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net: use %*pb[l] to print bitmaps including cpumasks and nodemasks

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printk and friends can now format bitmaps using '%*pb[l]'.  cpumask
and nodemask also provide cpumask_pr_args() and nodemask_pr_args()
respectively which can be used to generate the two printf arguments
necessary to format the specified cpu/nodemask.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tejun Heo 2015-02-13 14:37:42 -08:00 committed by Linus Torvalds
parent 1a40243bae
commit f09068276c
2 changed files with 8 additions and 22 deletions
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28
net/core/net-sysfs.c
View File

@ -614,8 +614,7 @@ static ssize_t show_rps_map(struct netdev_rx_queue *queue,
{
struct rps_map *map;
cpumask_var_t mask;
size_t len = 0;
int i;
int i, len;
if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
@ -626,17 +625,11 @@ static ssize_t show_rps_map(struct netdev_rx_queue *queue,
for (i = 0; i < map->len; i++)
cpumask_set_cpu(map->cpus[i], mask);
len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
if (PAGE_SIZE - len < 3) {
rcu_read_unlock();
free_cpumask_var(mask);
return -EINVAL;
}
len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
rcu_read_unlock();
free_cpumask_var(mask);
len += sprintf(buf + len, "\n");
return len;
return len < PAGE_SIZE ? len : -EINVAL;
}
static ssize_t store_rps_map(struct netdev_rx_queue *queue,
@ -1090,8 +1083,7 @@ static ssize_t show_xps_map(struct netdev_queue *queue,
struct xps_dev_maps *dev_maps;
cpumask_var_t mask;
unsigned long index;
size_t len = 0;
int i;
int i, len;
if (!zalloc_cpumask_var(&mask, GFP_KERNEL))
return -ENOMEM;
@ -1117,15 +1109,9 @@ static ssize_t show_xps_map(struct netdev_queue *queue,
}
rcu_read_unlock();
len += cpumask_scnprintf(buf + len, PAGE_SIZE, mask);
if (PAGE_SIZE - len < 3) {
free_cpumask_var(mask);
return -EINVAL;
}
len = snprintf(buf, PAGE_SIZE, "%*pb\n", cpumask_pr_args(mask));
free_cpumask_var(mask);
len += sprintf(buf + len, "\n");
return len;
return len < PAGE_SIZE ? len : -EINVAL;
}
static ssize_t store_xps_map(struct netdev_queue *queue,

2
net/core/sysctl_net_core.c
View File

@ -155,7 +155,7 @@ static int flow_limit_cpu_sysctl(struct ctl_table *table, int write,
rcu_read_unlock();
len = min(sizeof(kbuf) - 1, *lenp);
len = cpumask_scnprintf(kbuf, len, mask);
len = scnprintf(kbuf, len, "%*pb", cpumask_pr_args(mask));
if (!len) {
*lenp = 0;
goto done;