pr_err(9)

💖 pr_err(9) — Kernel API Manual core 💖

okay bestie, this is pr_err(9) from the Kernel API Manual, and she is lowkey a whole vibe. If you need to print an error-level message, this is your girl. Let's go. 🫶✨

✨ NAME ✨

pr_err — Print an error-level message

🌸 SYNOPSIS 🌸

pr_err (fmt , ... );

🎀 ARGUMENTS 🎀

• fmt — format string. That's the template, bestie. 💅
• ... — arguments for the format string. All the lil values that go inside it. 🍓

🦋 DESCRIPTION 🦋

Okay so real talk: this macro expands to a printk with KERN_ERR loglevel. It uses pr_fmt to generate the format string. That's it, that's the whole thing, and it ate. 🔥

🔥 SEE ALSO 🔥

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

• printk_cpu_sync_get_irqsave(9)
• printk_cpu_sync_put_irqrestore(9)
• pr_fmt(9)
• printk(9)
• pr_emerg(9)
• pr_alert(9)
• pr_crit(9)
• pr_warn(9)
• pr_notice(9)
• pr_info(9)
• pr_cont(9)
• pr_devel(9)
• pr_debug(9)
• print_hex_dump_bytes(9)

ngl, that's the whole squad right there. Go click through them, iykyk. 👑

mwah, bestie 💖 This page lives in ./include/linux, dated October 2026, and it's filed under pr_err(9). periodt. ✨🎀🦋