printk and friends can now formap 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.
This patch is dependent on the following two patches.
lib/vsprintf: implement bitmap printing through '%*pb[l]'
cpumask, nodemask: implement cpumask/nodemask_pr_args()
Please wait till the forementioned patches are merged to mainline
before applying to subsystem trees.
Signed-off-by: Tejun Heo <t...@kernel.org>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: "David S. Miller" <da...@davemloft.net>
---
net/core/net-sysfs.c | 28 +++++++---------------------
net/core/sysctl_net_core.c | 2 +-
2 files changed, 8 insertions(+), 22 deletions(-)
diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 9993412..f2aa73b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -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,
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 31baba2..453ada1 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -155,7 +155,7 @@ write_unlock:
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;
--
2.1.0
--
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