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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

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Linux-nvdimm@lists.01.org
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WARNING: multiple messages have this Message-ID (diff)
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


WARNING: multiple messages have this Message-ID (diff)
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
To: dan.j.williams@intel.com
Cc: linux-nvdimm@lists.01.org, linux-mm@kvack.org,
	linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
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


             reply	other threads:[~2019-05-14  2:55 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-14  2:55 Aneesh Kumar K.V [this message]
2019-05-14  2:55 ` [PATCH] mm/nvdimm: Use correct alignment when looking at first pfn from a region Aneesh Kumar K.V
2019-05-14  2:55 ` Aneesh Kumar K.V
2019-05-14  4:29 ` Dan Williams
2019-05-14  4:29   ` Dan Williams
2019-05-14  4:29   ` Dan Williams
2019-05-14  4:41   ` Aneesh Kumar K.V
2019-05-14  4:41     ` Aneesh Kumar K.V
2019-05-14  4:41     ` Aneesh Kumar K.V
2019-05-27  9:35     ` Aneesh Kumar K.V
2019-05-27  9:35       ` Aneesh Kumar K.V
2019-05-27  9:35       ` Aneesh Kumar K.V

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