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Message-Id: <20181015175702.9036-3-logang@deltatee.com>
Date: Mon, 15 Oct 2018 11:56:58 -0600
From: Logan Gunthorpe <logang@...tatee.com>
To: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-riscv@...ts.infradead.org,
linux-arm-kernel@...ts.infradead.org, linux-sh@...r.kernel.org
Cc: Stephen Bates <sbates@...thlin.com>,
Palmer Dabbelt <palmer@...ive.com>,
Albert Ou <aou@...s.berkeley.edu>,
Christoph Hellwig <hch@....de>,
Andrew Morton <akpm@...ux-foundation.org>,
Arnd Bergmann <arnd@...db.de>,
Logan Gunthorpe <logang@...tatee.com>,
Michal Hocko <mhocko@...e.com>,
Vlastimil Babka <vbabka@...e.cz>,
Pavel Tatashin <pasha.tatashin@...cle.com>,
Oscar Salvador <osalvador@...e.de>
Subject: [PATCH v2 2/6] mm/sparse: add common helper to mark all memblocks present
Presently the arches arm64, arm and sh have a function which loops through
each memblock and calls memory present. riscv will require a similar
function.
Introduce a common memblocks_present() function that can be used by
all the arches. Subsequent patches will cleanup the arches that
make use of this.
Signed-off-by: Logan Gunthorpe <logang@...tatee.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Michal Hocko <mhocko@...e.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Pavel Tatashin <pasha.tatashin@...cle.com>
Cc: Oscar Salvador <osalvador@...e.de>
---
include/linux/mmzone.h | 6 ++++++
mm/sparse.c | 14 ++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index d4b0c79d2924..26a026a45857 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -784,6 +784,12 @@ void memory_present(int nid, unsigned long start, unsigned long end);
static inline void memory_present(int nid, unsigned long start, unsigned long end) {}
#endif
+#if defined(CONFIG_SPARSEMEM) && defined(CONFIG_HAVE_MEMBLOCK)
+void memblocks_present(void);
+#else
+static inline void memblocks_present(void) {}
+#endif
+
#ifdef CONFIG_HAVE_MEMORYLESS_NODES
int local_memory_node(int node_id);
#else
diff --git a/mm/sparse.c b/mm/sparse.c
index 10b07eea9a6e..90aec8331a03 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -5,6 +5,7 @@
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/mmzone.h>
+#include <linux/memblock.h>
#include <linux/bootmem.h>
#include <linux/compiler.h>
#include <linux/highmem.h>
@@ -238,6 +239,19 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
}
}
+#ifdef CONFIG_HAVE_MEMBLOCK
+void __init memblocks_present(void)
+{
+ struct memblock_region *reg;
+
+ for_each_memblock(memory, reg) {
+ memory_present(memblock_get_region_node(reg),
+ memblock_region_memory_base_pfn(reg),
+ memblock_region_memory_end_pfn(reg));
+ }
+}
+#endif
+
/*
* Subtle, we encode the real pfn into the mem_map such that
* the identity pfn - section_mem_map will return the actual
--
2.19.0
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