linux-kernel - [PATCH] mm: fix some comments in page

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Date:   Sat, 26 Sep 2020 00:06:50 +0800
From:   Hui Su <sh_def@....com>
To:     lizefan@...wei.com, tj@...nel.org, hannes@...xchg.org,
        akpm@...ux-foundation.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: [PATCH] mm: fix some comments in page_alloc.c and mempolicy.c

1. the cpuset.c has been moved from kernel/cpuset.c to
kernel/cgroup/cpuset.c long time ago, but the comment is stale,
so we update it.
2. get_page_from_freelist() may alloc many pages according to
order, we may use pages for better.

Signed-off-by: Hui Su <sh_def@....com>
---
 kernel/cgroup/cpuset.c | 2 +-
 mm/mempolicy.c         | 2 +-
 mm/page_alloc.c        | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 642415b8c3c9..1d3011c1aab6 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -1,5 +1,5 @@
 /*
- *  kernel/cpuset.c
+ *  kernel/cgroup/cpuset.c
  *
  *  Processor and Memory placement constraints for sets of tasks.
  *
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index eddbe4e56c73..ac59b049b16c 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -2295,7 +2295,7 @@ int vma_dup_policy(struct vm_area_struct *src, struct vm_area_struct *dst)
  * rebinds the mempolicy its copying by calling mpol_rebind_policy()
  * with the mems_allowed returned by cpuset_mems_allowed().  This
  * keeps mempolicies cpuset relative after its cpuset moves.  See
- * further kernel/cpuset.c update_nodemask().
+ * further kernel/cgroup/cpuset.c update_nodemask().
  *
  * current's mempolicy may be rebinded by the other task(the task that changes
  * cpuset's mems), so we needn't do rebind work for current task.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index fab5e97dc9ca..1e3c7493e1cb 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3709,7 +3709,7 @@ static inline unsigned int current_alloc_flags(gfp_t gfp_mask,
 
 /*
  * get_page_from_freelist goes through the zonelist trying to allocate
- * a page.
+ * pages.
  */
 static struct page *
 get_page_from_freelist(gfp_t gfp_mask, unsigned int order, int alloc_flags,
@@ -3723,7 +3723,7 @@ get_page_from_freelist(gfp_t gfp_mask, unsigned int order, int alloc_flags,
 retry:
 	/*
 	 * Scan zonelist, looking for a zone with enough free.
-	 * See also __cpuset_node_allowed() comment in kernel/cpuset.c.
+	 * See also __cpuset_node_allowed() comment in kernel/cgroup/cpuset.c.
 	 */
 	no_fallback = alloc_flags & ALLOC_NOFRAGMENT;
 	z = ac->preferred_zoneref;
-- 
2.25.1