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Code Issues Releases Wiki Activity

hv_balloon: simplify math in alloc_balloon_pages()

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'alloc_unit' in alloc_balloon_pages() is either '512' for 2M allocations or
'1' for 4k allocations. So

1 << get_order(alloc_unit << PAGE_SHIFT)

equals to 'alloc_unit' and the for loop basically sets all them offline.
Simplify the math to improve the readability.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20201202161245.2406143-2-vkuznets@redhat.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Vitaly Kuznetsov 2020-12-02 17:12:44 +01:00 committed by Wei Liu
parent 5c641fee4c
commit 7f3f227b41
1 changed files with 1 additions and 1 deletions
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2
drivers/hv/hv_balloon.c
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@ -1238,7 +1238,7 @@ static unsigned int alloc_balloon_pages(struct hv_dynmem_device *dm,
split_page(pg, get_order(alloc_unit << PAGE_SHIFT));
/* mark all pages offline */
for (j = 0; j < (1 << get_order(alloc_unit << PAGE_SHIFT)); j++)
for (j = 0; j < alloc_unit; j++)
__SetPageOffline(pg + j);
bl_resp->range_count++;