Let's clean it up a bit, reusing for_each_resource() and avoiding
traversing subtrees we are not interested in.
Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
---
kernel/resource.c | 13 ++++++++-----
1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/kernel/resource.c b/kernel/resource.c
index f57a14617c49..7e59b57afa56 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -1759,10 +1759,9 @@ static int strict_iomem_checks;
*/
bool iomem_is_exclusive(u64 addr)
{
- struct resource *p = &iomem_resource;
- bool err = false;
- loff_t l;
+ bool skip_children = false, err = false;
int size = PAGE_SIZE;
+ struct resource *p;
if (!strict_iomem_checks)
return false;
@@ -1770,15 +1769,19 @@ bool iomem_is_exclusive(u64 addr)
addr = addr & PAGE_MASK;
read_lock(&resource_lock);
- for (p = p->child; p ; p = r_next(NULL, p, &l)) {
+ for_each_resource(&iomem_resource, p, skip_children) {
/*
* We can probably skip the resources without
* IORESOURCE_IO attribute?
*/
if (p->start >= addr + size)
break;
- if (p->end < addr)
+ if (p->end < addr) {
+ skip_children = true;
continue;
+ }
+ skip_children = false;
+
/*
* A resource is exclusive if IORESOURCE_EXCLUSIVE is set
* or CONFIG_IO_STRICT_DEVMEM is enabled and the
--
2.31.1
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