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x86/mm: Replace nodes_weight() with nodes_empty() where appropriate 

Various mm code calls nodes_weight() to check if any bit of a given
nodemask is set.

This can be done more efficiently with nodes_empty() because nodes_empty()
stops traversing the nodemask as soon as it finds first set bit, while
nodes_weight() counts all bits unconditionally.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20220210224933.379149-26-yury.norov@gmail.com
This commit is contained in:
Yury Norov 2022-02-10 14:49:09 -08:00 committed by Thomas Gleixner
parent 3a5ff1f6dd
commit c2a911d302
2 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/x86/mm/amdtopology.c
View File

@ -154,7 +154,7 @@ int __init amd_numa_init(void)
node_set(nodeid, numa_nodes_parsed);
}
if (!nodes_weight(numa_nodes_parsed))
if (nodes_empty(numa_nodes_parsed))
return -ENOENT;
/*

4
arch/x86/mm/numa_emulation.c
View File

@ -123,7 +123,7 @@ static int __init split_nodes_interleave(struct numa_meminfo *ei,
* Continue to fill physical nodes with fake nodes until there is no
* memory left on any of them.
*/
while (nodes_weight(physnode_mask)) {
while (!nodes_empty(physnode_mask)) {
for_each_node_mask(i, physnode_mask) {
u64 dma32_end = PFN_PHYS(MAX_DMA32_PFN);
u64 start, limit, end;
@ -270,7 +270,7 @@ static int __init split_nodes_size_interleave_uniform(struct numa_meminfo *ei,
* Fill physical nodes with fake nodes of size until there is no memory
* left on any of them.
*/
while (nodes_weight(physnode_mask)) {
while (!nodes_empty(physnode_mask)) {
for_each_node_mask(i, physnode_mask) {
u64 dma32_end = PFN_PHYS(MAX_DMA32_PFN);
u64 start, limit, end;