Re: [PATCH] rdma: siw: remove unused variable

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-----"Anders Roxell" <anders.roxell@xxxxxxxxxx> wrote: -----

>To: bmt@xxxxxxxxxxxxxx, dledford@xxxxxxxxxx, jgg@xxxxxxxx
>From: "Anders Roxell" <anders.roxell@xxxxxxxxxx>
>Date: 07/26/2019 11:26AM
>Cc: linux-rdma@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, "Anders
>Roxell" <anders.roxell@xxxxxxxxxx>
>Subject: [EXTERNAL] [PATCH] rdma: siw: remove unused variable
>
>The variable 'p' si no longer used and the compiler rightly complains
>that it should be removed.
>
>../drivers/infiniband/sw/siw/siw_mem.c: In function ‘siw_free_plist’:
>../drivers/infiniband/sw/siw/siw_mem.c:66:16: warning: unused
>variable
> ‘p’ [-Wunused-variable]
>  struct page **p = chunk->plist;
>                ^
>
>Rework to remove unused variable.
>
>Fixes: 8288d030447f ("mm/gup: add make_dirty arg to
>put_user_pages_dirty_lock()")
>Signed-off-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
>---
> drivers/infiniband/sw/siw/siw_mem.c | 2 --
> 1 file changed, 2 deletions(-)
>
>diff --git a/drivers/infiniband/sw/siw/siw_mem.c
>b/drivers/infiniband/sw/siw/siw_mem.c
>index 358d440efa11..ab83a9cec562 100644
>--- a/drivers/infiniband/sw/siw/siw_mem.c
>+++ b/drivers/infiniband/sw/siw/siw_mem.c
>@@ -63,8 +63,6 @@ struct siw_mem *siw_mem_id2obj(struct siw_device
>*sdev, int stag_index)
> static void siw_free_plist(struct siw_page_chunk *chunk, int
>num_pages,
> 			   bool dirty)
> {
>-	struct page **p = chunk->plist;
>-
> 	put_user_pages_dirty_lock(chunk->plist, num_pages, dirty);
> }
> 
>-- 
>2.20.1
>
>

If we can cut down siw_free_plist() to just calling
put_user_pages_dirty_lock(), we shall better call it directly
and not obfuscate that by another function. 

Reviewed-by: Bernard Metzler <bmt@xxxxxxxxxxxxxx>




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