On Fri, Jan 15, 2016 at 10:45:41AM +0100, Peter Zijlstra wrote: > So _regmap_write() does: map->lock(map->lock_arg) > Which isn't very enlightening, since that can be a mutex or a spinlock, > the above strongly suggests spinlock though. > Looking at __regmap_init(), this seems to depend on: > (bus && bus->fast_io) || config->fast_io > now, afaict, regmap_mmio is used in this case, which has .fast_io = > true. > So yeah, fail. Indeed, that'd do it. It hadn't occurred to me that someone would be using MMIO with an rbtree cache.
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