genwqe_fasync(9)

🌸 genwqe_fasync(9) 🌸

okay bestie, welcome to genwqe_fasync(9) from the Kernel API Manual. it’s giving “signal setup, but make it kernel,” and honestly? iconic. 🫶✨

✨ NAME ✨

genwqe_fasync — Setup process to receive SIGIO. that’s the assignment, periodt. 💅

🦋 SYNOPSIS 🦋

int genwqe_fasync (int fd , struct file *filp , int mode );

🎀 ARGUMENTS 🎀

• fd — file descriptor. yes bestie, the file descriptor. 🍓
• filp — file handle. the actual file handle. ✨
• mode — file mode. literally just file mode. 💜

💖 DESCRIPTION 💖

Sending a signal is working as following:

if (cdev->async_queue) kill_fasync(cdev->async_queue, SIGIO, POLL_IN);

Some devices also implement asynchronous notification to indicate when the device can be written; in this case, of course, kill_fasync must be called with a mode of POLL_OUT. that’s the important tea: POLL_IN for the first vibe, POLL_OUT for the write-notification vibe. iykyk. 😭🔥

🌈 SEE ALSO 🌈

Kernel file ./drivers/misc/genwqe/card_dev.c — and the whole friend group of refs:

• genwqe_search_pin(9)
• __genwqe_search_mapping(9)
• genwqe_kill_fasync(9)
• genwqe_open(9)
• genwqe_release(9)
• genwqe_vma_close(9)
• genwqe_mmap(9)
• do_flash_update(9)
• ddcb_cmd_cleanup(9)
• ddcb_cmd_fixups(9)
• genwqe_execute_ddcb(9)
• genwqe_ioctl(9)
• genwqe_device_create(9)
• genwqe_device_remove(9)

signed off by the source ./drivers/misc/genwqe, dated October 2026, for genwqe_fasync(9). mwah 💋🎀