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Subject: [External]  [RFC PATCH v1 2/6] mm/page_alloc.c: get pfn range with
 flags of memblock
Thread-Topic: [External]  [RFC PATCH v1 2/6] mm/page_alloc.c: get pfn range
 with flags of memblock
Thread-Index: AQHT5nLwVHl4qe8WykyzbX8ZVhdgSqQlHIMA
Date:   Tue, 8 May 2018 02:32:47 +0000
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This is used to expand the interface of get_pfn_range_for_nid with
flags of memblock, so mm can get pfn range with special flags.

Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Signed-off-by: Ocean He <hehy1@lenovo.com>
---
 include/linux/mm.h |  4 ++++
 mm/page_alloc.c    | 17 ++++++++++++++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ad06d42..8abf9c9 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2046,6 +2046,10 @@ extern unsigned long absent_pages_in_range(unsigned =
long start_pfn,
 						unsigned long end_pfn);
 extern void get_pfn_range_for_nid(unsigned int nid,
 			unsigned long *start_pfn, unsigned long *end_pfn);
+extern void get_pfn_range_for_nid_with_flags(unsigned int nid,
+					     unsigned long *start_pfn,
+					     unsigned long *end_pfn,
+					     unsigned long flags);
 extern unsigned long find_min_pfn_with_active_regions(void);
 extern void free_bootmem_with_active_regions(int nid,
 						unsigned long max_low_pfn);
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 1741dd2..266c065 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5705,13 +5705,28 @@ void __init sparse_memory_present_with_active_regio=
ns(int nid)
 void __meminit get_pfn_range_for_nid(unsigned int nid,
 			unsigned long *start_pfn, unsigned long *end_pfn)
 {
+	get_pfn_range_for_nid_with_flags(nid, start_pfn, end_pfn,
+					 MEMBLOCK_MAX_TYPE);
+}
+
+/*
+ * If MAX_NUMNODES, includes all node memmory regions.
+ * If MEMBLOCK_MAX_TYPE, includes all memory regions with or without Flags=
.
+ */
+
+void __meminit get_pfn_range_for_nid_with_flags(unsigned int nid,
+						unsigned long *start_pfn,
+						unsigned long *end_pfn,
+						unsigned long flags)
+{
 	unsigned long this_start_pfn, this_end_pfn;
 	int i;
=20
 	*start_pfn =3D -1UL;
 	*end_pfn =3D 0;
=20
-	for_each_mem_pfn_range(i, nid, &this_start_pfn, &this_end_pfn, NULL) {
+	for_each_mem_pfn_range_with_flags(i, nid, &this_start_pfn,
+					  &this_end_pfn, NULL, flags) {
 		*start_pfn =3D min(*start_pfn, this_start_pfn);
 		*end_pfn =3D max(*end_pfn, this_end_pfn);
 	}
--=20
1.8.3.1