uart_port_tx_flags(9)

💅 uart_port_tx_flags (kernel API manual, bestie edition)

okay so you're in the Kernel API Manual and the page you pulled up is uart_port_tx_flags, section 9. it's the transmit helper for uart_port — but make it flags. we love an option-forward king 👑

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✨ NAME ✨

uart_port_tx_flags — transmit helper for uart_port with flags 🎀

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🦋 SYNOPSIS 🦋

uart_port_tx_flags (port , ch , flags , tx_ready , put_char );

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🌸 ARGUMENTS 🌸

• port — the uart port. that's your main character right there 💅
• ch — a variable to store a character that's gonna be written to the HW. yes, it's a variable, not a value — it holds the char ✨
• flags — UART_TX_NOSTOP or something similar. flags go here, bestie.
• tx_ready — the "can HW accept more data" function. vibe check for the hardware 🫶
• put_char — the function that writes a character. it does exactly what it says on the tin.

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💖 DESCRIPTION 💖

okay so this is the short one, ngl. for the full story, go see uart_port_tx_limited — that's where all the details live, iykyk 😭💀

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👑 SEE ALSO 👑

like literally all of these, they're iconic together:

• Kernel file ./include/linux/serial_core.h struct uart_ops(9)
• uart_port_set_cons(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)

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and that's the whole page, bestie, no cap ✨ this little gem lives in ./include/linux and the version date on it is October 2026 — so yeah, from the future, slay 🕰️💜 mwah, go read uart_port_tx_limited now fr fr 🎀