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Date:   Sun, 20 Mar 2022 08:04:22 -0400
From:   "Michael S. Tsirkin" <mst@redhat.com>
To:     Randy Dunlap <rdunlap@infradead.org>
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Subject: Re: [PATCH 5/9] virtio-scsi: eliminate anonymous module_init &
 module_exit
Message-ID: <20220320080414-mutt-send-email-mst@kernel.org>
References: <20220316192010.19001-1-rdunlap@infradead.org>
 <20220316192010.19001-6-rdunlap@infradead.org>
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On Wed, Mar 16, 2022 at 12:20:06PM -0700, Randy Dunlap wrote:
> Eliminate anonymous module_init() and module_exit(), which can lead to
> confusion or ambiguity when reading System.map, crashes/oops/bugs,
> or an initcall_debug log.
> 
> Give each of these init and exit functions unique driver-specific
> names to eliminate the anonymous names.
> 
> Example 1: (System.map)
>  ffffffff832fc78c t init
>  ffffffff832fc79e t init
>  ffffffff832fc8f8 t init
> 
> Example 2: (initcall_debug log)
>  calling  init+0x0/0x12 @ 1
>  initcall init+0x0/0x12 returned 0 after 15 usecs
>  calling  init+0x0/0x60 @ 1
>  initcall init+0x0/0x60 returned 0 after 2 usecs
>  calling  init+0x0/0x9a @ 1
>  initcall init+0x0/0x9a returned 0 after 74 usecs
> 
> Fixes: 4fe74b1cb051 ("[SCSI] virtio-scsi: SCSI driver for QEMU based virtual machines")
> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
> Cc: "Michael S. Tsirkin" <mst@redhat.com>
> Cc: Jason Wang <jasowang@redhat.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Stefan Hajnoczi <stefanha@redhat.com>
> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com>
> Cc: "Martin K. Petersen" <martin.petersen@oracle.com>
> Cc: linux-scsi@vger.kernel.org
> Cc: virtualization@lists.linux-foundation.org


If this is done tree-wide, it's ok to do it for virtio too.

Acked-by: Michael S. Tsirkin <mst@redhat.com>

No real opinion on whether it's a good idea.


> ---
>  drivers/scsi/virtio_scsi.c |    8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> --- lnx-517-rc8.orig/drivers/scsi/virtio_scsi.c
> +++ lnx-517-rc8/drivers/scsi/virtio_scsi.c
> @@ -988,7 +988,7 @@ static struct virtio_driver virtio_scsi_
>  	.remove = virtscsi_remove,
>  };
>  
> -static int __init init(void)
> +static int __init virtio_scsi_init(void)
>  {
>  	int ret = -ENOMEM;
>  
> @@ -1020,14 +1020,14 @@ error:
>  	return ret;
>  }
>  
> -static void __exit fini(void)
> +static void __exit virtio_scsi_fini(void)
>  {
>  	unregister_virtio_driver(&virtio_scsi_driver);
>  	mempool_destroy(virtscsi_cmd_pool);
>  	kmem_cache_destroy(virtscsi_cmd_cache);
>  }
> -module_init(init);
> -module_exit(fini);
> +module_init(virtio_scsi_init);
> +module_exit(virtio_scsi_fini);
>  
>  MODULE_DEVICE_TABLE(virtio, id_table);
>  MODULE_DESCRIPTION("Virtio SCSI HBA driver");