Re: [PATCH 2/9] virtio_console: eliminate anonymous module_init & module_exit
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: 2022-03-20 12:05:08
Also in:
linux-block, linux-crypto, linux-rdma, linux-scsi, linux-usb, lkml, netfilter-devel, nouveau, virtualization
On Wed, Mar 16, 2022 at 12:20:03PM -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: 31610434bc35 ("Virtio console driver")
Fixes: 7177876fea83 ("virtio: console: Add ability to remove module")
Signed-off-by: Randy Dunlap <redacted>
Cc: Amit Shah <amit@kernel.org>
Cc: virtualization@lists.linux-foundation.org
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.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.
quoted hunk ↗ jump to hunk
--- drivers/char/virtio_console.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)--- lnx-517-rc8.orig/drivers/char/virtio_console.c +++ lnx-517-rc8/drivers/char/virtio_console.c@@ -2245,7 +2245,7 @@ static struct virtio_driver virtio_rproc .remove = virtcons_remove, }; -static int __init init(void) +static int __init virtio_console_init(void) { int err;@@ -2280,7 +2280,7 @@ free: return err; } -static void __exit fini(void) +static void __exit virtio_console_fini(void) { reclaim_dma_bufs();@@ -2290,8 +2290,8 @@ static void __exit fini(void) class_destroy(pdrvdata.class); debugfs_remove_recursive(pdrvdata.debugfs_dir); } -module_init(init); -module_exit(fini); +module_init(virtio_console_init); +module_exit(virtio_console_fini); MODULE_DESCRIPTION("Virtio console driver"); MODULE_LICENSE("GPL");