From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
linux-nvdimm@lists.01.org
Subject: [PATCH] mm/nvdimm: Use correct alignment when looking at first pfn from a region
Date: Tue, 14 May 2019 08:25:12 +0530 [thread overview]
Message-ID: <20190514025512.9670-1-aneesh.kumar@linux.ibm.com> (raw)
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@linux.ibm.com>
---
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
next reply other threads:[~2019-05-14 2:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-14 2:55 Aneesh Kumar K.V [this message]
2019-05-14 4:29 ` [PATCH] mm/nvdimm: Use correct alignment when looking at first pfn from a region Dan Williams
2019-05-14 4:41 ` Aneesh Kumar K.V
2019-05-27 9:35 ` Aneesh Kumar K.V
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