tree: https://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211.git master head: 49241828e8ed0b0a3dc73466d5bc562ae90acfd6 commit: 96bd4b9e4a44c6c1da93fd3e48bd8eb1b332584a [6/11] mac80211: Adjust TSQ pacing shift config: x86_64-randconfig-x011-201807 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: git checkout 96bd4b9e4a44c6c1da93fd3e48bd8eb1b332584a # save the attached .config to linux build tree make ARCH=x86_64
All errors (new ones prefixed by >>):
net/mac80211/tx.c: In function '__ieee80211_subif_start_xmit':
>> net/mac80211/tx.c:3581:3: error: implicit declaration of function
>> 'sk_pacing_shift_update'; did you mean 'sk_incoming_cpu_update'?
>> [-Werror=implicit-function-declaration]
sk_pacing_shift_update(skb->sk, 8);
^~~~~~~~~~~~~~~~~~~~~~
sk_incoming_cpu_update
Cyclomatic Complexity 5 include/linux/compiler.h:__read_once_size
Cyclomatic Complexity 5 include/linux/compiler.h:__write_once_size
Cyclomatic Complexity 2 arch/x86/include/asm/bitops.h:set_bit
Cyclomatic Complexity 2 arch/x86/include/asm/bitops.h:clear_bit
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:test_and_clear_bit
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:constant_test_bit
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:variable_test_bit
Cyclomatic Complexity 1 arch/x86/include/asm/bitops.h:fls64
Cyclomatic Complexity 1
include/uapi/linux/byteorder/little_endian.h:__le16_to_cpup
Cyclomatic Complexity 1 include/linux/log2.h:__ilog2_u64
Cyclomatic Complexity 1 include/linux/kernel.h:reciprocal_scale
Cyclomatic Complexity 1 include/linux/list.h:INIT_LIST_HEAD
Cyclomatic Complexity 2 include/linux/list.h:__list_add
Cyclomatic Complexity 1 include/linux/list.h:list_add
Cyclomatic Complexity 1 include/linux/list.h:list_add_tail
Cyclomatic Complexity 1 include/linux/list.h:__list_del
Cyclomatic Complexity 2 include/linux/list.h:__list_del_entry
Cyclomatic Complexity 1 include/linux/list.h:list_del_init
Cyclomatic Complexity 1 include/linux/list.h:list_move
Cyclomatic Complexity 1 include/linux/list.h:list_move_tail
Cyclomatic Complexity 1 include/linux/list.h:list_empty
Cyclomatic Complexity 1 include/asm-generic/getorder.h:__get_order
Cyclomatic Complexity 3 include/linux/bitmap.h:bitmap_empty
Cyclomatic Complexity 1 include/linux/err.h:ERR_PTR
Cyclomatic Complexity 1 include/linux/err.h:IS_ERR
Cyclomatic Complexity 3 include/linux/err.h:IS_ERR_OR_NULL
Cyclomatic Complexity 1 arch/x86/include/asm/atomic.h:atomic_read
Cyclomatic Complexity 1
arch/x86/include/asm/atomic64_64.h:atomic64_add_return
Cyclomatic Complexity 5 arch/x86/include/asm/preempt.h:__preempt_count_add
Cyclomatic Complexity 5 arch/x86/include/asm/preempt.h:__preempt_count_sub
Cyclomatic Complexity 1 include/linux/bottom_half.h:__local_bh_disable_ip
Cyclomatic Complexity 1 include/linux/bottom_half.h:local_bh_disable
Cyclomatic Complexity 1 include/linux/bottom_half.h:local_bh_enable
Cyclomatic Complexity 1 include/linux/lockdep.h:lock_is_held
Cyclomatic Complexity 1 include/linux/spinlock.h:spinlock_check
Cyclomatic Complexity 1 include/linux/spinlock.h:spin_lock
Cyclomatic Complexity 1 include/linux/spinlock.h:spin_lock_bh
Cyclomatic Complexity 1 include/linux/spinlock.h:spin_unlock
Cyclomatic Complexity 1 include/linux/spinlock.h:spin_unlock_bh
Cyclomatic Complexity 1 include/linux/spinlock.h:spin_unlock_irqrestore
Cyclomatic Complexity 1 include/linux/rcupdate.h:__rcu_read_lock
Cyclomatic Complexity 1 include/linux/rcupdate.h:__rcu_read_unlock
Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_lock_acquire
Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_lock_release
Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_read_lock
Cyclomatic Complexity 1 include/linux/rcupdate.h:rcu_read_unlock
Cyclomatic Complexity 1 include/linux/jiffies.h:_msecs_to_jiffies
Cyclomatic Complexity 3 include/linux/jiffies.h:msecs_to_jiffies
Cyclomatic Complexity 1 include/linux/timekeeping.h:ktime_get_ns
Cyclomatic Complexity 1 include/linux/timer.h:timer_pending
Cyclomatic Complexity 1 include/linux/kasan.h:kasan_kmalloc
Cyclomatic Complexity 28 include/linux/slab.h:kmalloc_index
Cyclomatic Complexity 1 include/linux/slab.h:kmem_cache_alloc_trace
Cyclomatic Complexity 1 include/linux/slab.h:kmalloc_order_trace
Cyclomatic Complexity 68 include/linux/slab.h:kmalloc_large
Cyclomatic Complexity 5 include/linux/slab.h:kmalloc
Cyclomatic Complexity 5 include/linux/slab.h:kmalloc_array
Cyclomatic Complexity 1 include/linux/slab.h:kcalloc
Cyclomatic Complexity 1 include/linux/refcount.h:refcount_read
Cyclomatic Complexity 1 arch/x86/include/asm/checksum_64.h:add32_with_carry
Cyclomatic Complexity 1 arch/x86/include/asm/checksum_64.h:csum_add
