set_exclusive_cxl_commands(9)

💅 set_exclusive_cxl_commands 💅

okay bestie, welcome to the set_exclusive_cxl_commands(9) page from the Kernel API Manual ✨ this one is short, iconic, and very “lock the door, we’re being exclusive” energy: it atomically disables user cxl commands, periodt.

✨ NAME ✨

set_exclusive_cxl_commands — atomically disable user cxl commands 💖

🎀 SYNOPSIS 🎀

void set_exclusive_cxl_commands (struct cxl_memdev_state *mds , unsigned long *cmds );

🦋 ARGUMENTS 🦋

• mds — the device state to operate on, bestie. It’s the struct cxl_memdev_state * main character here.
• cmds — bitmap of commands to mark exclusive. Yep, the unsigned long * list of command IDs getting the exclusive treatment 💅

🌸 DESCRIPTION 🌸

okay so here’s the vibe: this function grabs cxl_memdev_rwsem in write mode to flush in-flight invocations of the ioctl path, and then it disables future execution of commands with the command ids set in cmds. all atomically. no cap, that’s the whole flex 🔥

🌈 SEE ALSO 🌈

• Kernel file ./drivers/cxl/core/memdev.c
• cxl_set_capacity(9)
• clear_exclusive_cxl_commands(9)
• cxl_mem_get_fw_info(9)
• cxl_mem_activate_fw(9)
• cxl_mem_abort_fw_xfer(9)

byeee 🫶 source/version: ./drivers/cxl/core — date: October 2026 — page: set_exclusive_cxl_commands(9) 💖✨