[PATCH 3/5] mm/vmalloc.c: correct lazy_max_pages() return value

[zijun_hu]

From: zijun_hu <zijun_hu@xxxxxxx>

correct lazy_max_pages() return value if the number of online
CPUs is power of 2

Signed-off-by: zijun_hu <zijun_hu@xxxxxxx>
---
 mm/vmalloc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index a125ae8..2804224 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -594,7 +594,9 @@ static unsigned long lazy_max_pages(void)
 {
 	unsigned int log;
 
-	log = fls(num_online_cpus());
+	log = num_online_cpus();
+	if (log > 1)
+		log = (unsigned int)get_count_order(log);
 
 	return log * (32UL * 1024 * 1024 / PAGE_SIZE);
 }
-- 
1.9.1