On Okt 10 2018, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> On Wed, Oct 10, 2018 at 03:01:29PM +0200, Andreas Schwab wrote:
>> On Okt 09 2018, Atish Patra <atish.patra@xxxxxxx> wrote:
>>
>> > +static void sifive_set_ie(struct sifive_gpio *chip, unsigned int offset)
>> > +{
>> > + unsigned long flags;
>> > + unsigned int trigger;
>> > +
>> > + raw_spin_lock_irqsave(&chip->lock, flags);
>> > + trigger = (chip->enabled & BIT(offset)) ? chip->trigger[offset] : 0;
>>
>> This should use test_bit instead.
>
> Given that this apparently needs the spinlock for atomciy with more than
> just the bitmap test_bit would be rather pointless.
BIT and test_bit/assign_bit are not compatible.
Andreas.
--
Andreas Schwab, SUSE Labs, schwab@xxxxxxx
GPG Key fingerprint = 0196 BAD8 1CE9 1970 F4BE 1748 E4D4 88E3 0EEA B9D7
"And now for something completely different."
