Re: [PATCH RESEND 3/3] mm/zsmalloc: remove get_zspage_mapping()

[Sergey Senozhatsky]

On (24/02/20 11:44), Chengming Zhou wrote:
> From: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>
> 
> Actually we seldom use the class_idx returned from get_zspage_mapping(),
> only the zspage->fullness is useful, just use zspage->fullness to remove
> this helper.
> 
> Note zspage->fullness is not stable outside pool->lock, remove redundant
> "VM_BUG_ON(fullness != ZS_INUSE_RATIO_0)" in async_free_zspage() since
> we already have the same VM_BUG_ON() in __free_zspage(), which is safe to
> access zspage->fullness with pool->lock held.
> 
> Signed-off-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx>

Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>