memblock: allow to specify flags with memblock_add_node()

We want to specify flags when hotplugging memory.  Let's prepare to pass
flags to memblock_add_node() by adjusting all existing users.

Note that when hotplugging memory the system is already up and running
and we might have concurrent memblock users: for example, while we're
hotplugging memory, kexec_file code might search for suitable memory
regions to place kexec images.  It's important to add the memory
directly to memblock via a single call with the right flags, instead of
adding the memory first and apply flags later: otherwise, concurrent
memblock users might temporarily stumble over memblocks with wrong
flags, which will be important in a follow-up patch that introduces a
new flag to properly handle add_memory_driver_managed().

Link: https://lkml.kernel.org/r/20211004093605.5830-4-david@redhat.com
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Acked-by: Shahab Vahedi <shahab@synopsys.com>	[arch/arc]
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Jianyong Wu <Jianyong.Wu@arm.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Vineet Gupta <vgupta@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

8 files changed, 17 insertions, 10 deletions

diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 59408f6a02d4..ce4e939a7f07 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -59,13 +59,13 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 
 		low_mem_sz = size;
 		in_use = 1;
-		memblock_add_node(base, size, 0);
+		memblock_add_node(base, size, 0, MEMBLOCK_NONE);
 	} else {
 #ifdef CONFIG_HIGHMEM
 		high_mem_start = base;
 		high_mem_sz = size;
 		in_use = 1;
-		memblock_add_node(base, size, 1);
+		memblock_add_node(base, size, 1, MEMBLOCK_NONE);
 		memblock_reserve(base, size);
 #endif
 	}
diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c
index 42e025cfbd08..24901d809301 100644
--- a/arch/ia64/mm/contig.c
+++ b/arch/ia64/mm/contig.c
@@ -153,7 +153,7 @@ find_memory (void)
 	efi_memmap_walk(find_max_min_low_pfn, NULL);
 	max_pfn = max_low_pfn;
 
-	memblock_add_node(0, PFN_PHYS(max_low_pfn), 0);
+	memblock_add_node(0, PFN_PHYS(max_low_pfn), 0, MEMBLOCK_NONE);
 
 	find_initrd();
 
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 5c6da8d83c1a..5d165607bf35 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -378,7 +378,7 @@ int __init register_active_ranges(u64 start, u64 len, int nid)
 #endif
 
 	if (start < end)
-		memblock_add_node(__pa(start), end - start, nid);
+		memblock_add_node(__pa(start), end - start, nid, MEMBLOCK_NONE);
 	return 0;
 }
 
diff --git a/arch/m68k/mm/mcfmmu.c b/arch/m68k/mm/mcfmmu.c
index eac9dde65193..6f1f25125294 100644
--- a/arch/m68k/mm/mcfmmu.c
+++ b/arch/m68k/mm/mcfmmu.c
@@ -174,7 +174,8 @@ void __init cf_bootmem_alloc(void)
 	m68k_memory[0].addr = _rambase;
 	m68k_memory[0].size = _ramend - _rambase;
 
-	memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0);
+	memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0,
+			  MEMBLOCK_NONE);
 
 	/* compute total pages in system */
 	num_pages = PFN_DOWN(_ramend - _rambase);
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index 9f3f77785aa7..2b05bb2bac00 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -410,7 +410,8 @@ void __init paging_init(void)
 
 	min_addr = m68k_memory[0].addr;
 	max_addr = min_addr + m68k_memory[0].size;
-	memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0);
+	memblock_add_node(m68k_memory[0].addr, m68k_memory[0].size, 0,
+			  MEMBLOCK_NONE);
 	for (i = 1; i < m68k_num_memory;) {
 		if (m68k_memory[i].addr < min_addr) {
 			printk("Ignoring memory chunk at 0x%lx:0x%lx before the first chunk\n",
@@ -421,7 +422,8 @@ void __init paging_init(void)
 				(m68k_num_memory - i) * sizeof(struct m68k_mem_info));
 			continue;
 		}
-		memblock_add_node(m68k_memory[i].addr, m68k_memory[i].size, i);
+		memblock_add_node(m68k_memory[i].addr, m68k_memory[i].size, i,
+				  MEMBLOCK_NONE);
 		addr = m68k_memory[i].addr + m68k_memory[i].size;
 		if (addr > max_addr)
 			max_addr = addr;
diff --git a/arch/mips/loongson64/init.c b/arch/mips/loongson64/init.c
index 76e0a9636a0e..4ac5ba80bbf6 100644
--- a/arch/mips/loongson64/init.c
+++ b/arch/mips/loongson64/init.c
@@ -77,7 +77,9 @@ void __init szmem(unsigned int node)
 				(u32)node_id, mem_type, mem_start, mem_size);
 			pr_info("       start_pfn:0x%llx, end_pfn:0x%llx, num_physpages:0x%lx\n",
 				start_pfn, end_pfn, num_physpages);
-			memblock_add_node(PFN_PHYS(start_pfn), PFN_PHYS(node_psize), node);
+			memblock_add_node(PFN_PHYS(start_pfn),
+					  PFN_PHYS(node_psize), node,
+					  MEMBLOCK_NONE);
 			break;
 		case SYSTEM_RAM_RESERVED:
 			pr_info("Node%d: mem_type:%d, mem_start:0x%llx, mem_size:0x%llx MB\n",
diff --git a/arch/mips/sgi-ip27/ip27-memory.c b/arch/mips/sgi-ip27/ip27-memory.c
index 6173684b5aaa..adc2faeecf7c 100644
--- a/arch/mips/sgi-ip27/ip27-memory.c
+++ b/arch/mips/sgi-ip27/ip27-memory.c
@@ -341,7 +341,8 @@ static void __init szmem(void)
 				continue;
 			}
 			memblock_add_node(PFN_PHYS(slot_getbasepfn(node, slot)),
-					  PFN_PHYS(slot_psize), node);
+					  PFN_PHYS(slot_psize), node,
+					  MEMBLOCK_NONE);
 		}
 	}
 }
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 7fc836e9e194..8a378d426239 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -593,7 +593,8 @@ static void __init setup_resources(void)
 	 * part of the System RAM resource.
 	 */
 	if (crashk_res.end) {
-		memblock_add_node(crashk_res.start, resource_size(&crashk_res), 0);
+		memblock_add_node(crashk_res.start, resource_size(&crashk_res),
+				  0, MEMBLOCK_NONE);
 		memblock_reserve(crashk_res.start, resource_size(&crashk_res));
 		insert_resource(&iomem_resource, &crashk_res);
 	}