch)
tree0afe4590170ad25e38005f72431680ba47ba6860
parent18586e721636527cb5177467fb17e2350615978a (diff)
[PATCH] fix MAX_USER_RT_PRIO and MAX_RT_PRIO
Here's the patch again to fix the code to handle if the values between MAX_USER_RT_PRIO and MAX_RT_PRIO are different. Without this patch, an SMP system will crash if the values are different. Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/ia64/sn/kernel/xpc_main.c2
-rw-r--r--kernel/sched.c5
2 files changed, 4 insertions, 3 deletions
diff --git a/arch/ia64/sn/kernel/xpc_main.c b/arch/ia64/sn/kernel/xpc_main.c
index d580adcad92..bb1d5cf3044 100644
--- a/arch/ia64/sn/kernel/xpc_main.c
+++ b/arch/ia64/sn/kernel/xpc_main.c
@@ -420,7 +420,7 @@ xpc_activating(void *__partid)
partid_t partid = (u64) __partid;
struct xpc_partition *part = &xpc_partitions[partid];
unsigned long irq_flags;
- struct sched_param param = { sched_priority: MAX_USER_RT_PRIO - 1 };
+ struct sched_param param = { sched_priority: MAX_RT_PRIO - 1 };
int ret;
diff --git a/kernel/sched.c b/kernel/sched.c
index a5fb654ea59..a646e4f36c4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3486,7 +3486,7 @@ static void __setscheduler(struct task_struct *p, int policy, int prio)
p->policy = policy;
p->rt_priority = prio;
if (policy != SCHED_NORMAL)
- p->prio = MAX_USER_RT_PRIO-1 - p->rt_priority;
+ p->prio = MAX_RT_PRIO-1 - p->rt_priority;
else
p->prio = p->static_prio;
}
@@ -3518,7 +3518,8 @@ recheck:
* 1..MAX_USER_RT_PRIO-1, valid priority for SCHED_NORMAL is 0.
*/
if (param->sched_priority < 0 ||
- param->sched_priority > MAX_USER_RT_PRIO-1)
+ (p->mm && param->sched_priority > MAX_USER_RT_PRIO-1) ||
+ (!p->mm && param->sched_priority > MAX_RT_PRIO-1))
return -EINVAL;
if ((policy == SCHED_NORMAL) != (param->sched_priority == 0))
return -EINVAL;