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Message-ID: <202302171359.vvB4yivq-lkp@intel.com>
Date:   Fri, 17 Feb 2023 13:26:53 +0800
From:   kernel test robot <lkp@...el.com>
To:     Muhammad Sammar <muhammads@...dia.com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>
Subject: drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c:1170:1:
 warning: stack frame size (1168) exceeds limit (1024) in
 'dr_ste_v0_build_eth_ipv6_l3_l4_tag'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3ac88fa4605ec98e545fb3ad0154f575fda2de5f
commit: 7766c9b922febe18b4eb124eb731dd9a1ec71373 net/mlx5: DR, Add missing reserved fields to dr_match_param
date:   1 year, 2 months ago
config: powerpc-allyesconfig (https://download.01.org/0day-ci/archive/20230217/202302171359.vvB4yivq-lkp@intel.com/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 powerpc cross compiling tool for clang build
        # apt-get install binutils-powerpc-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7766c9b922febe18b4eb124eb731dd9a1ec71373
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 7766c9b922febe18b4eb124eb731dd9a1ec71373
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=powerpc SHELL=/bin/bash drivers/net/ethernet/mellanox/ drivers/platform/ drivers/staging/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302171359.vvB4yivq-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c:1170:1: warning: stack frame size (1168) exceeds limit (1024) in 'dr_ste_v0_build_eth_ipv6_l3_l4_tag' [-Wframe-larger-than]
   dr_ste_v0_build_eth_ipv6_l3_l4_tag(struct mlx5dr_match_param *value,
   ^
   56/1168 (4.79%) spills, 1112/1168 (95.21%) variables
   1 warning generated.


vim +/dr_ste_v0_build_eth_ipv6_l3_l4_tag +1170 drivers/net/ethernet/mellanox/mlx5/core/steering/dr_ste_v0.c

d65e841de80375 Yevgeny Kliteynik 2020-11-19  1168  
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1169  static int
d65e841de80375 Yevgeny Kliteynik 2020-11-19 @1170  dr_ste_v0_build_eth_ipv6_l3_l4_tag(struct mlx5dr_match_param *value,
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1171  				   struct mlx5dr_ste_build *sb,
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1172  				   u8 *tag)
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1173  {
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1174  	struct mlx5dr_match_spec *spec = sb->inner ? &value->inner : &value->outer;
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1175  	struct mlx5dr_match_misc *misc = &value->misc;
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1176  
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1177  	DR_STE_SET_TAG(eth_l4, tag, dst_port, spec, tcp_dport);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1178  	DR_STE_SET_TAG(eth_l4, tag, src_port, spec, tcp_sport);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1179  	DR_STE_SET_TAG(eth_l4, tag, dst_port, spec, udp_dport);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1180  	DR_STE_SET_TAG(eth_l4, tag, src_port, spec, udp_sport);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1181  	DR_STE_SET_TAG(eth_l4, tag, protocol, spec, ip_protocol);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1182  	DR_STE_SET_TAG(eth_l4, tag, fragmented, spec, frag);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1183  	DR_STE_SET_TAG(eth_l4, tag, dscp, spec, ip_dscp);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1184  	DR_STE_SET_TAG(eth_l4, tag, ecn, spec, ip_ecn);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1185  	DR_STE_SET_TAG(eth_l4, tag, ipv6_hop_limit, spec, ttl_hoplimit);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1186  
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1187  	if (sb->inner)
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1188  		DR_STE_SET_TAG(eth_l4, tag, flow_label, misc, inner_ipv6_flow_label);
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1189  	else
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1190  		DR_STE_SET_TAG(eth_l4, tag, flow_label, misc, outer_ipv6_flow_label);
0733535d59e154 Yevgeny Kliteynik 2021-07-04  1191  
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1192  	if (spec->tcp_flags) {
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1193  		DR_STE_SET_TCP_FLAGS(eth_l4, tag, spec);
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1194  		spec->tcp_flags = 0;
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1195  	}
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1196  
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1197  	return 0;
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1198  }
d65e841de80375 Yevgeny Kliteynik 2020-11-19  1199  

:::::: The code at line 1170 was first introduced by commit
:::::: d65e841de80375372f9842ed71756d3b90d96dc4 net/mlx5: DR, Move HW STEv0 match logic to a separate file

:::::: TO: Yevgeny Kliteynik <kliteyn@...dia.com>
:::::: CC: Saeed Mahameed <saeedm@...dia.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests

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