[PATCH] cgroup: Fix typo in comments and documents

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Fix typo: iff  ==> if

Signed-off-by: Cai Huoqing <caihuoqing@xxxxxxxxx>
---
 Documentation/admin-guide/cgroup-v1/cgroups.rst           | 2 +-
 Documentation/admin-guide/cgroup-v1/freezer-subsystem.rst | 4 ++--
 kernel/cgroup/cgroup-v1.c                                 | 4 ++--
 kernel/cgroup/cgroup.c                                    | 6 +++---
 kernel/cgroup/cpuset.c                                    | 4 ++--
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/Documentation/admin-guide/cgroup-v1/cgroups.rst b/Documentation/admin-guide/cgroup-v1/cgroups.rst
index b0688011ed06..fa747466e304 100644
--- a/Documentation/admin-guide/cgroup-v1/cgroups.rst
+++ b/Documentation/admin-guide/cgroup-v1/cgroups.rst
@@ -573,7 +573,7 @@ cgroup_for_each_descendant_pre() for details.
 ``void css_offline(struct cgroup *cgrp);``
 (cgroup_mutex held by caller)
 
-This is the counterpart of css_online() and called iff css_online()
+This is the counterpart of css_online() and called if css_online()
 has succeeded on @cgrp. This signifies the beginning of the end of
 @cgrp. @cgrp is being removed and the subsystem should start dropping
 all references it's holding on @cgrp. When all references are dropped,
diff --git a/Documentation/admin-guide/cgroup-v1/freezer-subsystem.rst b/Documentation/admin-guide/cgroup-v1/freezer-subsystem.rst
index 582d3427de3f..a908c5226bde 100644
--- a/Documentation/admin-guide/cgroup-v1/freezer-subsystem.rst
+++ b/Documentation/admin-guide/cgroup-v1/freezer-subsystem.rst
@@ -56,7 +56,7 @@ expected.
 The cgroup freezer is hierarchical. Freezing a cgroup freezes all
 tasks belonging to the cgroup and all its descendant cgroups. Each
 cgroup has its own state (self-state) and the state inherited from the
-parent (parent-state). Iff both states are THAWED, the cgroup is
+parent (parent-state). If both states are THAWED, the cgroup is
 THAWED.
 
 The following cgroupfs files are created by cgroup freezer.
@@ -87,7 +87,7 @@ The following cgroupfs files are created by cgroup freezer.
 * freezer.self_freezing: Read only.
 
   Shows the self-state. 0 if the self-state is THAWED; otherwise, 1.
-  This value is 1 iff the last write to freezer.state was "FROZEN".
+  This value is 1 if the last write to freezer.state was "FROZEN".
 
 * freezer.parent_freezing: Read only.
 
diff --git a/kernel/cgroup/cgroup-v1.c b/kernel/cgroup/cgroup-v1.c
index de2c432dee20..71d2b46d1968 100644
--- a/kernel/cgroup/cgroup-v1.c
+++ b/kernel/cgroup/cgroup-v1.c
@@ -120,7 +120,7 @@ int cgroup_transfer_tasks(struct cgroup *to, struct cgroup *from)
 		goto out_err;
 
 	/*
-	 * Migrate tasks one-by-one until @from is empty.  This fails iff
+	 * Migrate tasks one-by-one until @from is empty.  This fails if
 	 * ->can_attach() fails.
 	 */
 	do {
@@ -215,7 +215,7 @@ static void cgroup_pidlist_destroy_work_fn(struct work_struct *work)
 	mutex_lock(&l->owner->pidlist_mutex);
 
 	/*
-	 * Destroy iff we didn't get queued again.  The state won't change
+	 * Destroy if we didn't get queued again.  The state won't change
 	 * as destroy_dwork can only be queued while locked.
 	 */
 	if (!delayed_work_pending(dwork)) {
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c
index 3a0161c21b6b..b831554372a2 100644
--- a/kernel/cgroup/cgroup.c
+++ b/kernel/cgroup/cgroup.c
@@ -793,7 +793,7 @@ static bool css_set_populated(struct css_set *cset)
  * One of the css_sets associated with @cgrp is either getting its first
  * task or losing the last.  Update @cgrp->nr_populated_* accordingly.  The
  * count is propagated towards root so that a given cgroup's
- * nr_populated_children is zero iff none of its descendants contain any
+ * nr_populated_children is zero if none of its descendants contain any
  * tasks.
  *
  * @cgrp's interface file "cgroup.populated" is zero if both
@@ -2410,7 +2410,7 @@ struct task_struct *cgroup_taskset_next(struct cgroup_taskset *tset,
  * @mgctx: migration context
  *
  * Migrate tasks in @mgctx as setup by migration preparation functions.
- * This function fails iff one of the ->can_attach callbacks fails and
+ * This function fails if one of the ->can_attach callbacks fails and
  * guarantees that either all or none of the tasks in @mgctx are migrated.
  * @mgctx is consumed regardless of success.
  */
@@ -4264,7 +4264,7 @@ struct cgroup_subsys_state *css_next_child(struct cgroup_subsys_state *pos,
 	 * increasing unique serial number and always appended to the
 	 * sibling list, the next one can be found by walking the parent's
 	 * children until the first css with higher serial number than
-	 * @pos's.  While this path can be slower, it happens iff iteration
+	 * @pos's.  While this path can be slower, it happens if iteration
 	 * races against release and the race window is very small.
 	 */
 	if (!pos) {
diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index adb5190c4429..f09fc0347550 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -782,7 +782,7 @@ static int generate_sched_domains(cpumask_var_t **domains,
 		if (cp == &top_cpuset)
 			continue;
 		/*
-		 * Continue traversing beyond @cp iff @cp has some CPUs and
+		 * Continue traversing beyond @cp if @cp has some CPUs and
 		 * isn't load balancing.  The former is obvious.  The
 		 * latter: All child cpusets contain a subset of the
 		 * parent's cpus, so just skip them, and then we call
@@ -1801,7 +1801,7 @@ static int update_nodemask(struct cpuset *cs, struct cpuset *trialcs,
 	}
 
 	/*
-	 * An empty mems_allowed is ok iff there are no tasks in the cpuset.
+	 * An empty mems_allowed is ok if there are no tasks in the cpuset.
 	 * Since nodelist_parse() fails on an empty mask, we special case
 	 * that parsing.  The validate_change() call ensures that cpusets
 	 * with tasks have memory.
-- 
2.25.1




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