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| author | David S. Miller <davem@davemloft.net> | 2011-07-06 08:23:37 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-07-06 08:23:37 +0200 |
| commit | e12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4 (patch) | |
| tree | 83c0e192ccaa4752c80b6131a7d0aa8272b5d0d0 /kernel/taskstats.c | |
| parent | b44: Use pr_<level>_once and DRV_DESCRIPTION (diff) | |
| parent | net: vlan: enable soft features regardless of underlying device (diff) | |
| download | linux-e12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4.tar.xz linux-e12fe68ce34d60c04bb1ddb1d3cc5c3022388fe4.zip | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
Diffstat (limited to 'kernel/taskstats.c')
| -rw-r--r-- | kernel/taskstats.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/taskstats.c b/kernel/taskstats.c index 9ffea360a778..fc0f22005417 100644 --- a/kernel/taskstats.c +++ b/kernel/taskstats.c @@ -285,16 +285,18 @@ ret: static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd) { struct listener_list *listeners; - struct listener *s, *tmp; + struct listener *s, *tmp, *s2; unsigned int cpu; if (!cpumask_subset(mask, cpu_possible_mask)) return -EINVAL; + s = NULL; if (isadd == REGISTER) { for_each_cpu(cpu, mask) { - s = kmalloc_node(sizeof(struct listener), GFP_KERNEL, - cpu_to_node(cpu)); + if (!s) + s = kmalloc_node(sizeof(struct listener), + GFP_KERNEL, cpu_to_node(cpu)); if (!s) goto cleanup; s->pid = pid; @@ -303,9 +305,16 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd) listeners = &per_cpu(listener_array, cpu); down_write(&listeners->sem); + list_for_each_entry_safe(s2, tmp, &listeners->list, list) { + if (s2->pid == pid) + goto next_cpu; + } list_add(&s->list, &listeners->list); + s = NULL; +next_cpu: up_write(&listeners->sem); } + kfree(s); return 0; } |