Messages in this thread | | | Date | Fri, 13 Nov 2020 16:32:53 +0100 | From | Greg Kroah-Hartman <> | Subject | Re: [PATCH v4] kcov, usb: only collect coverage from __usb_hcd_giveback_urb in softirq |
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On Fri, Nov 13, 2020 at 02:42:44PM +0100, Andrey Konovalov wrote: > On Fri, Nov 13, 2020 at 2:28 PM Sebastian Andrzej Siewior > <bigeasy@linutronix.de> wrote: > > > > On 2020-11-13 13:51:19 [+0100], Andrey Konovalov wrote: > > > Hi Sebastian, > > > > Hi Andrey, > > > > > Replaced with what and why? > > > > Linus requested in > > https://lkml.kernel.org/r/CAHk-=wht7kAeyR5xEW2ORj7m0hibVxZ3t+2ie8vNHLQfdbN2_g@mail.gmail.com/ > > > > that drivers should not change their behaviour on context magic like > > in_atomic(), in_interrupt() and so on. > > The USB bits were posted in > > https://lkml.kernel.org/r/20201019100629.419020859@linutronix.de > > > > and merged (which is probably the same time as this patch). > > > > I haven't look what this code should do or does but there are HCDs for > > which this is never true like the UHCI/OHCI controller for instance. > > We could go back to adding softirq-specific kcov callbacks. Perhaps > with a simpler implementation than what we had before to only cover > this case. Something like kcov_remote_start_usb_softirq() and > kcov_remote_stop_softirq() that do the softirq check internally. > > Greg, what would you prefer?
I really have no idea, sorry.
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