[PATCH 3/3] percpu: little optimization on calculating pcpu_unit_size

[Wei Yang]

pcpu_unit_size exactly equals to ai->unit_size.

This patch assign this value instead of calculating from pcpu_unit_pages. Also
it reorder them to make it looks more friendly to audience.

Signed-off-by: Wei Yang <weiyang@xxxxxxxxxxxxxxxxxx>
---
 mm/percpu.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index 4f710a4f..74677e0 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1300,8 +1300,8 @@ int __init pcpu_setup_first_chunk(const struct pcpu_alloc_info *ai,
 	pcpu_unit_offsets = unit_off;
 
 	/* determine basic parameters */
-	pcpu_unit_pages = ai->unit_size >> PAGE_SHIFT;
-	pcpu_unit_size = pcpu_unit_pages << PAGE_SHIFT;
+	pcpu_unit_size = ai->unit_size;
+	pcpu_unit_pages = pcpu_unit_size >> PAGE_SHIFT;
 	pcpu_atom_size = ai->atom_size;
 	pcpu_chunk_struct_size = sizeof(struct pcpu_chunk) +
 		BITS_TO_LONGS(pcpu_unit_pages) * sizeof(unsigned long);
-- 
1.7.5.4

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