+ tools-vm-page_owner_sortc-avoid-repeated-judgments.patch added to -mm tree

+ tools-vm-page_owner_sortc-avoid-repeated-judgments.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: tools/vm/page_owner_sort.c: avoid repeated judgments
has been added to the -mm tree.  Its filename is
     tools-vm-page_owner_sortc-avoid-repeated-judgments.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/tools-vm-page_owner_sortc-avoid-repeated-judgments.patch

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------------------------------------------------------
From: Yixuan Cao <caoyixuan2019@email.szu.edu.cn>
Subject: tools/vm/page_owner_sort.c: avoid repeated judgments

I noticed a detail that needs to be adjusted.  When judging whether a page
is allocated by vmalloc, the value of the variable "tmp" was repeatedly
judged, so the code was adjusted.

This work is coauthored by Yinan Zhang, Jiajian Ye, Shenghong Han, Chongxi
Zhao, Yuhong Feng and Yongqiang Liu.

Link: https://lkml.kernel.org/r/20220414042744.13896-1-caoyixuan2019@email.szu.edu.cn
Signed-off-by: Yixuan Cao <caoyixuan2019@email.szu.edu.cn>
Cc: Chongxi Zhao <zhaochongxi2019@email.szu.edu.cn>
Cc: Haowen Bai <baihaowen@meizu.com>
Cc: Jiajian Ye <yejiajian2018@email.szu.edu.cn>
Cc: Sean Anderson <seanga2@gmail.com>
Cc: Shenghong Han <hanshenghong2019@email.szu.edu.cn>
Cc: Yinan Zhang <zhangyinan2019@email.szu.edu.cn>
Cc: Yongqiang Liu <liuyongqiang13@huawei.com>
Cc: Yuhong Feng <yuhongf@szu.edu.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---


--- a/tools/vm/page_owner_sort.c~tools-vm-page_owner_sortc-avoid-repeated-judgments
+++ a/tools/vm/page_owner_sort.c
@@ -444,10 +444,8 @@ static int get_allocator(const char *buf
 			tmp--;
 		first_line = ++tmp;
 		tmp = strstr(tmp, "alloc_pages");
-		if (tmp) {
-			if (tmp && first_line <= tmp && tmp < second_line)
-				allocator |= ALLOCATOR_VMALLOC;
-		}
+		if (tmp && first_line <= tmp && tmp < second_line)
+			allocator |= ALLOCATOR_VMALLOC;
 	}
 	if (allocator == 0)
 		allocator = ALLOCATOR_OTHERS;
_

Patches currently in -mm which might be from caoyixuan2019@email.szu.edu.cn are

tools-vm-page_owner_sortc-provide-allocator-labelling-and-update-cull-and-sort-options.patch
tools-vm-page_owner_sortc-avoid-repeated-judgments.patch
mm-vmalloc-fix-a-comment.patch