On 10/28/24 02:08, Andrii Nakryiko wrote: > From: Suren Baghdasaryan <surenb@xxxxxxxxxx> > > Convert mm_lock_seq to be seqcount_t and change all mmap_write_lock > variants to increment it, in-line with the usual seqcount usage pattern. > This lets us check whether the mmap_lock is write-locked by checking > mm_lock_seq.sequence counter (odd=locked, even=unlocked). This will be > used when implementing mmap_lock speculation functions. > As a result vm_lock_seq is also change to be unsigned to match the type > of mm_lock_seq.sequence. > > Suggested-by: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Signed-off-by: Suren Baghdasaryan <surenb@xxxxxxxxxx> > Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx> Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
