Merge branch 'for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
Pull percpu updates from Dennis Zhou:
"There are 2 minor changes to the percpu allocator this merge window:
- for loop condition that could be out of bounds on multi-socket UP
- cosmetic removal of pcpu_group_offsets[0] in UP code as it is 0
There has been an interest in having better alignment with percpu
allocations. This has caused a performance regression in at least one
reported workload. I have a series out which adds scan hints to the
allocator as well as some other performance oriented changes. I hope
to have this queued for v5.2 soon"
* 'for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
percpu: km: no need to consider pcpu_group_offsets[0]
percpu: use nr_groups as check condition
diff --git a/mm/percpu-km.c b/mm/percpu-km.c
index 0f643dc..b68d5df 100644
--- a/mm/percpu-km.c
+++ b/mm/percpu-km.c
@@ -67,7 +67,7 @@ static struct pcpu_chunk *pcpu_create_chunk(gfp_t gfp)
pcpu_set_page_chunk(nth_page(pages, i), chunk);
chunk->data = pages;
- chunk->base_addr = page_address(pages) - pcpu_group_offsets[0];
+ chunk->base_addr = page_address(pages);
spin_lock_irqsave(&pcpu_lock, flags);
pcpu_chunk_populated(chunk, 0, nr_pages, false);
diff --git a/mm/percpu.c b/mm/percpu.c
index db86282..c5c7507 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -2384,7 +2384,7 @@ static struct pcpu_alloc_info * __init pcpu_build_alloc_info(
ai->atom_size = atom_size;
ai->alloc_size = alloc_size;
- for (group = 0, unit = 0; group_cnt[group]; group++) {
+ for (group = 0, unit = 0; group < nr_groups; group++) {
struct pcpu_group_info *gi = &ai->groups[group];
/*