Re: [Qemu-devel] [PATCH 4/4] block: Remove unused functions

[Max Reitz <mreitz@redhat.com>]

On 2015-02-16 at 16:41, Thomas Huth wrote:
> qemu_try_blockalign0() and nbd_export_close_all() are not
> used anymore and thus can be removed.
>
> Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
> Cc: Kevin Wolf <kwolf@redhat.com>
> Cc: Stefan Hajnoczi <stefanha@redhat.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> ---
>   block.c               |   11 -----------
>   include/block/block.h |    1 -
>   include/block/nbd.h   |    1 -
>   nbd.c                 |    9 ---------
>   4 files changed, 0 insertions(+), 22 deletions(-)

NACK, I'm using nbd_export_close_all() in my "block: Rework 
bdrv_close_all()" series.

I'm not so sure about qemu_try_blockalign0(); it has never been used, 
but I introduced it because we have qemu_blockalign(), 
qemu_try_blockalign(), and qemu_blockalign0() (the latter of which I 
introduced along with qemu_try_blockalign0(), and this function is used).

So I'd be fine with removing qemu_try_blockalign0() again, but I don't 
really see the point in doing so. It is not a function that is per-se 
deprecated or something, quite the opposite, actually. If people can 
make use of that function, they should most certainly do so.

Max

> diff --git a/block.c b/block.c
> index 210fd5f..2128f82 100644
> --- a/block.c
> +++ b/block.c
> @@ -5335,17 +5335,6 @@ void *qemu_try_blockalign(BlockDriverState *bs, size_t size)
>       return qemu_try_memalign(align, size);
>   }
>   
> -void *qemu_try_blockalign0(BlockDriverState *bs, size_t size)
> -{
> -    void *mem = qemu_try_blockalign(bs, size);
> -
> -    if (mem) {
> -        memset(mem, 0, size);
> -    }
> -
> -    return mem;
> -}
> -
>   /*
>    * Check if all memory in this vector is sector aligned.
>    */
> diff --git a/include/block/block.h b/include/block/block.h
> index 321295e..7ee9ab3 100644
> --- a/include/block/block.h
> +++ b/include/block/block.h
> @@ -433,7 +433,6 @@ void bdrv_set_guest_block_size(BlockDriverState *bs, int align);
>   void *qemu_blockalign(BlockDriverState *bs, size_t size);
>   void *qemu_blockalign0(BlockDriverState *bs, size_t size);
>   void *qemu_try_blockalign(BlockDriverState *bs, size_t size);
> -void *qemu_try_blockalign0(BlockDriverState *bs, size_t size);
>   bool bdrv_qiov_is_aligned(BlockDriverState *bs, QEMUIOVector *qiov);
>   
>   struct HBitmapIter;
> diff --git a/include/block/nbd.h b/include/block/nbd.h
> index b759595..fccef2d 100644
> --- a/include/block/nbd.h
> +++ b/include/block/nbd.h
> @@ -95,7 +95,6 @@ BlockBackend *nbd_export_get_blockdev(NBDExport *exp);
>   
>   NBDExport *nbd_export_find(const char *name);
>   void nbd_export_set_name(NBDExport *exp, const char *name);
> -void nbd_export_close_all(void);
>   
>   NBDClient *nbd_client_new(NBDExport *exp, int csock,
>                             void (*close)(NBDClient *));
> diff --git a/nbd.c b/nbd.c
> index e56afbc..634bf84 100644
> --- a/nbd.c
> +++ b/nbd.c
> @@ -1067,15 +1067,6 @@ BlockBackend *nbd_export_get_blockdev(NBDExport *exp)
>       return exp->blk;
>   }
>   
> -void nbd_export_close_all(void)
> -{
> -    NBDExport *exp, *next;
> -
> -    QTAILQ_FOREACH_SAFE(exp, &exports, next, next) {
> -        nbd_export_close(exp);
> -    }
> -}
> -
>   static ssize_t nbd_co_send_reply(NBDRequest *req, struct nbd_reply *reply,
>                                    int len)
>   {