diff options
author | Waiman Long <longman@redhat.com> | 2021-07-20 17:18:26 +0300 |
---|---|---|
committer | Tejun Heo <tj@kernel.org> | 2021-07-27 01:56:29 +0300 |
commit | 0f3adb8a1e5f36e792598c1d77a2cfac9c90a4f9 (patch) | |
tree | 08f1c31278925f8293c1a713d93dc7251088d961 /kernel/cgroup/cpuset.c | |
parent | 1f8c543f142942a2325e729fc4c64b6898749c3a (diff) | |
download | linux-0f3adb8a1e5f36e792598c1d77a2cfac9c90a4f9.tar.xz |
cgroup/cpuset: Miscellaneous code cleanup
Use more descriptive variable names for update_prstate(), remove
unnecessary code and fix some typos. There is no functional change.
Signed-off-by: Waiman Long <longman@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'kernel/cgroup/cpuset.c')
-rw-r--r-- | kernel/cgroup/cpuset.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c index adb5190c4429..f5fef5516d99 100644 --- a/kernel/cgroup/cpuset.c +++ b/kernel/cgroup/cpuset.c @@ -1114,7 +1114,7 @@ enum subparts_cmd { * cpus_allowed can be granted or an error code will be returned. * * For partcmd_disable, the cpuset is being transofrmed from a partition - * root back to a non-partition root. any CPUs in cpus_allowed that are in + * root back to a non-partition root. Any CPUs in cpus_allowed that are in * parent's subparts_cpus will be taken away from that cpumask and put back * into parent's effective_cpus. 0 should always be returned. * @@ -1225,7 +1225,7 @@ static int update_parent_subparts_cpumask(struct cpuset *cpuset, int cmd, /* * partcmd_update w/o newmask: * - * addmask = cpus_allowed & parent->effectiveb_cpus + * addmask = cpus_allowed & parent->effective_cpus * * Note that parent's subparts_cpus may have been * pre-shrunk in case there is a change in the cpu list. @@ -1365,12 +1365,12 @@ static void update_cpumasks_hier(struct cpuset *cs, struct tmpmasks *tmp) case PRS_DISABLED: /* * If parent is not a partition root or an - * invalid partition root, clear the state - * state and the CS_CPU_EXCLUSIVE flag. + * invalid partition root, clear its state + * and its CS_CPU_EXCLUSIVE flag. */ WARN_ON_ONCE(cp->partition_root_state != PRS_ERROR); - cp->partition_root_state = 0; + cp->partition_root_state = PRS_DISABLED; /* * clear_bit() is an atomic operation and @@ -1937,30 +1937,28 @@ out: /* * update_prstate - update partititon_root_state - * cs: the cpuset to update - * val: 0 - disabled, 1 - enabled + * cs: the cpuset to update + * new_prs: new partition root state * * Call with cpuset_mutex held. */ -static int update_prstate(struct cpuset *cs, int val) +static int update_prstate(struct cpuset *cs, int new_prs) { int err; struct cpuset *parent = parent_cs(cs); - struct tmpmasks tmp; + struct tmpmasks tmpmask; - if ((val != 0) && (val != 1)) - return -EINVAL; - if (val == cs->partition_root_state) + if (new_prs == cs->partition_root_state) return 0; /* * Cannot force a partial or invalid partition root to a full * partition root. */ - if (val && cs->partition_root_state) + if (new_prs && (cs->partition_root_state < 0)) return -EINVAL; - if (alloc_cpumasks(NULL, &tmp)) + if (alloc_cpumasks(NULL, &tmpmask)) return -ENOMEM; err = -EINVAL; @@ -1978,7 +1976,7 @@ static int update_prstate(struct cpuset *cs, int val) goto out; err = update_parent_subparts_cpumask(cs, partcmd_enable, - NULL, &tmp); + NULL, &tmpmask); if (err) { update_flag(CS_CPU_EXCLUSIVE, cs, 0); goto out; @@ -1990,18 +1988,18 @@ static int update_prstate(struct cpuset *cs, int val) * CS_CPU_EXCLUSIVE bit. */ if (cs->partition_root_state == PRS_ERROR) { - cs->partition_root_state = 0; + cs->partition_root_state = PRS_DISABLED; update_flag(CS_CPU_EXCLUSIVE, cs, 0); err = 0; goto out; } err = update_parent_subparts_cpumask(cs, partcmd_disable, - NULL, &tmp); + NULL, &tmpmask); if (err) goto out; - cs->partition_root_state = 0; + cs->partition_root_state = PRS_DISABLED; /* Turning off CS_CPU_EXCLUSIVE will not return error */ update_flag(CS_CPU_EXCLUSIVE, cs, 0); @@ -2015,11 +2013,11 @@ static int update_prstate(struct cpuset *cs, int val) update_tasks_cpumask(parent); if (parent->child_ecpus_count) - update_sibling_cpumasks(parent, cs, &tmp); + update_sibling_cpumasks(parent, cs, &tmpmask); rebuild_sched_domains_locked(); out: - free_cpumasks(NULL, &tmp); + free_cpumasks(NULL, &tmpmask); return err; } @@ -3060,7 +3058,7 @@ retry: goto retry; } - parent = parent_cs(cs); + parent = parent_cs(cs); compute_effective_cpumask(&new_cpus, cs, parent); nodes_and(new_mems, cs->mems_allowed, parent->effective_mems); |