+ mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch added to -mm tree

+ mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/vmalloc: use free_vm_area() if an allocation fails
has been added to the -mm tree.  Its filename is
     mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch

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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@gmail.com>
Subject: mm/vmalloc: use free_vm_area() if an allocation fails

There is a dedicated and separate function that finds and removes a
continuous kernel virtual area.  As a final step it also releases the
"area", a descriptor of corresponding vm_struct.

Use free_vmap_area() in the __vmalloc_node_range() instead of open coded
steps which are exactly the same, to perform a cleanup.

Link: https://lkml.kernel.org/r/20201116220033.1837-1-urezki@gmail.com
Signed-off-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Cc: Hillf Danton <hdanton@sina.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@sonymobile.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/vmalloc.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/mm/vmalloc.c~mm-vmalloc-use-free_vm_area-if-an-allocation-fails
+++ a/mm/vmalloc.c
@@ -2479,8 +2479,7 @@ static void *__vmalloc_area_node(struct
 	}
 
 	if (!pages) {
-		remove_vm_area(area->addr);
-		kfree(area);
+		free_vm_area(area);
 		return NULL;
 	}
 
_

Patches currently in -mm which might be from urezki@gmail.com are

mm-vmalloc-use-free_vm_area-if-an-allocation-fails.patch
mm-vmalloc-rework-the-drain-logic.patch