From: Heiko Stuebner [mailto:[email protected]] > commit b05bbe3ea2db ("Reimplement IDR and IDA using the radix tree") > seems to > break thermal zone allocation. This happens both on todays mainline and > linux-next-20161216 and produces errors like:
> While I haven't looked to deeply into what idr exactly does, some findings: > - thermal_zone0 and thermal_zone1 are allocated correctly > - every further thermal_zone always gets allocated the number "1" > - thermal core calls idr_alloc with 0 for both start and end > - the rewrite-patch seems to change the semantics of idr_alloc > where it orignally said "@end: the maximum id (exclusive, <= 0 for max)" > the "<= 0" part is gone now, but I checked, simply setting INT_MAX > as end in the thermal_core does not help Hi Heiko, Thanks for the report! The problem is because the thermal subsystem calls idr_alloc() passing a NULL pointer for the data. I have fixed this problem in my git tree but haven't sent the patch to Andrew yet. This patch should fix the problem for you: http://git.infradead.org/users/willy/linux-dax.git/commitdiff/c52eeed7b759c3fefe9b7f1b0a17a438df6950f3 Now ... thermal is actually using an IDR when it could save memory by using an IDA. Are you interested in doing that conversion?
