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Subjectdrivers/media/test-drivers/vidtv/vidtv_psi.c:1778:32: warning: taking address of packed member 'bitfield' of class or structure 'vidtv_psi_table_eit_event' may result in an unaligned pointer value
Hi Daniel,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 61556703b610a104de324e4f061dc6cf7b218b46
commit: 7a7899f6f58e3270ccfd200ee63ebced5ddba3c9 media: vidtv: psi: Implement an Event Information Table (EIT)
date: 2 months ago
config: mips-randconfig-r032-20210207 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
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 mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7a7899f6f58e3270ccfd200ee63ebced5ddba3c9
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 7a7899f6f58e3270ccfd200ee63ebced5ddba3c9
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips

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

All warnings (new ones prefixed by >>):

drivers/media/test-drivers/vidtv/vidtv_psi.c:850:31: warning: taking address of packed member 'bitfield2' of class or structure 'vidtv_psi_table_pmt' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&pmt->bitfield2, desc_loop_len, 10);
^~~~~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:861:32: warning: taking address of packed member 'bitfield2' of class or structure 'vidtv_psi_table_pmt_stream' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&s->bitfield2, desc_loop_len, 10);
^~~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:893:32: warning: taking address of packed member 'bitfield' of class or structure 'vidtv_psi_table_sdt_service' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&s->bitfield, desc_loop_len, 12);
^~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:1556:31: warning: taking address of packed member 'bitfield' of class or structure 'vidtv_psi_table_nit' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&nit->bitfield, desc_loop_len, 12);
^~~~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:1571:32: warning: taking address of packed member 'bitfield' of class or structure 'vidtv_psi_table_transport' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&t->bitfield, desc_loop_len, 12);
^~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:1579:31: warning: taking address of packed member 'bitfield2' of class or structure 'vidtv_psi_table_nit' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&nit->bitfield2, transport_loop_len, 12);
^~~~~~~~~~~~~~
>> drivers/media/test-drivers/vidtv/vidtv_psi.c:1778:32: warning: taking address of packed member 'bitfield' of class or structure 'vidtv_psi_table_eit_event' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_set_desc_loop_len(&e->bitfield, desc_loop_len, 12);
^~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_psi.c:93:19: warning: unused function 'vidtv_psi_sdt_serv_get_desc_loop_len' [-Wunused-function]
static inline u16 vidtv_psi_sdt_serv_get_desc_loop_len(struct vidtv_psi_table_sdt_service *s)
^
drivers/media/test-drivers/vidtv/vidtv_psi.c:104:19: warning: unused function 'vidtv_psi_pmt_stream_get_desc_loop_len' [-Wunused-function]
static inline u16 vidtv_psi_pmt_stream_get_desc_loop_len(struct vidtv_psi_table_pmt_stream *s)
^
drivers/media/test-drivers/vidtv/vidtv_psi.c:115:19: warning: unused function 'vidtv_psi_pmt_get_desc_loop_len' [-Wunused-function]
static inline u16 vidtv_psi_pmt_get_desc_loop_len(struct vidtv_psi_table_pmt *p)
^
10 warnings generated.
--
>> drivers/media/test-drivers/vidtv/vidtv_channel.c:147:27: warning: taking address of packed member 'descriptor' of class or structure 'vidtv_psi_table_eit_event' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_desc_assign(&tail->descriptor, desc);
^~~~~~~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_channel.c:192:27: warning: taking address of packed member 'descriptor' of class or structure 'vidtv_psi_table_sdt_service' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_desc_assign(&tail->descriptor, desc);
^~~~~~~~~~~~~~~~
drivers/media/test-drivers/vidtv/vidtv_channel.c:292:29: warning: taking address of packed member 'descriptor' of class or structure 'vidtv_psi_table_pmt_stream' may result in an unaligned pointer value [-Waddress-of-packed-member]
vidtv_psi_desc_assign(&tail->descriptor, desc);
^~~~~~~~~~~~~~~~
3 warnings generated.


vim +1778 drivers/media/test-drivers/vidtv/vidtv_psi.c

1758
1759 void vidtv_psi_eit_table_update_sec_len(struct vidtv_psi_table_eit *eit)
1760 {
1761 u16 length = 0;
1762 struct vidtv_psi_table_eit_event *e = eit->event;
1763 u16 desc_loop_len;
1764
1765 /*
1766 * from immediately after 'section_length' until
1767 * 'last_table_id'
1768 */
1769 length += EIT_LEN_UNTIL_LAST_TABLE_ID;
1770
1771 while (e) {
1772 /* skip both pointers at the end */
1773 length += sizeof(struct vidtv_psi_table_eit_event) -
1774 sizeof(struct vidtv_psi_desc *) -
1775 sizeof(struct vidtv_psi_table_eit_event *);
1776
1777 desc_loop_len = vidtv_psi_desc_comp_loop_len(e->descriptor);
> 1778 vidtv_psi_set_desc_loop_len(&e->bitfield, desc_loop_len, 12);
1779
1780 length += desc_loop_len;
1781
1782 e = e->next;
1783 }
1784
1785 length += CRC_SIZE_IN_BYTES;
1786
1787 vidtv_psi_set_sec_len(&eit->header, length);
1788 }
1789

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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