drivers/dma/dw-edma/dw-edma-v0-regs.h:37:4: warning: field sar within 'struct dw_edma_v0_ch_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:31:2)' and is usually due to 'struct dw_edma_v0_ch_regs' being packed, wh...
From: kernel test robot
Date: Mon Sep 19 2022 - 17:20:41 EST
Hi Gustavo,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 521a547ced6477c54b4b0cc206000406c221b4d6
commit: 04e0a39fc10f82a71b84af73351333b184cee578 dmaengine: dw-edma: Add writeq() and readq() for 64 bits architectures
date: 1 year, 6 months ago
config: arm-buildonly-randconfig-r006-20220919 (https://download.01.org/0day-ci/archive/20220920/202209200522.1lOqXue9-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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=04e0a39fc10f82a71b84af73351333b184cee578
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 04e0a39fc10f82a71b84af73351333b184cee578
# 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 SHELL=/bin/bash drivers/dma/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>
All warnings (new ones prefixed by >>):
In file included from drivers/dma/dw-edma/dw-edma-v0-core.c:13:
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:37:4: warning: field sar within 'struct dw_edma_v0_ch_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:31:2)' and is usually due to 'struct dw_edma_v0_ch_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} sar;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:44:4: warning: field dar within 'struct dw_edma_v0_ch_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:38:2)' and is usually due to 'struct dw_edma_v0_ch_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} dar;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:51:4: warning: field llp within 'struct dw_edma_v0_ch_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:45:2)' and is usually due to 'struct dw_edma_v0_ch_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} llp;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:172:4: warning: field rd_err_status within 'struct dw_edma_v0_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:166:2)' and is usually due to 'struct dw_edma_v0_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} rd_err_status;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:182:4: warning: field rd_done_imwr within 'struct dw_edma_v0_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:176:2)' and is usually due to 'struct dw_edma_v0_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} rd_done_imwr;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:189:4: warning: field rd_abort_imwr within 'struct dw_edma_v0_regs' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:183:2)' and is usually due to 'struct dw_edma_v0_regs' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} rd_abort_imwr;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:71:4: warning: field wr_engine_hshake_cnt within 'struct dw_edma_v0_unroll' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:65:2)' and is usually due to 'struct dw_edma_v0_unroll' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} wr_engine_hshake_cnt;
^
>> drivers/dma/dw-edma/dw-edma-v0-regs.h:79:4: warning: field rd_engine_hshake_cnt within 'struct dw_edma_v0_unroll' is less aligned than 'union (unnamed union at drivers/dma/dw-edma/dw-edma-v0-regs.h:73:2)' and is usually due to 'struct dw_edma_v0_unroll' being packed, which can lead to unaligned accesses [-Wunaligned-access]
} rd_engine_hshake_cnt;
^
8 warnings generated.
vim +37 drivers/dma/dw-edma/dw-edma-v0-regs.h
26
27 struct dw_edma_v0_ch_regs {
28 u32 ch_control1; /* 0x000 */
29 u32 ch_control2; /* 0x004 */
30 u32 transfer_size; /* 0x008 */
31 union {
32 u64 reg; /* 0x00c..0x010 */
33 struct {
34 u32 lsb; /* 0x00c */
35 u32 msb; /* 0x010 */
36 };
> 37 } sar;
38 union {
39 u64 reg; /* 0x014..0x018 */
40 struct {
41 u32 lsb; /* 0x014 */
42 u32 msb; /* 0x018 */
43 };
> 44 } dar;
45 union {
46 u64 reg; /* 0x01c..0x020 */
47 struct {
48 u32 lsb; /* 0x01c */
49 u32 msb; /* 0x020 */
50 };
> 51 } llp;
52 } __packed;
53
54 struct dw_edma_v0_ch {
55 struct dw_edma_v0_ch_regs wr; /* 0x200 */
