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| author | Wei Yang <richard.weiyang@gmail.com> | 2017-03-14 11:08:01 +0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-04-03 11:54:37 +0200 |
| commit | 474aeffd88b87746a75583f356183d5c6caa4213 (patch) | |
| tree | 9b1b66516861433610d8da6f17060e254d12bd69 /arch/x86/mm | |
| parent | 43dac8f6a74c9811454f4efbe52b48f7a802c277 (diff) | |
x86/mm/numa: Remove numa_nodemask_from_meminfo()
numa_nodemask_from_meminfo() generates a nodemask of nodes which have
memory according to a meminfo descriptor.
The two callsites of that function both set bits in copies of the
numa_nodes_parsed nodemask. In both cases, the information in supplied
numa_meminfo is a subset of numa_nodes_parsed. So setting those bits
again is not really necessary.
Here are the three call paths which show that the supplied numa_meminfo
argument describes memory regions in nodes which are already in
numa_nodes_parsed:
x86_numa_init()
numa_init()
Case 1:
acpi_numa_init()
acpi_parse_memory_affinity()
numa_add_memblk()
node_set(numa_nodes_parsed)
acpi_parse_slit()
acpi_numa_slit_init()
numa_set_distance()
numa_alloc_distance()
numa_nodemask_from_meminfo()
Case 2:
amd_numa_init()
numa_add_memblk()
node_set(numa_nodes_parsed)
Case 3
dummy_numa_init()
node_set(numa_nodes_parsed)
numa_add_memblk()
numa_register_memblks()
numa_nodemask_from_meminfo()
Thus, in all three cases, the respective bit in numa_nodes_parsed is
set, which means it is not necessary to set it again in a copy of
numa_nodes_parsed.
So remove that function.
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/20170314030801.13656-2-richard.weiyang@gmail.com
[ Heavily massage commit message. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm')
| -rw-r--r-- | arch/x86/mm/numa.c | 21 |
1 files changed, 1 insertions, 20 deletions
diff --git a/arch/x86/mm/numa.c b/arch/x86/mm/numa.c index 93671d8b3b0d..175f54ac6772 100644 --- a/arch/x86/mm/numa.c +++ b/arch/x86/mm/numa.c @@ -314,20 +314,6 @@ int __init numa_cleanup_meminfo(struct numa_meminfo *mi) return 0; } -/* - * Set nodes, which have memory in @mi, in *@nodemask. - */ -static void __init numa_nodemask_from_meminfo(nodemask_t *nodemask, - const struct numa_meminfo *mi) -{ - int i; - - for (i = 0; i < ARRAY_SIZE(mi->blk); i++) - if (mi->blk[i].start != mi->blk[i].end && - mi->blk[i].nid != NUMA_NO_NODE) - node_set(mi->blk[i].nid, *nodemask); -} - /** * numa_reset_distance - Reset NUMA distance table * @@ -347,16 +333,12 @@ void __init numa_reset_distance(void) static int __init numa_alloc_distance(void) { - nodemask_t nodes_parsed; size_t size; int i, j, cnt = 0; u64 phys; /* size the new table and allocate it */ - nodes_parsed = numa_nodes_parsed; - numa_nodemask_from_meminfo(&nodes_parsed, &numa_meminfo); - - for_each_node_mask(i, nodes_parsed) + for_each_node_mask(i, numa_nodes_parsed) cnt = i; cnt++; size = cnt * cnt * sizeof(numa_distance[0]); @@ -535,7 +517,6 @@ static int __init numa_register_memblks(struct numa_meminfo *mi) /* Account for nodes with cpus and no memory */ node_possible_map = numa_nodes_parsed; - numa_nodemask_from_meminfo(&node_possible_map, mi); if (WARN_ON(nodes_empty(node_possible_map))) return -EINVAL; |