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authorLinus Torvalds <torvalds@linux-foundation.org>2010-03-26 15:09:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-26 15:09:59 -0700
commit3cacf42462c8c97e045a07a5fc92aa357489c8b5 (patch)
tree32ed28929899a93c2a3cf9ba5d051d01ed798a7d /kernel
parent6fa41366c1c5e8b9640baba22d2b90ec9035a889 (diff)
parent8bc037fb89bb3104b9ae290d18c877624cd7d9cc (diff)
Merge branch 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'sched-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: sched: Use proper type in sched_getaffinity() kernel/sched.c: Suppress unused var warning sched: sched_getaffinity(): Allow less than NR_CPUS length
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 9ab3cd7858d..49d2fa7b687 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2650,7 +2650,7 @@ void wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
{
unsigned long flags;
struct rq *rq;
- int cpu = get_cpu();
+ int cpu __maybe_unused = get_cpu();
#ifdef CONFIG_SMP
/*
@@ -4902,7 +4902,9 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
int ret;
cpumask_var_t mask;
- if (len < cpumask_size())
+ if (len < nr_cpu_ids)
+ return -EINVAL;
+ if (len & (sizeof(unsigned long)-1))
return -EINVAL;
if (!alloc_cpumask_var(&mask, GFP_KERNEL))
@@ -4910,10 +4912,12 @@ SYSCALL_DEFINE3(sched_getaffinity, pid_t, pid, unsigned int, len,
ret = sched_getaffinity(pid, mask);
if (ret == 0) {
- if (copy_to_user(user_mask_ptr, mask, cpumask_size()))
+ size_t retlen = min_t(size_t, len, cpumask_size());
+
+ if (copy_to_user(user_mask_ptr, mask, retlen))
ret = -EFAULT;
else
- ret = cpumask_size();
+ ret = retlen;
}
free_cpumask_var(mask);