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From: Logan Gunthorpe <logang@deltatee.com>
To: linux-kernel@vger.kernel.org, linux-mm@kvack.org,
	linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, linux-sh@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
	Palmer Dabbelt <palmer@sifive.com>,
	Stephen Bates <sbates@raithlin.com>,
	Michal Hocko <mhocko@suse.com>,
	Logan Gunthorpe <logang@deltatee.com>,
	Christoph Hellwig <hch@lst.de>, Vlastimil Babka <vbabka@suse.cz>,
	Oscar Salvador <osalvador@suse.de>
Subject: [PATCH 2/2] mm/sparse: add common helper to mark all memblocks present
Date: Wed,  7 Nov 2018 10:38:59 -0700
Message-ID: <20181107173859.24096-3-logang@deltatee.com> (raw)
Message-ID: <20181107173859.LyfuWHh5xKMe1mFc7hFUjBo1o5bmopWKgVoI7SQoSgc@z> (raw)
In-Reply-To: <20181107173859.24096-1-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: Oscar Salvador <osalvador@suse.de>
---
 include/linux/mmzone.h |  6 ++++++
 mm/sparse.c            | 11 +++++++++++
 2 files changed, 17 insertions(+)

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 847705a6d0ec..db023a92f3a4 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -783,6 +783,12 @@ 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)
+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 33307fc05c4d..5841e4ad6d93 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -239,6 +239,17 @@ void __init memory_present(int nid, unsigned long start, unsigned long end)
 	}
 }
 
+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));
+	}
+}
+
 /*
  * 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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Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-07 17:38 [PATCH 0/2] Introduce common code for risc-v sparsemem support logang
2018-11-07 17:38 ` Logan Gunthorpe
2018-11-07 17:38 ` [PATCH 1/2] mm: Introduce common STRUCT_PAGE_MAX_SHIFT define logang
2018-11-07 17:38   ` Logan Gunthorpe
2018-11-07 20:11   ` akpm
2018-11-07 20:11     ` Andrew Morton
2018-11-07 17:38 ` logang [this message]
2018-11-07 17:38   ` [PATCH 2/2] mm/sparse: add common helper to mark all memblocks present Logan Gunthorpe
2018-11-07 20:12   ` akpm
2018-11-07 20:12     ` Andrew Morton
2018-11-07 20:19     ` logang
2018-11-07 20:19       ` Logan Gunthorpe
2018-11-07 20:26       ` tglx
2018-11-07 20:26         ` Thomas Gleixner
2018-11-07 20:36         ` logang
2018-11-07 20:36           ` Logan Gunthorpe
2018-11-07 20:38           ` akpm
2018-11-07 20:38             ` Andrew Morton
2018-11-07 20:56             ` tglx
2018-11-07 20:56               ` Thomas Gleixner
2018-12-06 17:40     ` Logan Gunthorpe
2018-12-07 19:56       ` Andrew Morton

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