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authorJiri Slaby <jslaby@suse.cz>2021-05-05 11:19:10 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-05-13 16:57:17 +0200
commit19475209331168cdb8070a011650535f1c54a730 (patch)
tree613d1921238f08ff1dec3a9999d19b299560fff3 /drivers/net/hamradio
parenttty: make tty_ldisc_ops a param in tty_unregister_ldisc (diff)
downloadlinux-dev-19475209331168cdb8070a011650535f1c54a730.tar.xz
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tty: drop tty_ldisc_ops::refcount
The refcount is checked only in tty_unregister_ldisc and EBUSY returned if it is nonzero. But none of the tty_unregister_ldisc callers act anyhow if this (or any other) error is returned. So remove tty_ldisc_ops::refcount completely and make tty_unregister_ldisc return 'void' in the next patches. That means we assume tty_unregister_ldisc is not called while the ldisc might be in use. That relies on try_module_get in get_ldops and module_put in put_ldops. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Link: https://lore.kernel.org/r/20210505091928.22010-18-jslaby@suse.cz Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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