[079/227] mm/memory.c: use helper macro min and max in unmap_mapping_range_tree()

Commit Message

Andrew Morton March 22, 2022, 9:42 p.m. UTC

From: Miaohe Lin <[e-mail]>
Subject: mm/memory.c: 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.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Miaohe Lin <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

 mm/memory.c |    8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)

Patch

--- a/mm/memory.c~mm-use-helper-macro-min-and-max-in-unmap_mapping_range_tree
+++ a/mm/memory.c
@@ -3350,12 +3350,8 @@  static inline void unmap_mapping_range_t
 	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,