Messages in this thread | | | Date | Thu, 15 Apr 2021 11:11:44 +0200 | From | Peter Zijlstra <> | Subject | Re: [peterz-queue:perf/core 18/22] kernel/events/core.c:6418:22: sparse: sparse: incorrect type in assignment (different address spaces) |
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On Thu, Apr 15, 2021 at 11:03:09AM +0200, Marco Elver wrote: > On Thu, Apr 15, 2021 at 10:48AM +0200, Peter Zijlstra wrote:
> > I've ended up with the below delta, does that work for you? > > Thanks, that works for me. Do note that I explicitly chose u64 for > sig_addr/pending_addr because data->addr is u64. There might be a new > warning about the u64 to unsigned long assignment on 32 bit arches.
My local i386-defconfig build seemed happy now. Mostly I think you're allowed to silently truncate between base integer types. We'll see.. maybe some other compiler.
> Perhaps it needs something ugly like this: > > info.si_addr = (void __user *)(unsigned long)event->pending_addr; > > if pending_addr wants to be u64. Or just > > event->pending_addr = (unsigned long)data->addr; > > if data->addr being u64 on 32 bit arches is simply overkill.
Yeah it is. It's u64 for data layout purposes, the perf buffer works in u64 chunks.
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