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| author | Jonathan Corbet <corbet@lwn.net> | 2021-10-04 16:44:16 -0600 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2021-10-04 16:44:16 -0600 |
| commit | b718f9d919d16fb7b97a890f74d34593d9cecd20 (patch) | |
| tree | ed38d58283ae36e0478bac2e0d244e06dbcc2f1c /net/core/dev.c | |
| parent | 250a0a5ba9d2cfbdb7c77b421ff1e03d630bea46 (diff) | |
| parent | 9e1ff307c779ce1f0f810c7ecce3d95bbae40896 (diff) | |
Merge tag 'v5.15-rc4' into docs-next
This is needed to get a docs fix that entered via the DRM tree; testers
have requested it so that PDF builds in docs-next work again.
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 74fd402d26dd..7ee9fecd3aff 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -6923,12 +6923,16 @@ EXPORT_SYMBOL(napi_disable); */ void napi_enable(struct napi_struct *n) { - BUG_ON(!test_bit(NAPI_STATE_SCHED, &n->state)); - smp_mb__before_atomic(); - clear_bit(NAPI_STATE_SCHED, &n->state); - clear_bit(NAPI_STATE_NPSVC, &n->state); - if (n->dev->threaded && n->thread) - set_bit(NAPI_STATE_THREADED, &n->state); + unsigned long val, new; + + do { + val = READ_ONCE(n->state); + BUG_ON(!test_bit(NAPI_STATE_SCHED, &val)); + + new = val & ~(NAPIF_STATE_SCHED | NAPIF_STATE_NPSVC); + if (n->dev->threaded && n->thread) + new |= NAPIF_STATE_THREADED; + } while (cmpxchg(&n->state, val, new) != val); } EXPORT_SYMBOL(napi_enable); |