drivers/net/ethernet/aquantia/atlantic/aq_ring.h:67:2: warning: field within 'struct aq_ring_buff_s' is less aligned than 'union aq_ring_buff_s::(anonymous at drivers/net/ethernet/aquantia/atlantic/aq_ring.h:67:2)' and is usually due to 'struct aq_ring_b...

From: kernel test robot
Date: Wed Mar 01 2023 - 15:30:45 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c0927a7a5391f7d8e593e5e50ead7505a23cadf9
commit: 09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8 ARM: dove: multiplatform support
date: 11 months ago
config: arm-randconfig-r032-20230302 (https://download.01.org/0day-ci/archive/20230302/202303020445.1SDi4WmD-lkp@xxxxxxxxx/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db89896bbbd2251fff457699635acbbedeead27f)
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 arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 09f6b27d5ddd9ad0ec096d1b0f8decdacc70f0f8
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/net/ethernet/aquantia/atlantic/ net/l2tp/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303020445.1SDi4WmD-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

In file included from drivers/net/ethernet/aquantia/atlantic/aq_main.c:14:
In file included from drivers/net/ethernet/aquantia/atlantic/aq_ptp.h:15:
>> drivers/net/ethernet/aquantia/atlantic/aq_ring.h:67:2: warning: field within 'struct aq_ring_buff_s' is less aligned than 'union aq_ring_buff_s::(anonymous at drivers/net/ethernet/aquantia/atlantic/aq_ring.h:67:2)' and is usually due to 'struct aq_ring_buff_s' being packed, which can lead to unaligned accesses [-Wunaligned-access]
union {
^
1 warning generated.
--
In file included from drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c:12:
>> drivers/net/ethernet/aquantia/atlantic/hw_atl/../aq_ring.h:67:2: warning: field within 'struct aq_ring_buff_s' is less aligned than 'union aq_ring_buff_s::(anonymous at drivers/net/ethernet/aquantia/atlantic/hw_atl/../aq_ring.h:67:2)' and is usually due to 'struct aq_ring_buff_s' being packed, which can lead to unaligned accesses [-Wunaligned-access]
union {
^
1 warning generated.
--
In file included from net/l2tp/l2tp_ppp.c:78:
In file included from include/linux/if_pppox.h:19:
include/uapi/linux/if_pppox.h:71:4: warning: field sa_addr within 'struct sockaddr_pppox' is less aligned than 'union (unnamed union at include/uapi/linux/if_pppox.h:68:2)' and is usually due to 'struct sockaddr_pppox' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} sa_addr;
^
>> include/uapi/linux/if_pppox.h:82:23: warning: field pppol2tp within 'struct sockaddr_pppol2tp' is less aligned than 'struct pppol2tp_addr' and is usually due to 'struct sockaddr_pppol2tp' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct pppol2tp_addr pppol2tp;
^
>> include/uapi/linux/if_pppox.h:97:25: warning: field pppol2tp within 'struct sockaddr_pppol2tpv3' is less aligned than 'struct pppol2tpv3_addr' and is usually due to 'struct sockaddr_pppol2tpv3' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct pppol2tpv3_addr pppol2tp;
^
>> include/uapi/linux/if_pppox.h:88:26: warning: field pppol2tp within 'struct sockaddr_pppol2tpin6' is less aligned than 'struct pppol2tpin6_addr' and is usually due to 'struct sockaddr_pppol2tpin6' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct pppol2tpin6_addr pppol2tp;
^
>> include/uapi/linux/if_pppox.h:103:28: warning: field pppol2tp within 'struct sockaddr_pppol2tpv3in6' is less aligned than 'struct pppol2tpv3in6_addr' and is usually due to 'struct sockaddr_pppol2tpv3in6' being packed, which can lead to unaligned accesses [-Wunaligned-access]
struct pppol2tpv3in6_addr pppol2tp;
^
5 warnings generated.


