diff options
| author | Ingo Molnar <mingo@kernel.org> | 2017-02-14 07:29:14 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-02-14 07:29:14 +0100 |
| commit | 210f400d68a14bc89e2e61dc2e06cdd67cfeb5f6 (patch) | |
| tree | 2098a7db539f0e92676d8d953002db3cc8eb03b8 /net/core/dev.c | |
| parent | f2029b1e47b607619d1dd2cb0bbb77f64ec6b7c2 (diff) | |
| parent | 7089db84e356562f8ba737c29e472cc42d530dbc (diff) | |
Merge tag 'v4.10-rc8' into perf/core, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/core/dev.c')
| -rw-r--r-- | net/core/dev.c | 31 |
1 files changed, 13 insertions, 18 deletions
diff --git a/net/core/dev.c b/net/core/dev.c index 7f218e095361..29101c98399f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -1695,24 +1695,19 @@ EXPORT_SYMBOL_GPL(net_dec_egress_queue); static struct static_key netstamp_needed __read_mostly; #ifdef HAVE_JUMP_LABEL -/* We are not allowed to call static_key_slow_dec() from irq context - * If net_disable_timestamp() is called from irq context, defer the - * static_key_slow_dec() calls. - */ static atomic_t netstamp_needed_deferred; -#endif - -void net_enable_timestamp(void) +static void netstamp_clear(struct work_struct *work) { -#ifdef HAVE_JUMP_LABEL int deferred = atomic_xchg(&netstamp_needed_deferred, 0); - if (deferred) { - while (--deferred) - static_key_slow_dec(&netstamp_needed); - return; - } + while (deferred--) + static_key_slow_dec(&netstamp_needed); +} +static DECLARE_WORK(netstamp_work, netstamp_clear); #endif + +void net_enable_timestamp(void) +{ static_key_slow_inc(&netstamp_needed); } EXPORT_SYMBOL(net_enable_timestamp); @@ -1720,12 +1715,12 @@ EXPORT_SYMBOL(net_enable_timestamp); void net_disable_timestamp(void) { #ifdef HAVE_JUMP_LABEL - if (in_interrupt()) { - atomic_inc(&netstamp_needed_deferred); - return; - } -#endif + /* net_disable_timestamp() can be called from non process context */ + atomic_inc(&netstamp_needed_deferred); + schedule_work(&netstamp_work); +#else static_key_slow_dec(&netstamp_needed); +#endif } EXPORT_SYMBOL(net_disable_timestamp); |