The patch titled
Subject: mm/mmap: not necessary to check mapping separately
has been removed from the -mm tree. Its filename was
mm-mmap-not-necessary-to-check-mapping-separately.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Subject: mm/mmap: not necessary to check mapping separately
*root* with type of struct rb_root_cached is an element of *mapping*
with type of struct address_space. This implies when we have a valid
*root* it must be a part of valid *mapping*.
So we can merge these two checks together to make the code more easy to
read and to save some cpu cycles.
Link: https://lkml.kernel.org/r/20200913133631.37781-1-richard.weiyang@xxxxxxxxxxxxxxxxx
Signed-off-by: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/mmap.c~mm-mmap-not-necessary-to-check-mapping-separately
+++ a/mm/mmap.c
@@ -895,10 +895,9 @@ again:
anon_vma_interval_tree_post_update_vma(next);
anon_vma_unlock_write(anon_vma);
}
- if (mapping)
- i_mmap_unlock_write(mapping);
if (root) {
+ i_mmap_unlock_write(mapping);
uprobe_mmap(vma);
if (adjust_next)
_
Patches currently in -mm which might be from richard.weiyang@xxxxxxxxxxxxxxxxx are
mm-page_reporting-drop-stale-list-head-check-in-page_reporting_cycle.patch
bitops-simplify-get_count_order_long.patch
bitops-use-the-same-mechanism-for-get_count_order.patch
