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Subject: [PATCH v2 06/22] x86: Move NUMA_KEEP_MEMINFO and related definition
 to x86-internals
From:   Dan Williams <dan.j.williams@intel.com>
To:     linux-nvdimm@lists.01.org
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        vishal.l.verma@intel.com, ard.biesheuvel@linaro.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        linux-acpi@vger.kernel.org, hch@lst.de, joao.m.martins@oracle.com
Date:   Sun, 12 Jul 2020 09:26:38 -0700
Message-ID: <159457119816.754248.17444705191598115716.stgit@dwillia2-desk3.amr.corp.intel.com>
In-Reply-To: <159457116473.754248.7879464730875147365.stgit@dwillia2-desk3.amr.corp.intel.com>
References: <159457116473.754248.7879464730875147365.stgit@dwillia2-desk3.amr.corp.intel.com>
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x86 is the lone architecture that uses numa_meminfo. Move and rename
NUMA_KEEP_MEMINFO from the core mm/Kconfig to X86_NUMA_KEEP_MEMINFO in
arch/x86/mm/Kconfig. This is in preparation for defining a generic
memblock based implementation of memory_add_physaddr_to_nid() and
phys_to_target_node().

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 arch/x86/Kconfig            |    7 ++++++-
 arch/x86/mm/numa.c          |    2 +-
 arch/x86/mm/numa_internal.h |    7 +++++++
 include/linux/numa.h        |    7 -------
 mm/Kconfig                  |    5 -----
 5 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6a0cc524882d..fc9264ea4041 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1560,6 +1560,11 @@ config NUMA
 
 	  Otherwise, you should say N.
 
+# Keep NUMA mapping infrastructure post-init.
+config X86_NUMA_KEEP_MEMINFO
+	def_bool MEMORY_HOTPLUG
+	depends on NUMA
+
 config AMD_NUMA
 	def_bool y
 	prompt "Old style AMD Opteron NUMA detection"
@@ -1640,7 +1645,7 @@ config X86_PMEM_LEGACY
 	depends on PHYS_ADDR_T_64BIT
 	depends on BLK_DEV
 	select X86_PMEM_LEGACY_DEVICE
-	select NUMA_KEEP_MEMINFO if NUMA
+	select X86_NUMA_KEEP_MEMINFO if NUMA
 	select LIBNVDIMM
 	help
 	  Treat memory marked using the non-standard e820 type of 12 as used
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c
index 44fdf06d497e..311d22cf8ac2 100644
--- a/arch/x86/mm/numa.c
+++ b/arch/x86/mm/numa.c
@@ -893,7 +893,7 @@ EXPORT_SYMBOL(cpumask_of_node);
 
 #endif	/* !CONFIG_DEBUG_PER_CPU_MAPS */
 
-#ifdef CONFIG_NUMA_KEEP_MEMINFO
+#ifdef CONFIG_X86_NUMA_KEEP_MEMINFO
 static int meminfo_to_nid(struct numa_meminfo *mi, u64 start)
 {
 	int i;
diff --git a/arch/x86/mm/numa_internal.h b/arch/x86/mm/numa_internal.h
index 86860f279662..7b843414335f 100644
--- a/arch/x86/mm/numa_internal.h
+++ b/arch/x86/mm/numa_internal.h
@@ -11,6 +11,13 @@ struct numa_memblk {
 	int			nid;
 };
 
+/* optionally keep NUMA memory info available post init */
+#ifdef CONFIG_X86_NUMA_KEEP_MEMINFO
+#define __initdata_or_meminfo
+#else
+#define __initdata_or_meminfo __initdata
+#endif
+
 struct numa_meminfo {
 	int			nr_blks;
 	struct numa_memblk	blk[NR_NODE_MEMBLKS];
diff --git a/include/linux/numa.h b/include/linux/numa.h
index a42df804679e..5d25c5de1322 100644
--- a/include/linux/numa.h
+++ b/include/linux/numa.h
@@ -13,13 +13,6 @@
 
 #define	NUMA_NO_NODE	(-1)
 
-/* optionally keep NUMA memory info available post init */
-#ifdef CONFIG_NUMA_KEEP_MEMINFO
-#define __initdata_or_meminfo
-#else
-#define __initdata_or_meminfo __initdata
-#endif
-
 #ifdef CONFIG_NUMA
 /* Generic implementation available */
 int numa_map_to_online_node(int node);
diff --git a/mm/Kconfig b/mm/Kconfig
index f2104cc0d35c..0051f735ad98 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -139,10 +139,6 @@ config HAVE_FAST_GUP
 config ARCH_KEEP_MEMBLOCK
 	bool
 
-# Keep arch NUMA mapping infrastructure post-init.
-config NUMA_KEEP_MEMINFO
-	bool
-
 config MEMORY_ISOLATION
 	bool
 
@@ -159,7 +155,6 @@ config MEMORY_HOTPLUG
 	depends on SPARSEMEM || X86_64_ACPI_NUMA
 	depends on ARCH_ENABLE_MEMORY_HOTPLUG
 	depends on 64BIT || BROKEN
-	select NUMA_KEEP_MEMINFO if NUMA
 
 config MEMORY_HOTPLUG_SPARSE
 	def_bool y