Re: [PATCH] net: ___neigh_lookup_noref(): remove redundant parameters

From: kernel test robot
Date: Tue Dec 05 2023 - 08:12:39 EST

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In reply to: kernel test robot: "Re: [PATCH] net: ___neigh_lookup_noref(): remove redundant parameters"
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Hi YangXin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]
[also build test WARNING on net/main linus/master v6.7-rc4 next-20231205]
[cannot apply to horms-ipvs/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/YangXin/net-___neigh_lookup_noref-remove-redundant-parameters/20231205-030205
base: net-next/main
patch link: https://lore.kernel.org/r/20231204185943.68-1-yx.0xffff%40gmail.com
patch subject: [PATCH] net: ___neigh_lookup_noref(): remove redundant parameters
config: i386-randconfig-015-20231205 (https://download.01.org/0day-ci/archive/20231205/202312052031.mECkx7WX-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312052031.mECkx7WX-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312052031.mECkx7WX-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from drivers/net/ethernet/sfc/ef100_rx.c:11:
In file included from drivers/net/ethernet/sfc/net_driver.h:28:
In file included from include/net/busy_poll.h:18:
In file included from include/net/ip.h:30:
In file included from include/net/route.h:28:
include/net/arp.h:27:63: error: too many arguments to function call, expected 3, have 4
return ___neigh_lookup_noref(&arp_tbl, neigh_key_eq32, &key, dev);
~~~~~~~~~~~~~~~~~~~~~ ^~~
include/net/neighbour.h:293:33: note: '___neigh_lookup_noref' declared here
static inline struct neighbour *___neigh_lookup_noref(
^
In file included from drivers/net/ethernet/sfc/ef100_rx.c:11:
In file included from drivers/net/ethernet/sfc/net_driver.h:28:
In file included from include/net/busy_poll.h:18:
In file included from include/net/ip.h:30:
In file included from include/net/route.h:29:
include/net/ndisc.h:383:63: error: too many arguments to function call, expected 3, have 4
return ___neigh_lookup_noref(&nd_tbl, neigh_key_eq128, pkey, dev);
~~~~~~~~~~~~~~~~~~~~~ ^~~
include/net/neighbour.h:293:33: note: '___neigh_lookup_noref' declared here
static inline struct neighbour *___neigh_lookup_noref(
^
In file included from drivers/net/ethernet/sfc/ef100_rx.c:11:
In file included from drivers/net/ethernet/sfc/net_driver.h:28:
In file included from include/net/busy_poll.h:18:
In file included from include/net/ip.h:30:
In file included from include/net/route.h:29:
include/net/ndisc.h:390:73: error: too many arguments to function call, expected 3, have 4
return ___neigh_lookup_noref(ipv6_stub->nd_tbl, neigh_key_eq128, pkey, dev);
~~~~~~~~~~~~~~~~~~~~~ ^~~
include/net/neighbour.h:293:33: note: '___neigh_lookup_noref' declared here
static inline struct neighbour *___neigh_lookup_noref(
^
drivers/net/ethernet/sfc/ef100_rx.c:175:3: warning: shift count is negative [-Wshift-count-negative]
EFX_QWORD_FIELD(*p_event, ESF_GZ_EV_RXPKTS_NUM_PKT);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:231:26: note: expanded from macro 'EFX_QWORD_FIELD'
#define EFX_QWORD_FIELD EFX_QWORD_FIELD32
^
drivers/net/ethernet/sfc/bitfield.h:183:2: note: expanded from macro 'EFX_QWORD_FIELD32'
EFX_EXTRACT_QWORD32(qword, EFX_LOW_BIT(field), \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:163:4: note: expanded from macro 'EFX_EXTRACT_QWORD32'
EFX_EXTRACT32((qword).u32[1], 32, 63, low, high)) & \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:143:2: note: expanded from macro 'EFX_EXTRACT32'
EFX_EXTRACT_NATIVE(le32_to_cpu(element), min, max, low, high)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:128:20: note: expanded from macro 'EFX_EXTRACT_NATIVE'
(native_element) >> ((low) - (min)) : \
^ ~~~~~~~~~~~~~~~
>> drivers/net/ethernet/sfc/ef100_rx.c:175:3: warning: shift count >= width of type [-Wshift-count-overflow]
EFX_QWORD_FIELD(*p_event, ESF_GZ_EV_RXPKTS_NUM_PKT);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:231:26: note: expanded from macro 'EFX_QWORD_FIELD'
#define EFX_QWORD_FIELD EFX_QWORD_FIELD32
^
drivers/net/ethernet/sfc/bitfield.h:183:2: note: expanded from macro 'EFX_QWORD_FIELD32'
EFX_EXTRACT_QWORD32(qword, EFX_LOW_BIT(field), \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:163:4: note: expanded from macro 'EFX_EXTRACT_QWORD32'
EFX_EXTRACT32((qword).u32[1], 32, 63, low, high)) & \
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:143:2: note: expanded from macro 'EFX_EXTRACT32'
EFX_EXTRACT_NATIVE(le32_to_cpu(element), min, max, low, high)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:129:20: note: expanded from macro 'EFX_EXTRACT_NATIVE'
(native_element) << ((min) - (low)))
^ ~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/ef100_rx.c:204:3: warning: shift count is negative [-Wshift-count-negative]
EFX_POPULATE_QWORD_1(*rxd, ESF_GZ_RX_BUF_ADDR, rx_buf->dma_addr);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:440:2: note: expanded from macro 'EFX_POPULATE_QWORD_1'
EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:438:2: note: expanded from macro 'EFX_POPULATE_QWORD_2'
EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:436:2: note: expanded from macro 'EFX_POPULATE_QWORD_3'
EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: (skipping 21 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
drivers/net/ethernet/sfc/bitfield.h:258:3: note: expanded from macro 'EFX_INSERT_NATIVE'
EFX_INSERT_NATIVE64(min, max, low, high, value) : \
^
drivers/net/ethernet/sfc/bitfield.h:247:21: note: expanded from macro 'EFX_INSERT_NATIVE64'
(((u64) (value)) << (low - min)) : \
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__cpu_to_le32'
#define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
^
drivers/net/ethernet/sfc/ef100_rx.c:204:3: warning: shift count is negative [-Wshift-count-negative]
EFX_POPULATE_QWORD_1(*rxd, ESF_GZ_RX_BUF_ADDR, rx_buf->dma_addr);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:440:2: note: expanded from macro 'EFX_POPULATE_QWORD_1'
EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:438:2: note: expanded from macro 'EFX_POPULATE_QWORD_2'
EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:436:2: note: expanded from macro 'EFX_POPULATE_QWORD_3'
EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: (skipping 21 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
drivers/net/ethernet/sfc/bitfield.h:259:3: note: expanded from macro 'EFX_INSERT_NATIVE'
EFX_INSERT_NATIVE32(min, max, low, high, value))
^
drivers/net/ethernet/sfc/bitfield.h:253:21: note: expanded from macro 'EFX_INSERT_NATIVE32'
(((u32) (value)) << (low - min)) : \
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__cpu_to_le32'
#define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
^
drivers/net/ethernet/sfc/ef100_rx.c:204:3: warning: shift count >= width of type [-Wshift-count-overflow]
EFX_POPULATE_QWORD_1(*rxd, ESF_GZ_RX_BUF_ADDR, rx_buf->dma_addr);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:440:2: note: expanded from macro 'EFX_POPULATE_QWORD_1'
EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:438:2: note: expanded from macro 'EFX_POPULATE_QWORD_2'
EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:436:2: note: expanded from macro 'EFX_POPULATE_QWORD_3'
EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: (skipping 21 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
drivers/net/ethernet/sfc/bitfield.h:259:3: note: expanded from macro 'EFX_INSERT_NATIVE'
EFX_INSERT_NATIVE32(min, max, low, high, value))
^
drivers/net/ethernet/sfc/bitfield.h:254:21: note: expanded from macro 'EFX_INSERT_NATIVE32'
(((u32) (value)) >> (min - low))))
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__cpu_to_le32'
#define __cpu_to_le32(x) ((__force __le32)(__u32)(x))
^
drivers/net/ethernet/sfc/ef100_rx.c:204:3: warning: shift count is negative [-Wshift-count-negative]
EFX_POPULATE_QWORD_1(*rxd, ESF_GZ_RX_BUF_ADDR, rx_buf->dma_addr);
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:440:2: note: expanded from macro 'EFX_POPULATE_QWORD_1'
EFX_POPULATE_QWORD_2(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:438:2: note: expanded from macro 'EFX_POPULATE_QWORD_2'
EFX_POPULATE_QWORD_3(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/sfc/bitfield.h:436:2: note: expanded from macro 'EFX_POPULATE_QWORD_3'
EFX_POPULATE_QWORD_4(qword, EFX_DUMMY_FIELD, 0, __VA_ARGS__)
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
note: (skipping 21 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
drivers/net/ethernet/sfc/bitfield.h:258:3: note: expanded from macro 'EFX_INSERT_NATIVE'
EFX_INSERT_NATIVE64(min, max, low, high, value) : \
^
drivers/net/ethernet/sfc/bitfield.h:247:21: note: expanded from macro 'EFX_INSERT_NATIVE64'

vim +175 drivers/net/ethernet/sfc/ef100_rx.c

8e57daf70671e4 Edward Cree 2020-08-03 170
8e57daf70671e4 Edward Cree 2020-08-03 171 void efx_ef100_ev_rx(struct efx_channel *channel, const efx_qword_t *p_event)
8e57daf70671e4 Edward Cree 2020-08-03 172 {
8e57daf70671e4 Edward Cree 2020-08-03 173 struct efx_rx_queue *rx_queue = efx_channel_get_rx_queue(channel);
8e57daf70671e4 Edward Cree 2020-08-03 174 unsigned int n_packets =
8e57daf70671e4 Edward Cree 2020-08-03 @175 EFX_QWORD_FIELD(*p_event, ESF_GZ_EV_RXPKTS_NUM_PKT);
8e57daf70671e4 Edward Cree 2020-08-03 176 int i;
8e57daf70671e4 Edward Cree 2020-08-03 177
8e57daf70671e4 Edward Cree 2020-08-03 178 WARN_ON_ONCE(!n_packets);
8e57daf70671e4 Edward Cree 2020-08-03 179 if (n_packets > 1)
8e57daf70671e4 Edward Cree 2020-08-03 180 ++channel->n_rx_merge_events;
8e57daf70671e4 Edward Cree 2020-08-03 181
8e57daf70671e4 Edward Cree 2020-08-03 182 channel->irq_mod_score += 2 * n_packets;
8e57daf70671e4 Edward Cree 2020-08-03 183
8e57daf70671e4 Edward Cree 2020-08-03 184 for (i = 0; i < n_packets; ++i) {
8e57daf70671e4 Edward Cree 2020-08-03 185 ef100_rx_packet(rx_queue,
8e57daf70671e4 Edward Cree 2020-08-03 186 rx_queue->removed_count & rx_queue->ptr_mask);
8e57daf70671e4 Edward Cree 2020-08-03 187 ++rx_queue->removed_count;
8e57daf70671e4 Edward Cree 2020-08-03 188 }
8e57daf70671e4 Edward Cree 2020-08-03 189 }
8e57daf70671e4 Edward Cree 2020-08-03 190

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