serial: 8250: make share_irqs local to 8250_platform

share_irqs is used solely in 8250_platform. Make it local to that file.

Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
Link: https://patch.msgid.link/20251119092457.826789-6-jirislaby@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Jiri Slaby (SUSE)

drivers/tty/serial/8250/8250.h

@@ -98,14 +98,6 @@ struct serial8250_config {
 
 extern unsigned int nr_uarts;
 
-#ifdef CONFIG_SERIAL_8250_SHARE_IRQ
-#define SERIAL8250_SHARE_IRQS 1
-#else
-#define SERIAL8250_SHARE_IRQS 0
-#endif
-
-extern unsigned int share_irqs;
-
 #define SERIAL8250_PORT_FLAGS(_base, _irq, _flags)		\
 	{							\
 		.iobase		= _base,			\

drivers/tty/serial/8250/8250_platform.c

@@ -30,7 +30,7 @@
  * share_irqs:     Whether we pass IRQF_SHARED to request_irq().
  *                 This option is unsafe when used on edge-triggered interrupts.
  */
-unsigned int share_irqs = SERIAL8250_SHARE_IRQS;
+static bool share_irqs = IS_ENABLED(CONFIG_SERIAL_8250_SHARE_IRQ);
 
 unsigned int nr_uarts = CONFIG_SERIAL_8250_RUNTIME_UARTS;
 
@@ -378,7 +378,7 @@ module_exit(serial8250_exit);
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Generic 8250/16x50 serial platform driver");
 
-module_param_hw(share_irqs, uint, other, 0644);
+module_param_hw(share_irqs, bool, other, 0644);
 MODULE_PARM_DESC(share_irqs, "Share IRQs with other non-8250/16x50 devices (unsafe)");
 
 module_param(nr_uarts, uint, 0644);