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Subject[PATCH 3/8] net: Decouple HK_FLAG_WQ and HK_FLAG_DOMAIN cpumask fetch
Date
To prepare for supporting each feature of the housekeeping cpumask
toward cpuset, prepare each of the HK_FLAG_* entries to move to their
own cpumask with enforcing to fetch them individually. The new
constraint is that multiple HK_FLAG_* entries can't be mixed together
anymore in a single call to housekeeping cpumask().

This will later allow, for example, to runtime modify the cpulist passed
through "isolcpus=", "nohz_full=" and "rcu_nocbs=" kernel boot
parameters.

Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Reviewed-by: Phil Auld <pauld@redhat.com>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juri Lelli <juri.lelli@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Nitesh Lal <nilal@redhat.com>
Cc: Nicolas Saenz <nsaenzju@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Lameter <cl@gentwo.de>
Cc: Tejun Heo <tj@kernel.org>
Cc: Zefan Li <lizefan.x@bytedance.com>
Cc: Alex Belits <abelits@marvell.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
---
net/core/net-sysfs.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 53ea262ecafd..ed8da7b8d35b 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -823,7 +823,7 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue,
{
struct rps_map *old_map, *map;
cpumask_var_t mask;
- int err, cpu, i, hk_flags;
+ int err, cpu, i;
static DEFINE_MUTEX(rps_map_mutex);

if (!capable(CAP_NET_ADMIN))
@@ -839,8 +839,8 @@ static ssize_t store_rps_map(struct netdev_rx_queue *queue,
}

if (!cpumask_empty(mask)) {
- hk_flags = HK_FLAG_DOMAIN | HK_FLAG_WQ;
- cpumask_and(mask, mask, housekeeping_cpumask(hk_flags));
+ cpumask_and(mask, mask, housekeeping_cpumask(HK_FLAG_DOMAIN));
+ cpumask_and(mask, mask, housekeeping_cpumask(HK_FLAG_WQ));
if (cpumask_empty(mask)) {
free_cpumask_var(mask);
return -EINVAL;
--
2.25.1
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