vim +67 drivers/net/ethernet/aquantia/atlantic/aq_ring.h

46f4c29d9de6e4 Igor Russkikh 2019-03-23 24
018423e90bee89 David VomLehn 2017-01-23 25 /* TxC SOP DX EOP
018423e90bee89 David VomLehn 2017-01-23 26 * +----------+----------+----------+-----------
018423e90bee89 David VomLehn 2017-01-23 27 * 8bytes|len l3,l4 | pa | pa | pa
018423e90bee89 David VomLehn 2017-01-23 28 * +----------+----------+----------+-----------
018423e90bee89 David VomLehn 2017-01-23 29 * 4/8bytes|len pkt |len pkt | | skb
018423e90bee89 David VomLehn 2017-01-23 30 * +----------+----------+----------+-----------
d3ed7c5cf79bb9 Igor Russkikh 2019-06-26 31 * 4/8bytes|is_gso |len,flags |len |len,is_eop
018423e90bee89 David VomLehn 2017-01-23 32 * +----------+----------+----------+-----------
018423e90bee89 David VomLehn 2017-01-23 33 *
018423e90bee89 David VomLehn 2017-01-23 34 * This aq_ring_buff_s doesn't have endianness dependency.
018423e90bee89 David VomLehn 2017-01-23 35 * It is __packed for cache line optimizations.
018423e90bee89 David VomLehn 2017-01-23 36 */
018423e90bee89 David VomLehn 2017-01-23 37 struct __packed aq_ring_buff_s {
018423e90bee89 David VomLehn 2017-01-23 38 union {
46f4c29d9de6e4 Igor Russkikh 2019-03-23 39 /* RX/TX */
46f4c29d9de6e4 Igor Russkikh 2019-03-23 40 dma_addr_t pa;
018423e90bee89 David VomLehn 2017-01-23 41 /* RX */
018423e90bee89 David VomLehn 2017-01-23 42 struct {
018423e90bee89 David VomLehn 2017-01-23 43 u32 rss_hash;
018423e90bee89 David VomLehn 2017-01-23 44 u16 next;
018423e90bee89 David VomLehn 2017-01-23 45 u8 is_hash_l4;
018423e90bee89 David VomLehn 2017-01-23 46 u8 rsvd1;
46f4c29d9de6e4 Igor Russkikh 2019-03-23 47 struct aq_rxpage rxdata;
d3ed7c5cf79bb9 Igor Russkikh 2019-06-26 48 u16 vlan_rx_tag;
018423e90bee89 David VomLehn 2017-01-23 49 };
018423e90bee89 David VomLehn 2017-01-23 50 /* EOP */
018423e90bee89 David VomLehn 2017-01-23 51 struct {
018423e90bee89 David VomLehn 2017-01-23 52 dma_addr_t pa_eop;
018423e90bee89 David VomLehn 2017-01-23 53 struct sk_buff *skb;
018423e90bee89 David VomLehn 2017-01-23 54 };
018423e90bee89 David VomLehn 2017-01-23 55 /* TxC */
018423e90bee89 David VomLehn 2017-01-23 56 struct {
018423e90bee89 David VomLehn 2017-01-23 57 u32 mss;
018423e90bee89 David VomLehn 2017-01-23 58 u8 len_l2;
018423e90bee89 David VomLehn 2017-01-23 59 u8 len_l3;
018423e90bee89 David VomLehn 2017-01-23 60 u8 len_l4;
386aff88e32ec3 Pavel Belous 2017-03-23 61 u8 is_ipv6:1;
386aff88e32ec3 Pavel Belous 2017-03-23 62 u8 rsvd2:7;
018423e90bee89 David VomLehn 2017-01-23 63 u32 len_pkt;
d3ed7c5cf79bb9 Igor Russkikh 2019-06-26 64 u16 vlan_tx_tag;
018423e90bee89 David VomLehn 2017-01-23 65 };
018423e90bee89 David VomLehn 2017-01-23 66 };
018423e90bee89 David VomLehn 2017-01-23 @67 union {
018423e90bee89 David VomLehn 2017-01-23 68 struct {
822cd114cd05a4 Igor Russkikh 2019-11-07 69 u32 len:16;
018423e90bee89 David VomLehn 2017-01-23 70 u32 is_ip_cso:1;
018423e90bee89 David VomLehn 2017-01-23 71 u32 is_udp_cso:1;
018423e90bee89 David VomLehn 2017-01-23 72 u32 is_tcp_cso:1;
018423e90bee89 David VomLehn 2017-01-23 73 u32 is_cso_err:1;
018423e90bee89 David VomLehn 2017-01-23 74 u32 is_sop:1;
018423e90bee89 David VomLehn 2017-01-23 75 u32 is_eop:1;
822cd114cd05a4 Igor Russkikh 2019-11-07 76 u32 is_gso_tcp:1;
822cd114cd05a4 Igor Russkikh 2019-11-07 77 u32 is_gso_udp:1;
018423e90bee89 David VomLehn 2017-01-23 78 u32 is_mapped:1;
018423e90bee89 David VomLehn 2017-01-23 79 u32 is_cleaned:1;
018423e90bee89 David VomLehn 2017-01-23 80 u32 is_error:1;
d3ed7c5cf79bb9 Igor Russkikh 2019-06-26 81 u32 is_vlan:1;
15beab0a9d797b Dmitry Bezrukov 2020-02-14 82 u32 is_lro:1;
15beab0a9d797b Dmitry Bezrukov 2020-02-14 83 u32 rsvd3:3;
c7545689244b50 Pavel Belous 2017-09-25 84 u16 eop_index;
c7545689244b50 Pavel Belous 2017-09-25 85 u16 rsvd4;
018423e90bee89 David VomLehn 2017-01-23 86 };
c7545689244b50 Pavel Belous 2017-09-25 87 u64 flags;
018423e90bee89 David VomLehn 2017-01-23 88 };
018423e90bee89 David VomLehn 2017-01-23 89 };
018423e90bee89 David VomLehn 2017-01-23 90

:::::: The code at line 67 was first introduced by commit
:::::: 018423e90bee8978105eaaa265a26e70637f9f1e net: ethernet: aquantia: Add ring support code

:::::: TO: David VomLehn <vomlehn@xxxxxxxxx>
:::::: CC: David S. Miller <davem@xxxxxxxxxxxxx>

--
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https://github.com/intel/lkp-tests