Subj : [$] A new API for interrupt-aware spinlocks
To   : All
From : LWN.net
Date : Wed Oct 15 2025 17:30:08

[$] A new API for interrupt-aware spinlocks

Date:
Wed, 15 Oct 2025 16:28:20 +0000

Description:
Boqun Feng spoke at Kangrejos2025 about adding a frequently needed API for 
Rust drivers
that need to handle interrupts: interrupt-aware spinlocks. Most drivers will
need to communicate information from interrupt handlers to main driver code, 
and
this exchange is frequently synchronized with the use of spinlocks. While his
first attempts ran into problems, Feng's ultimate solution could help prevent 
bugs
in C code as well, by tracking the number of nested scopes that have disabled
interrupts. The patch set , which contains work from Feng and Lyude Paul, is 
still under review.

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Link to news story:
https://lwn.net/Articles/1039374/


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