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| author |   Peter Zijlstra <peterz@infradead.org> | 2021-10-07 00:40:17 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-07 00:40:17 +0200 |
| commit | b08cadbd3b8721db738d9a00ef3ce3ed667e6d9c (patch) | |
| tree | 1b44ef760764ea19f82fd80088135d23ab565d2d /net/core/dev.c | |
| parent | objtool: Support pv_opsindirect calls for noinstr (diff) | |
| parent | objtool: Remove redundant 'len' field from struct section (diff) | |
| download | linux-dev-b08cadbd3b8721db738d9a00ef3ce3ed667e6d9c.tar.xz linux-dev-b08cadbd3b8721db738d9a00ef3ce3ed667e6d9c.zip | |
Merge branch 'objtool/urgent'
Fixup conflicts.
# Conflicts:
# tools/objtool/check.c
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); |