mc_polling_wait_preemptible(9)

💅 mc_polling_wait_preemptible(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ this one's a lil function called mc_polling_wait_preemptible, and no cap, it's the chill version of waiting around. 🫶

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🌸 NAME 🌸

mc_polling_wait_preemptible — waits for the completion of an MC command doing preemptible polling. uslepp_range() is called between polling iterations. 💤

like literally, it keeps checking in on things, and between each little check it takes a nap via uslepp_range() so it's not out here spinning like a maniac. the way that it's preemptible too? iconic. 👑

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✨ SYNOPSIS ✨

int mc_polling_wait_preemptible (struct fsl_mc_io *mc_io , struct
fsl_mc_command *cmd , enum mc_cmd_status *mc_status );

she takes three things and gives you back an int, periodt. 🎀

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🦋 ARGUMENTS 🦋

• mc_io — the MC I/O object to be used. this is the main character of the I/O situation, fr fr. 🔥
• cmd — command buffer to receive MC response. it's giving "inbox for the response", and yes she will be filled in. 📬
• mc_status — MC command completion status. this is where you find out if it slayed or if it flopped. 💀

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🌈 SEE ALSO 🌈

bestie go read these next, iykyk:

• Kernel file ./drivers/bus/fsl-mc/mc-sys.c
• mc_write_command(9)
• mc_read_response(9)
• mc_polling_wait_atomic(9)
• mc_send_command(9)

the whole friend group is right there in mc-sys.c, go say hi 💜

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lowkey reminder: this page is filed under ./drivers/bus/fsl-mc, dated October 2026, and it's literally all about mc_polling_wait_preemptible(9). mwah, go poll something preemptibly bestie 🧚💖✨