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Subject[PATCH] zsmalloc: use copy_page for full page copy
Date
Some architectures have implemented optimized
copy_page for full page copying, such as arm.

On my arm platform, use the copy_page helper
for single page copying is about 10 percent faster
than memcpy.

Signed-off-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
---
mm/zsmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index c743ce7a5f49..b1c0dad7f4cf 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1839,7 +1839,7 @@ static int zs_page_migrate(struct page *newpage, struct page *page,
* Here, any user cannot access all objects in the zspage so let's move.
*/
d_addr = kmap_atomic(newpage);
- memcpy(d_addr, s_addr, PAGE_SIZE);
+ copy_page(d_addr, s_addr);
kunmap_atomic(d_addr);

for (addr = s_addr + offset; addr < s_addr + PAGE_SIZE;
--
2.18.0
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