kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
For registering in add_del_listener(), when kmalloc_node() fails, need return -ENOMEM instead of success code, and cmd_attr_register_cpumask() wants to know about it. After modification, give a simple common test "build -> boot up -> kernel/controllers/cgroup/getdelays by LTP tools". Signed-off-by: Chen Gang <gang.chen@asianux.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -290,6 +290,7 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
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struct listener_list *listeners;
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struct listener_list *listeners;
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struct listener *s, *tmp, *s2;
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struct listener *s, *tmp, *s2;
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unsigned int cpu;
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unsigned int cpu;
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int ret = 0;
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if (!cpumask_subset(mask, cpu_possible_mask))
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if (!cpumask_subset(mask, cpu_possible_mask))
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return -EINVAL;
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return -EINVAL;
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@ -304,9 +305,10 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
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for_each_cpu(cpu, mask) {
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for_each_cpu(cpu, mask) {
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s = kmalloc_node(sizeof(struct listener),
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s = kmalloc_node(sizeof(struct listener),
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GFP_KERNEL, cpu_to_node(cpu));
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GFP_KERNEL, cpu_to_node(cpu));
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if (!s)
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if (!s) {
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ret = -ENOMEM;
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goto cleanup;
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goto cleanup;
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}
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s->pid = pid;
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s->pid = pid;
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s->valid = 1;
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s->valid = 1;
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@ -339,7 +341,7 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
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}
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}
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up_write(&listeners->sem);
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up_write(&listeners->sem);
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}
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}
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return 0;
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return ret;
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}
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}
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static int parse(struct nlattr *na, struct cpumask *mask)
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static int parse(struct nlattr *na, struct cpumask *mask)
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