We already add the start_pad to the resource->start but fails to section
align the start. This make sure with altmap we compute the right first
pfn when start_pad is zero and we are doing an align down of start address.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
---
kernel/memremap.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/memremap.c b/kernel/memremap.c
index a856cb5ff192..23d77b60e728 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -59,9 +59,9 @@ static unsigned long pfn_first(struct dev_pagemap *pgmap)
{
const struct resource *res = &pgmap->res;
struct vmem_altmap *altmap = &pgmap->altmap;
- unsigned long pfn;
+ unsigned long pfn = PHYS_PFN(res->start);
- pfn = res->start >> PAGE_SHIFT;
+ pfn = SECTION_ALIGN_DOWN(pfn);
if (pgmap->altmap_valid)
pfn += vmem_altmap_offset(altmap);
return pfn;
--
2.21.0
