[094/200] mm/vmalloc: use free_vm_area() if an allocation fails

Commit Message

Andrew Morton Dec. 15, 2020, 3:08 a.m. UTC

From: "Uladzislau Rezki (Sony)" <[e-mail]>
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/[e-mail]
Signed-off-by: Uladzislau Rezki (Sony) <[e-mail]>
Cc: Hillf Danton <[e-mail]>
Cc: Matthew Wilcox <[e-mail]>
Cc: Michal Hocko <[e-mail]>
Cc: Oleksiy Avramchenko <[e-mail]>
Cc: Minchan Kim <[e-mail]>
Cc: Steven Rostedt <[e-mail]>
Cc: "Huang, Ying" <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
---

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

Patch

--- 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;
 	}