Cyclomatic Complexity 1 include/net/checksum.h:csum_sub
Cyclomatic Complexity 4 include/linux/idr.h:idr_alloc
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_end_pointer
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_queue_empty
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_queue_is_last
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_queue_next
Cyclomatic Complexity 3 include/linux/skbuff.h:skb_cloned
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_header_cloned
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_shared
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_peek
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_peek_tail
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_queue_len
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_queue_head_init
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_insert
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_queue_splice
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_queue_splice_init
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_queue_splice_tail
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_queue_splice_tail_init
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_queue_before
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_queue_tail
Cyclomatic Complexity 1 include/linux/skbuff.h:__skb_unlink
Cyclomatic Complexity 2 include/linux/skbuff.h:__skb_dequeue
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_is_nonlinear
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_tail_pointer
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_put_zero
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_put_data
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_headroom
Cyclomatic Complexity 2 include/linux/skbuff.h:skb_tailroom
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_reserve
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_reset_transport_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_set_transport_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_network_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_reset_network_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_set_network_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_reset_mac_header
Cyclomatic Complexity 1 include/linux/skbuff.h:skb_set_mac_header
vim +3581 net/mac80211/tx.c
3553
3554 void __ieee80211_subif_start_xmit(struct sk_buff *skb,
3555 struct net_device *dev,
3556 u32 info_flags)
3557 {
3558 struct ieee80211_sub_if_data *sdata =
IEEE80211_DEV_TO_SUB_IF(dev);
3559 struct sta_info *sta;
3560 struct sk_buff *next;
3561
3562 if (unlikely(skb->len < ETH_HLEN)) {
3563 kfree_skb(skb);
3564 return;
3565 }
3566
3567 rcu_read_lock();
3568
3569 if (ieee80211_lookup_ra_sta(sdata, skb, &sta))
3570 goto out_free;
3571
3572 if (!IS_ERR_OR_NULL(sta)) {
3573 struct ieee80211_fast_tx *fast_tx;
3574
3575 /* We need a bit of data queued to build aggregates
properly, so
3576 * instruct the TCP stack to allow more than a single
ms of data
3577 * to be queued in the stack. The value is a bit-shift
of 1
3578 * second, so 8 is ~4ms of queued data. Only affects
local TCP
3579 * sockets.
3580 */
> 3581 sk_pacing_shift_update(skb->sk, 8);
3582
3583 fast_tx = rcu_dereference(sta->fast_tx);
3584
3585 if (fast_tx &&
3586 ieee80211_xmit_fast(sdata, sta, fast_tx, skb))
3587 goto out;
3588 }
3589
3590 if (skb_is_gso(skb)) {
3591 struct sk_buff *segs;
3592
3593 segs = skb_gso_segment(skb, 0);
3594 if (IS_ERR(segs)) {
3595 goto out_free;
3596 } else if (segs) {
3597 consume_skb(skb);
3598 skb = segs;
3599 }
3600 } else {
3601 /* we cannot process non-linear frames on this path */
3602 if (skb_linearize(skb)) {
3603 kfree_skb(skb);
3604 goto out;
3605 }
3606
3607 /* the frame could be fragmented, software-encrypted,
and other
3608 * things so we cannot really handle checksum offload
with it -
3609 * fix it up in software before we handle anything else.
3610 */
3611 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3612 skb_set_transport_header(skb,
3613
skb_checksum_start_offset(skb));
3614 if (skb_checksum_help(skb))
3615 goto out_free;
3616 }
3617 }
3618
3619 next = skb;
3620 while (next) {
3621 skb = next;
3622 next = skb->next;
3623
3624 skb->prev = NULL;
3625 skb->next = NULL;
3626
3627 skb = ieee80211_build_hdr(sdata, skb, info_flags, sta);
3628 if (IS_ERR(skb))
3629 goto out;
3630
3631 ieee80211_tx_stats(dev, skb->len);
3632
3633 ieee80211_xmit(sdata, sta, skb);
3634 }
3635 goto out;
3636 out_free:
3637 kfree_skb(skb);
3638 out:
3639 rcu_read_unlock();
3640 }
3641
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.config.gz
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