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From: Logan Gunthorpe <logang@deltatee.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-riscv@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, linux-sh@vger.kernel.org
Cc: Stephen Bates <sbates@raithlin.com>,
	Palmer Dabbelt <palmer@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>, Christoph Hellwig <hch@lst.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Logan Gunthorpe <logang@deltatee.com>,
	Michal Hocko <mhocko@suse.com>, Vlastimil Babka <vbabka@suse.cz>,
	Pavel Tatashin <pasha.tatashin@oracle.com>,
	Oscar Salvador <osalvador@suse.de>
Subject: [PATCH v2 2/6] mm/sparse: add common helper to mark all memblocks present
Date: Mon, 15 Oct 2018 11:56:58 -0600	[thread overview]
Message-ID: <20181015175702.9036-3-logang@deltatee.com> (raw)
In-Reply-To: <20181015175702.9036-1-logang@deltatee.com>

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@deltatee.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Oscar Salvador <osalvador@suse.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


  parent reply	other threads:[~2018-10-15 17:59 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-15 17:56 [PATCH v2 0/6] sparsemem support for RISC-V Logan Gunthorpe
2018-10-15 17:56 ` [PATCH v2 1/6] mm: Introduce common STRUCT_PAGE_MAX_SHIFT define Logan Gunthorpe
2018-10-29 17:53   ` Will Deacon
2018-10-15 17:56 ` Logan Gunthorpe [this message]
2018-10-15 17:56 ` [PATCH v2 3/6] ARM: mm: make use of new memblocks_present() helper Logan Gunthorpe
2018-10-15 17:57 ` [PATCH v2 4/6] arm64: " Logan Gunthorpe
2018-10-15 17:57 ` [PATCH v2 5/6] sh: " Logan Gunthorpe
2018-10-15 17:57 ` [PATCH v2 6/6] RISC-V: Implement sparsemem Logan Gunthorpe
2018-12-17 14:59   ` Nick Kossifidis
2018-12-17 16:50     ` Logan Gunthorpe
2018-10-16  0:04 ` [PATCH v2 0/6] sparsemem support for RISC-V Palmer Dabbelt

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