Re: [PATCH 01/25] xor: assert that xor_blocks is not called from interrupt context

Peter Zijlstra <[email protected]>
Newsgroups gmane.linux.ports.riscv,gmane.linux.ports.alpha,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.ppc64.devel,gmane.linux.ports.sparc,gmane.linux.uml.devel,gmane.linux.kernel.cryptoapi,gmane.comp.file-systems.btrfs,gmane.linux.kernel.cross-arch,gmane.linux.raid
Message-ID <[email protected]> 
On Wed, Mar 04, 2026 at 03:51:34PM +0100, Christoph Hellwig wrote:

> > How about "WARN_ON_ONCE(!preemptible())"?  I think that covers the union
> > of the context restrictions correctly.  (Compared to in_task(), it
> > handles the cases where hardirqs or softirqs are disabled.)
> 
> Good enough I guess.  Peter?

Sure. The only caveat with that is that for PREEMPT_COUNT=n this might
not work, it unconditionally returns 0.
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