The patch titled
Subject: mm/vmalloc: extend __find_vmap_area() with one more argument
has been added to the -mm mm-unstable branch. Its filename is
mm-vmalloc-extend-__find_vmap_area-with-one-more-argument.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-vmalloc-extend-__find_vmap_area-with-one-more-argument.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: "Uladzislau Rezki (Sony)" <urezki@xxxxxxxxx>
Subject: mm/vmalloc: extend __find_vmap_area() with one more argument
Date: Tue, 7 Jun 2022 11:34:48 +0200
__find_vmap_area() finds a "vmap_area" based on passed address. It scan
the specific "vmap_area_root" rb-tree. Extend the function with one extra
argument, so any tree can be specified where the search has to be done.
There is no functional change as a result of this patch.
Link: https://lkml.kernel.org/r/20220607093449.3100-5-urezki@xxxxxxxxx
Signed-off-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Nicholas Piggin <npiggin@xxxxxxxxx>
Cc: Oleksiy Avramchenko <oleksiy.avramchenko@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/vmalloc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-extend-__find_vmap_area-with-one-more-argument
+++ a/mm/vmalloc.c
@@ -815,9 +815,9 @@ static struct vmap_area *find_vmap_area_
return va;
}
-static struct vmap_area *__find_vmap_area(unsigned long addr)
+static struct vmap_area *__find_vmap_area(unsigned long addr, struct rb_root *root)
{
- struct rb_node *n = vmap_area_root.rb_node;
+ struct rb_node *n = root->rb_node;
addr = (unsigned long)kasan_reset_tag((void *)addr);
@@ -1834,7 +1834,7 @@ static struct vmap_area *find_vmap_area(
struct vmap_area *va;
spin_lock(&vmap_area_lock);
- va = __find_vmap_area(addr);
+ va = __find_vmap_area(addr, &vmap_area_root);
spin_unlock(&vmap_area_lock);
return va;
@@ -2576,7 +2576,7 @@ struct vm_struct *remove_vm_area(const v
might_sleep();
spin_lock(&vmap_area_lock);
- va = __find_vmap_area((unsigned long)addr);
+ va = __find_vmap_area((unsigned long)addr, &vmap_area_root);
if (va && va->vm) {
struct vm_struct *vm = va->vm;
_
Patches currently in -mm which might be from urezki@xxxxxxxxx are
mm-vmalloc-make-link_va-unlink_va-common-to-different-rb_root.patch
mm-vmalloc-extend-__alloc_vmap_area-with-extra-arguments.patch
mm-vmalloc-initialize-vas-list-node-after-unlink.patch
mm-vmalloc-extend-__find_vmap_area-with-one-more-argument.patch
lib-test_vmalloc-switch-to-prandom_u32.patch
