[PATCH 15/22] mm: document maple tree pointer at unmap_vmas() at memory.c

[Mauro Carvalho Chehab]

A maple tree pointer parameter was added at unmap_vmas() without
description:

	mm/memory.c:1729: warning: Function parameter or member 'mt' not described in 'unmap_vmas'

Document it it.

Fixes: 5966e5c968b2 ("mm: remove the vma linked list")
Fixes: f8acc5e9581e ("Maple Tree: add new data structure")
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxx>
---

To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH 00/22] at: https://lore.kernel.org/all/cover.1656409369.git.mchehab@xxxxxxxxxx/

 mm/memory.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/memory.c b/mm/memory.c
index e3d3596068f2..771b61444507 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1707,6 +1707,8 @@ static void unmap_single_vma(struct mmu_gather *tlb,
 /**
  * unmap_vmas - unmap a range of memory covered by a list of vma's
  * @tlb: address of the caller's struct mmu_gather
+ * @mt: maple tree pointer. A maple tree is a RCU-safe range based B-tree
+ *	designed to use modern processor cache efficiently
  * @vma: the starting vma
  * @start_addr: virtual address at which to start unmapping
  * @end_addr: virtual address at which to end unmapping
-- 
2.36.1