On 4/22/20 2:14 AM, Michel Lespinasse wrote: > Add a couple APIs used by kernel/bpf/stackmap.c only: > - mmap_read_trylock_non_owner() > - mmap_read_unlock_non_owner() (may be called from a work queue). > > It's still not ideal that bpf/stackmap subverts the lock ownership > in this way. Thanks to Peter Zijlstra for suggesting this API as the > least-ugly way of addressing this in the short term. > > Signed-off-by: Michel Lespinasse <walken@xxxxxxxxxx> > Reviewed-by: Daniel Jordan <daniel.m.jordan@xxxxxxxxxx> Ugh... oh well. Reviewed-by: Vlastimil Babka <vbabka@xxxxxxx>
