linux-kernel - [PATCH] mm: use helper macro min and max in unmap_mapping_range

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Date:   Thu, 24 Feb 2022 20:11:34 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH] mm: use helper macro min and max in unmap_mapping_range_tree

Use helper macro min and max to help simplify the code logic. Minor
readability improvement.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/memory.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 47b667f6b600..7d0f80135a41 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -3339,12 +3339,8 @@ static inline void unmap_mapping_range_tree(struct rb_root_cached *root,
 	vma_interval_tree_foreach(vma, root, first_index, last_index) {
 		vba = vma->vm_pgoff;
 		vea = vba + vma_pages(vma) - 1;
-		zba = first_index;
-		if (zba < vba)
-			zba = vba;
-		zea = last_index;
-		if (zea > vea)
-			zea = vea;
+		zba = max(first_index, vba);
+		zea = min(last_index, vea);
 
 		unmap_mapping_range_vma(vma,
 			((zba - vba) << PAGE_SHIFT) + vma->vm_start,
-- 
2.23.0