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memblock: fix validation of NUMA coverage

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To check for unset node ID for a range memblock_validate_numa_coverage()
 was checking for NUMA_NO_NODE, but x86 used MAX_NUMNODES when no node ID
 was specified by buggy firmware.
 
 Update memblock to substitute MAX_NUMNODES with NUMA_NO_NODE in
 memblock_set_node() and use NUMA_NO_NODE in x86::numa_init().
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Merge tag 'fixes-2024-06-13' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock

Pull memblock fixes from Mike Rapoport:
 "Fix validation of NUMA coverage.

  memblock_validate_numa_coverage() was checking for a unset node ID
  using NUMA_NO_NODE, but x86 used MAX_NUMNODES when no node ID was
  specified by buggy firmware.

  Update memblock to substitute MAX_NUMNODES with NUMA_NO_NODE in
  memblock_set_node() and use NUMA_NO_NODE in x86::numa_init()"

* tag 'fixes-2024-06-13' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock:
  x86/mm/numa: Use NUMA_NO_NODE when calling memblock_set_node()
  memblock: make memblock_set_node() also warn about use of MAX_NUMNODES
This commit is contained in:
Linus Torvalds 2024-06-13 10:09:29 -07:00
commit 3572597ca8
2 changed files with 7 additions and 3 deletions
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6
arch/x86/mm/numa.c
View File

@ -493,7 +493,7 @@ static void __init numa_clear_kernel_node_hotplug(void)
for_each_reserved_mem_region(mb_region) {
int nid = memblock_get_region_node(mb_region);
if (nid != MAX_NUMNODES)
if (nid != NUMA_NO_NODE)
node_set(nid, reserved_nodemask);
}
@ -614,9 +614,9 @@ static int __init numa_init(int (*init_func)(void))
nodes_clear(node_online_map);
memset(&numa_meminfo, 0, sizeof(numa_meminfo));
WARN_ON(memblock_set_node(0, ULLONG_MAX, &memblock.memory,
MAX_NUMNODES));
NUMA_NO_NODE));
WARN_ON(memblock_set_node(0, ULLONG_MAX, &memblock.reserved,
MAX_NUMNODES));
NUMA_NO_NODE));
/* In case that parsing SRAT failed. */
WARN_ON(memblock_clear_hotplug(0, ULLONG_MAX));
numa_reset_distance();

4
mm/memblock.c
View File

@ -1339,6 +1339,10 @@ int __init_memblock memblock_set_node(phys_addr_t base, phys_addr_t size,
int start_rgn, end_rgn;
int i, ret;
if (WARN_ONCE(nid == MAX_NUMNODES,
"Usage of MAX_NUMNODES is deprecated. Use NUMA_NO_NODE instead\n"))
nid = NUMA_NO_NODE;
ret = memblock_isolate_range(type, base, size, &start_rgn, &end_rgn);
if (ret)
return ret;