56 u32 padding_1[55]; /* [0x224..0x2fc] */
57 struct dw_edma_v0_ch_regs rd; /* 0x300 */
58 u32 padding_2[55]; /* [0x324..0x3fc] */
59 } __packed;
60
61 struct dw_edma_v0_unroll {
62 u32 padding_1; /* 0x0f8 */
63 u32 wr_engine_chgroup; /* 0x100 */
64 u32 rd_engine_chgroup; /* 0x104 */
65 union {
66 u64 reg; /* 0x108..0x10c */
67 struct {
68 u32 lsb; /* 0x108 */
69 u32 msb; /* 0x10c */
70 };
> 71 } wr_engine_hshake_cnt;
72 u32 padding_2[2]; /* [0x110..0x114] */
73 union {
74 u64 reg; /* 0x120..0x124 */
75 struct {
76 u32 lsb; /* 0x120 */
77 u32 msb; /* 0x124 */
78 };
> 79 } rd_engine_hshake_cnt;
80 u32 padding_3[2]; /* [0x120..0x124] */
81 u32 wr_ch0_pwr_en; /* 0x128 */
82 u32 wr_ch1_pwr_en; /* 0x12c */
83 u32 wr_ch2_pwr_en; /* 0x130 */
84 u32 wr_ch3_pwr_en; /* 0x134 */
85 u32 wr_ch4_pwr_en; /* 0x138 */
86 u32 wr_ch5_pwr_en; /* 0x13c */
87 u32 wr_ch6_pwr_en; /* 0x140 */
88 u32 wr_ch7_pwr_en; /* 0x144 */
89 u32 padding_4[8]; /* [0x148..0x164] */
90 u32 rd_ch0_pwr_en; /* 0x168 */
91 u32 rd_ch1_pwr_en; /* 0x16c */
92 u32 rd_ch2_pwr_en; /* 0x170 */
93 u32 rd_ch3_pwr_en; /* 0x174 */
94 u32 rd_ch4_pwr_en; /* 0x178 */
95 u32 rd_ch5_pwr_en; /* 0x18c */
96 u32 rd_ch6_pwr_en; /* 0x180 */
97 u32 rd_ch7_pwr_en; /* 0x184 */
98 u32 padding_5[30]; /* [0x188..0x1fc] */
99 struct dw_edma_v0_ch ch[EDMA_V0_MAX_NR_CH]; /* [0x200..0x1120] */
100 } __packed;
101
102 struct dw_edma_v0_legacy {
103 u32 viewport_sel; /* 0x0f8 */
104 struct dw_edma_v0_ch_regs ch; /* [0x100..0x120] */
105 } __packed;
106
107 struct dw_edma_v0_regs {
108 /* eDMA global registers */
109 u32 ctrl_data_arb_prior; /* 0x000 */
110 u32 padding_1; /* 0x004 */
111 u32 ctrl; /* 0x008 */
112 u32 wr_engine_en; /* 0x00c */
113 u32 wr_doorbell; /* 0x010 */
114 u32 padding_2; /* 0x014 */
115 union {
116 u64 reg; /* 0x018..0x01c */
117 struct {
118 u32 lsb; /* 0x018 */
119 u32 msb; /* 0x01c */
120 };
121 } wr_ch_arb_weight;
122 u32 padding_3[3]; /* [0x020..0x028] */
123 u32 rd_engine_en; /* 0x02c */
124 u32 rd_doorbell; /* 0x030 */
125 u32 padding_4; /* 0x034 */
126 union {
127 u64 reg; /* 0x038..0x03c */
128 struct {
129 u32 lsb; /* 0x038 */
130 u32 msb; /* 0x03c */
131 };
132 } rd_ch_arb_weight;
133 u32 padding_5[3]; /* [0x040..0x048] */
134 /* eDMA interrupts registers */
135 u32 wr_int_status; /* 0x04c */
136 u32 padding_6; /* 0x050 */
137 u32 wr_int_mask; /* 0x054 */
138 u32 wr_int_clear; /* 0x058 */
139 u32 wr_err_status; /* 0x05c */
140 union {
141 u64 reg; /* 0x060..0x064 */
142 struct {
143 u32 lsb; /* 0x060 */
144 u32 msb; /* 0x064 */
145 };
146 } wr_done_imwr;
147 union {
148 u64 reg; /* 0x068..0x06c */
149 struct {
150 u32 lsb; /* 0x068 */
151 u32 msb; /* 0x06c */
152 };
153 } wr_abort_imwr;
154 u32 wr_ch01_imwr_data; /* 0x070 */
155 u32 wr_ch23_imwr_data; /* 0x074 */
156 u32 wr_ch45_imwr_data; /* 0x078 */
157 u32 wr_ch67_imwr_data; /* 0x07c */
158 u32 padding_7[4]; /* [0x080..0x08c] */
159 u32 wr_linked_list_err_en; /* 0x090 */
160 u32 padding_8[3]; /* [0x094..0x09c] */
161 u32 rd_int_status; /* 0x0a0 */
162 u32 padding_9; /* 0x0a4 */
163 u32 rd_int_mask; /* 0x0a8 */
164 u32 rd_int_clear; /* 0x0ac */
165 u32 padding_10; /* 0x0b0 */
166 union {
167 u64 reg; /* 0x0b4..0x0b8 */
168 struct {
169 u32 lsb; /* 0x0b4 */
170 u32 msb; /* 0x0b8 */
171 };
> 172 } rd_err_status;
173 u32 padding_11[2]; /* [0x0bc..0x0c0] */
174 u32 rd_linked_list_err_en; /* 0x0c4 */
175 u32 padding_12; /* 0x0c8 */
176 union {
177 u64 reg; /* 0x0cc..0x0d0 */
178 struct {
179 u32 lsb; /* 0x0cc */
180 u32 msb; /* 0x0d0 */
181 };
> 182 } rd_done_imwr;
183 union {
184 u64 reg; /* 0x0d4..0x0d8 */
185 struct {
186 u32 lsb; /* 0x0d4 */
187 u32 msb; /* 0x0d8 */
188 };
> 189 } rd_abort_imwr;
190 u32 rd_ch01_imwr_data; /* 0x0dc */
191 u32 rd_ch23_imwr_data; /* 0x0e0 */
192 u32 rd_ch45_imwr_data; /* 0x0e4 */
193 u32 rd_ch67_imwr_data; /* 0x0e8 */
194 u32 padding_13[4]; /* [0x0ec..0x0f8] */
195 /* eDMA channel context grouping */
196 union dw_edma_v0_type {
197 struct dw_edma_v0_legacy legacy; /* [0x0f8..0x120] */
198 struct dw_edma_v0_unroll unroll; /* [0x0f8..0x1120] */
199 } type;
200 } __packed;
201
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