linux-kernel - [PATCH 5/9] virtio-scsi: eliminate anonymous module_init & module

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Message-Id: <20220316192010.19001-6-rdunlap@infradead.org>
Date:   Wed, 16 Mar 2022 12:20:06 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     linux-kernel@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        Jens Axboe <axboe@...nel.dk>, Amit Shah <amit@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Eli Cohen <eli@...lanox.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Leon Romanovsky <leon@...nel.org>,
        Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Felipe Balbi <felipe.balbi@...ux.intel.com>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Krzysztof Opasiak <k.opasiak@...sung.com>,
        Igor Kotrasinski <i.kotrasinsk@...sung.com>,
        Valentina Manea <valentina.manea.m@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Jussi Kivilinna <jussi.kivilinna@...et.fi>,
        Joachim Fritschi <jfritschi@...enet.de>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...nel.org>,
        Karol Herbst <karolherbst@...il.com>,
        Pekka Paalanen <ppaalanen@...il.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>, netfilter-devel@...r.kernel.org,
        coreteam@...filter.org, netdev@...r.kernel.org,
        linux-block@...r.kernel.org, linux-crypto@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-scsi@...r.kernel.org,
        linux-usb@...r.kernel.org, nouveau@...ts.freedesktop.org,
        virtualization@...ts.linux-foundation.org, x86@...nel.org
Subject: [PATCH 5/9] virtio-scsi: eliminate anonymous module_init & module_exit

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@...radead.org>
Cc: "Michael S. Tsirkin" <mst@...hat.com>
Cc: Jason Wang <jasowang@...hat.com>
Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Stefan Hajnoczi <stefanha@...hat.com>
Cc: "James E.J. Bottomley" <jejb@...ux.ibm.com>
Cc: "Martin K. Petersen" <martin.petersen@...cle.com>
Cc: linux-scsi@...r.kernel.org
Cc: virtualization@...ts.linux-foundation.org
---
 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");