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Message-Id: <20220607093449.3100-5-urezki@gmail.com>
Date: Tue, 7 Jun 2022 11:34:48 +0200
From: "Uladzislau Rezki (Sony)" <urezki@...il.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-mm@...ck.org, LKML <linux-kernel@...r.kernel.org>,
Christoph Hellwig <hch@...radead.org>,
Matthew Wilcox <willy@...radead.org>,
Nicholas Piggin <npiggin@...il.com>,
Uladzislau Rezki <urezki@...il.com>,
Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>
Subject: [PATCH 4/5] mm/vmalloc: Extend __find_vmap_area() with one more argument
__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.
Signed-off-by: Uladzislau Rezki (Sony) <urezki@...il.com>
---
mm/vmalloc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 82771e555273..b60385101897 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -814,9 +814,9 @@ static struct vmap_area *find_vmap_area_exceed_addr(unsigned long addr)
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);
@@ -1840,7 +1840,7 @@ static struct vmap_area *find_vmap_area(unsigned long addr)
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;
@@ -2582,7 +2582,7 @@ struct vm_struct *remove_vm_area(const void *addr)
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;
--
2.30.2
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