diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2021-09-28 13:27:40 -0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2021-09-28 13:27:40 -0300 |
| commit | d30ef6d5c013c19e907f2a3a3d6eee04fcd3de0d (patch) | |
| tree | 1a29bbb9fd2bf9a0a5cb3589f18865cf2c1d2985 /kernel/bpf/stackmap.c | |
| parent | 27da60547de16a877fb192b90e4841e52fbe8fcd (diff) | |
| parent | d2c8a1554c10d5e0443b1f97f480d7dacd55cf55 (diff) | |
Merge branch 'mlx5-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux
Leon Romanovsky says:
====================
This is short series for mlx5 from Meir that adds a DevX UID to the UAR.
====================
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
* mellanox/mlx5-next:
IB/mlx5: Enable UAR to have DevX UID
net/mlx5: Add uid field to UAR allocation structures
Diffstat (limited to 'kernel/bpf/stackmap.c')
| -rw-r--r-- | kernel/bpf/stackmap.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/bpf/stackmap.c b/kernel/bpf/stackmap.c index e8eefdf8cf3e..09a3fd97d329 100644 --- a/kernel/bpf/stackmap.c +++ b/kernel/bpf/stackmap.c @@ -179,7 +179,7 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs, * with build_id. */ if (!user || !current || !current->mm || irq_work_busy || - !mmap_read_trylock_non_owner(current->mm)) { + !mmap_read_trylock(current->mm)) { /* cannot access current->mm, fall back to ips */ for (i = 0; i < trace_nr; i++) { id_offs[i].status = BPF_STACK_BUILD_ID_IP; @@ -204,9 +204,15 @@ static void stack_map_get_build_id_offset(struct bpf_stack_build_id *id_offs, } if (!work) { - mmap_read_unlock_non_owner(current->mm); + mmap_read_unlock(current->mm); } else { work->mm = current->mm; + + /* The lock will be released once we're out of interrupt + * context. Tell lockdep that we've released it now so + * it doesn't complain that we forgot to release it. + */ + rwsem_release(¤t->mm->mmap_lock.dep_map, _RET_IP_); irq_work_queue(&work->irq_work); } } |