Re: [PATCH v3 2/3] net: add kcov handle to skb extensions

From: kernel test robot
Date: Mon Oct 26 2020 - 13:35:13 EST

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Hi Aleksandr,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on 2ef991b5fdbe828dc8fb8af473dab160729570ed]

url: https://github.com/0day-ci/linux/commits/Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
base: 2ef991b5fdbe828dc8fb8af473dab160729570ed
config: x86_64-randconfig-a001-20201026 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project f2c25c70791de95d2466e09b5b58fc37f6ccd7a4)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# https://github.com/0day-ci/linux/commit/46d348800b64931071128ba47a5f17641d288a2f
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Aleksandr-Nogikh/net-mac80211-kernel-enable-KCOV-remote-coverage-collection-for-802-11-frame-handling/20201026-231134
git checkout 46d348800b64931071128ba47a5f17641d288a2f
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

In file included from drivers/vdpa/vdpa_sim/vdpa_sim.c:24:
In file included from include/linux/etherdevice.h:20:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/vdpa/vdpa_sim/vdpa_sim.c:364:27: warning: shift count >= width of type [-Wshift-count-overflow]
dev->coherent_dma_mask = DMA_BIT_MASK(64);
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 4 errors generated.
--
In file included from drivers/net/ethernet/intel/e1000/e1000_main.c:4:
In file included from drivers/net/ethernet/intel/e1000/e1000.h:18:
In file included from include/linux/netdevice.h:37:
In file included from include/linux/ethtool.h:18:
In file included from include/uapi/linux/ethtool.h:19:
In file included from include/linux/if_ether.h:19:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> drivers/net/ethernet/intel/e1000/e1000_main.c:1002:45: warning: shift count >= width of type [-Wshift-count-overflow]
!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
~~~~~~~~~~~~~~~~~^~~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
3 warnings and 4 errors generated.
--
In file included from net/ipv4/fib_trie.c:49:
In file included from include/linux/inet.h:42:
In file included from include/net/net_namespace.h:39:
include/linux/skbuff.h:4617:26: error: implicit declaration of function 'skb_ext_add' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4617:43: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle_ptr = skb_ext_add(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:21: error: implicit declaration of function 'skb_ext_find' [-Werror,-Wimplicit-function-declaration]
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
include/linux/skbuff.h:4626:39: error: use of undeclared identifier 'SKB_EXT_KCOV_HANDLE'
u64 *kcov_handle = skb_ext_find(skb, SKB_EXT_KCOV_HANDLE);
^
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:86: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
~~~~~~~~~~~~~~~~~^~~~~
include/linux/compiler.h:69:3: note: expanded from macro '__trace_if_value'
(cond) ? \
^~~~
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:52: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
>> net/ipv4/fib_trie.c:324:13: warning: implicit conversion from 'unsigned long' to 'u32' (aka 'unsigned int') changes value from 2305843009213693946 to 4294967290 [-Wconstant-conversion]
if (bits > TNODE_VMALLOC_MAX)
~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
net/ipv4/fib_trie.c:305:35: note: expanded from macro 'TNODE_VMALLOC_MAX'
ilog2((SIZE_MAX - TNODE_SIZE(0)) / sizeof(struct key_vector *))
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/log2.h:161:14: note: expanded from macro 'ilog2'
__ilog2_u32(n) : \
~~~~~~~~~~~ ^
include/linux/compiler.h:56:47: note: expanded from macro 'if'
#define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) )
~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
include/linux/compiler.h:58:61: note: expanded from macro '__trace_if_var'
#define __trace_if_var(cond) (__builtin_constant_p(cond) ? (cond) : __trace_if_value(cond))
^~~~
3 warnings and 4 errors generated.

vim +364 drivers/vdpa/vdpa_sim/vdpa_sim.c

2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 342
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 343 static struct vdpasim *vdpasim_create(void)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 344 {
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 345 const struct vdpa_config_ops *ops;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 346 struct vdpasim *vdpasim;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 347 struct device *dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 348 int ret = -ENOMEM;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 349
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 350 if (batch_mapping)
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 351 ops = &vdpasim_net_batch_config_ops;
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 352 else
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 353 ops = &vdpasim_net_config_ops;
de91a4d0e725db drivers/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-08-04 354
a9974489b61c09 drivers/vdpa/vdpa_sim/vdpa_sim.c Max Gurtovoy 2020-08-04 355 vdpasim = vdpa_alloc_device(struct vdpasim, vdpa, NULL, ops, VDPASIM_VQ_NUM);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 356 if (!vdpasim)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 357 goto err_alloc;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 358
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 359 INIT_WORK(&vdpasim->work, vdpasim_work);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 360 spin_lock_init(&vdpasim->lock);
1e3e792650d2c0 drivers/vdpa/vdpa_sim/vdpa_sim.c Michael S. Tsirkin 2020-08-10 361 spin_lock_init(&vdpasim->iommu_lock);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 362
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 363 dev = &vdpasim->vdpa.dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 @364 dev->coherent_dma_mask = DMA_BIT_MASK(64);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 365 set_dma_ops(dev, &vdpasim_dma_ops);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 366
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 367 vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 368 if (!vdpasim->iommu)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 369 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 370
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 371 vdpasim->buffer = kmalloc(PAGE_SIZE, GFP_KERNEL);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 372 if (!vdpasim->buffer)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 373 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 374
5d7d0f387ae1b9 drivers/vdpa/vdpa_sim/vdpa_sim.c Michael S. Tsirkin 2020-07-12 375 eth_random_addr(vdpasim->config.mac);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 376
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 377 vringh_set_iotlb(&vdpasim->vqs[0].vring, vdpasim->iommu);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 378 vringh_set_iotlb(&vdpasim->vqs[1].vring, vdpasim->iommu);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 379
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 380 vdpasim->vdpa.dma_dev = dev;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 381 ret = vdpa_register_device(&vdpasim->vdpa);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 382 if (ret)
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 383 goto err_iommu;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 384
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 385 return vdpasim;
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 386
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 387 err_iommu:
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 388 put_device(dev);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 389 err_alloc:
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 390 return ERR_PTR(ret);
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 391 }
2c53d0f64c06f4 drivers/virtio/vdpa/vdpa_sim/vdpa_sim.c Jason Wang 2020-03-26 392

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Next message: John Garry: "[PATCH v2 1/4] iommu/iova: Add free_all_cpu_cached_iovas()"
Previous message: Vlastimil Babka: "[PATCH 1/3] mm, page_alloc: do not rely on the order of page_poison and init_on_alloc/free parameters"
In reply to: Willem de Bruijn: "Re: [PATCH v3 2/3] net: add kcov handle to skb extensions"
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