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>

diff --git a/tools/vm/page_owner_sort.c b/tools/vm/page_owner_sort.c
index fa2e4d2a9d681d652ff9fa26e978f5ffb5e993ed..c149427eb1c9b5d29ae303b6f2927a468079d1e3 100644 (file)
--- a/tools/vm/page_owner_sort.c
+++ b/tools/vm/page_owner_sort.c
@@ -444,10 +444,8 @@ static int get_allocator(const char *buf, const char *migrate_info)
                        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;