uart_port_set_cons(9)

💅 uart_port_set_cons — the Kernel API Manual, section 9, bestie ✨

Okay so picture this: you're deep in kernel land, section 9 of the manual, and you need to touch the console field of a uart port without everything exploding. That's this function. Welcome. 🫶

✨ NAME ✨

uart_port_set_cons — Safely set the @cons field for a uart 🌸

✨ SYNOPSIS ✨

void uart_port_set_cons (struct uart_port *up , struct console *con );

✨ ARGUMENTS ✨

• up — The uart port to set 🎀
• con — The new console to set to 🦋

✨ DESCRIPTION ✨

Okay so listen, this one's important: this function must be used to set up->cons. Like, not "should", not "ideally" — must. 💅

The way it works is it uses the port lock to synchronize with the port lock wrappers, and that's the whole point: it makes sure the console can't change or disappear while another context is holding the port lock. Iconic behavior, honestly. No cap. 🔥

Bestie, fr fr — don't go poking up->cons directly. Use this. The lock is doing serious main character work here and you do not want to skip it. 😭

✨ SEE ALSO ✨

Kernel file ./include/linux/serial_core.h:

• struct uart_ops(9)
• uart_port_lock(9)
• uart_port_lock_irq(9)
• uart_port_lock_irqsave(9)
• uart_port_trylock(9)
• uart_port_trylock_irqsave(9)
• uart_port_unlock(9)
• uart_port_unlock_irq(9)
• uart_port_unlock_irqrestore(9)
• enum uart_pm_state(9)
• uart_xmit_advance(9)
• enum UART_TX_FLAGS(9)
• uart_port_tx_limited(9)
• uart_port_tx_limited_flags(9)
• uart_port_tx(9)
• uart_port_tx_flags(9)

And that's the whole vibe check, bestie! 💖 This little gem lives over in ./include/linux, dated October 2026, and it's filed under uart_port_set_cons(9). Go forth and set your console fields safely — slay. 👑🌈