serial: drop SERIAL_8250_DEPRECATED_OPTIONS

In 3.7, 8250 was unintentionally renamed to 8250_core. This happened in
the commit 835d844d1a28 (8250_pnp: do pnp probe before legacy probe).
This made 8250.<xxxx> module options effectively defunct. Instead,
8250_core.<xxxx> worked.

In 3.9, the commit f2b8dfd9e480 (serial: 8250: Keep 8250.<xxxx> module
options functional after driver rename) made the original options work
again by introducing a hack.

Later in 3.9, the commit 9196d8acd7f9 (TTY: 8250, revert module name
change) changed the module name back to 8250 (from 8250_core). Since
then, the hack was there to support the transient 8250_core.<xxxx>
options. Those were present only in the 3.7..3.9 range.

These transient options were deprecated by 9326b047e4fd (TTY: 8250,
deprecated 8250_core.* options) in v3.9 too.

Now, after those 12 years, it is time to get rid of this hack
completely.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://patch.msgid.link/20251119092457.826789-4-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 0 insertions, 68 deletions

diff --git a/drivers/tty/serial/8250/8250_platform.c b/drivers/tty/serial/8250/8250_platform.c
index b27981340e76..38b158ec4725 100644
--- a/drivers/tty/serial/8250/8250_platform.c
+++ b/drivers/tty/serial/8250/8250_platform.c
@@ -390,30 +390,3 @@ module_param(skip_txen_test, uint, 0644);
 MODULE_PARM_DESC(skip_txen_test, "Skip checking for the TXEN bug at init time");
 
 MODULE_ALIAS_CHARDEV_MAJOR(TTY_MAJOR);
-
-#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
-#ifndef MODULE
-/*
- * This module was renamed to 8250_core in 3.7. Keep the old "8250" name
- * working as well for the module options so we don't break people. We
- * need to keep the names identical and the convenient macros will happily
- * refuse to let us do that by failing the build with redefinition errors
- * of global variables. So we stick them inside a dummy function to avoid
- * those conflicts. The options still get parsed, and the redefined
- * MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
- *
- * This is hacky.  I'm sorry.
- */
-static void __used s8250_options(void)
-{
-#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX "8250_core."
-
-	module_param_cb(share_irqs, &param_ops_uint, &share_irqs, 0644);
-	module_param_cb(nr_uarts, &param_ops_uint, &nr_uarts, 0644);
-	module_param_cb(skip_txen_test, &param_ops_uint, &skip_txen_test, 0644);
-}
-#else
-MODULE_ALIAS("8250_core");
-#endif
-#endif
diff --git a/drivers/tty/serial/8250/8250_rsa.c b/drivers/tty/serial/8250/8250_rsa.c
index 40a3dbd9e452..3b9c00515407 100644
--- a/drivers/tty/serial/8250/8250_rsa.c
+++ b/drivers/tty/serial/8250/8250_rsa.c
@@ -201,27 +201,3 @@ void rsa_reset(struct uart_8250_port *up)
 	serial_out(up, UART_RSA_FRR, 0);
 }
 EXPORT_SYMBOL_FOR_MODULES(rsa_reset, "8250_base");
-
-#ifdef CONFIG_SERIAL_8250_DEPRECATED_OPTIONS
-#ifndef MODULE
-/*
- * Keep the old "8250" name working as well for the module options so we don't
- * break people. We need to keep the names identical and the convenient macros
- * will happily refuse to let us do that by failing the build with redefinition
- * errors of global variables.  So we stick them inside a dummy function to
- * avoid those conflicts.  The options still get parsed, and the redefined
- * MODULE_PARAM_PREFIX lets us keep the "8250." syntax alive.
- *
- * This is hacky. I'm sorry.
- */
-static void __used rsa8250_options(void)
-{
-#undef MODULE_PARAM_PREFIX
-#define MODULE_PARAM_PREFIX "8250_core."
-
-	__module_param_call(MODULE_PARAM_PREFIX, probe_rsa,
-		&param_array_ops, .arr = &__param_arr_probe_rsa,
-		0444, -1, 0);
-}
-#endif
-#endif
diff --git a/drivers/tty/serial/8250/Kconfig b/drivers/tty/serial/8250/Kconfig
index f64ef0819cd4..58f0142a59ff 100644
--- a/drivers/tty/serial/8250/Kconfig
+++ b/drivers/tty/serial/8250/Kconfig
@@ -34,23 +34,6 @@ config SERIAL_8250
 	  Most people will say Y or M here, so that they can use serial mice,
 	  modems and similar devices connecting to the standard serial ports.
 
-config SERIAL_8250_DEPRECATED_OPTIONS
-	bool "Support 8250_core.* kernel options (DEPRECATED)"
-	depends on SERIAL_8250
-	default y
-	help
-	  In 3.7 we renamed 8250 to 8250_core by mistake, so now we have to
-	  accept kernel parameters in both forms like 8250_core.nr_uarts=4 and
-	  8250.nr_uarts=4. We now renamed the module back to 8250, but if
-	  anybody noticed in 3.7 and changed their userspace we still have to
-	  keep the 8250_core.* options around until they revert the changes
-	  they already did.
-
-	  If 8250 is built as a module, this adds 8250_core alias instead. 
-
-	  If you did not notice yet and/or you have userspace from pre-3.7, it
-	  is safe (and recommended) to say N here.
-
 config SERIAL_8250_PNP
 	bool "8250/16550 PNP device support" if EXPERT
 	depends on SERIAL_8250 && PNP