On Thu, Oct 07, 2021 at 09:16:36PM +0200, Anders Roxell wrote: > When building the kernel with sparse enabled 'C=1' the following > warnings can be seen: > > fs/proc/task_mmu.c:587:17: warning: context imbalance in 'smaps_pte_range' - unexpected unlock > fs/proc/task_mmu.c:1145:28: warning: context imbalance in 'clear_refs_pte_range' - unexpected unlock > fs/proc/task_mmu.c:1473:28: warning: context imbalance in 'pagemap_pmd_range' - unexpected unlock > fs/proc/task_mmu.c:1811:28: warning: context imbalance in 'gather_pte_stats' - unexpected unlock > > Rework to add __acquire() and __release() to tell sparse that it is all good. Surely the root problem here is that pmd_trans_huge_lock() isn't marked with __cond_lock() like, eg, get_locked_pte() is?
