+ mm-page_alloc-use-clamp-to-simplify-code.patch added to -mm tree

+ mm-page_alloc-use-clamp-to-simplify-code.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/page_alloc: use clamp() to simplify code
has been added to the -mm tree.  Its filename is
     mm-page_alloc-use-clamp-to-simplify-code.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-page_alloc-use-clamp-to-simplify-code.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-page_alloc-use-clamp-to-simplify-code.patch

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------------------------------------------------------
From: Wang ShaoBo <bobo.shaobowang@huawei.com>
Subject: mm/page_alloc: use clamp() to simplify code

This patch uses clamp() to simplify code in init_per_zone_wmark_min().

Link: https://lkml.kernel.org/r/20211021034830.1049150-1-bobo.shaobowang@huawei.com
Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Wei Yongjun <weiyongjun1@huawei.com>
Cc: Li Bin <huawei.libin@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/page_alloc.c |   12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

--- a/mm/page_alloc.c~mm-page_alloc-use-clamp-to-simplify-code
+++ a/mm/page_alloc.c
@@ -8477,16 +8477,12 @@ int __meminit init_per_zone_wmark_min(vo
 	lowmem_kbytes = nr_free_buffer_pages() * (PAGE_SIZE >> 10);
 	new_min_free_kbytes = int_sqrt(lowmem_kbytes * 16);
 
-	if (new_min_free_kbytes > user_min_free_kbytes) {
-		min_free_kbytes = new_min_free_kbytes;
-		if (min_free_kbytes < 128)
-			min_free_kbytes = 128;
-		if (min_free_kbytes > 262144)
-			min_free_kbytes = 262144;
-	} else {
+	if (new_min_free_kbytes > user_min_free_kbytes)
+		min_free_kbytes = clamp(new_min_free_kbytes, 128, 262144);
+	else
 		pr_warn("min_free_kbytes is not updated to %d because user defined value %d is preferred\n",
 				new_min_free_kbytes, user_min_free_kbytes);
-	}
+
 	setup_per_zone_wmarks();
 	refresh_zone_stat_thresholds();
 	setup_per_zone_lowmem_reserve();
_

Patches currently in -mm which might be from bobo.shaobowang@huawei.com are

mm-page_alloc-use-clamp-to-simplify-code.patch