drivers/mux/mmio.c:76:20: error: variable has incomplete type 'struct reg_field'

From: kernel test robot
Date: Sat Feb 18 2023 - 15:40:22 EST

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Hi Aswath,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 38f8ccde04a3fa317b51b05e63c3cb57e1641931
commit: e4d4371253029528c02bfb43a46c252e1c3d035f phy: phy-can-transceiver: Add support for setting mux
date: 10 months ago
config: s390-randconfig-r001-20230219 (https://download.01.org/0day-ci/archive/20230219/202302190449.Hm6Psb2N-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 s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e4d4371253029528c02bfb43a46c252e1c3d035f
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout e4d4371253029528c02bfb43a46c252e1c3d035f
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/mux/

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/202302190449.Hm6Psb2N-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

In file included from drivers/mux/mmio.c:16:
In file included from include/linux/regmap.h:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:464:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __raw_readb(PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:477:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from drivers/mux/mmio.c:16:
In file included from include/linux/regmap.h:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:490:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from drivers/mux/mmio.c:16:
In file included from include/linux/regmap.h:20:
In file included from include/linux/iopoll.h:14:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
include/asm-generic/io.h:501:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writeb(value, PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:511:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:521:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
include/asm-generic/io.h:609:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:617:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:625:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
readsl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:634:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesb(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:643:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesw(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
include/asm-generic/io.h:652:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/mux/mmio.c:76:20: error: variable has incomplete type 'struct reg_field'
struct reg_field field;
^
drivers/mux/mmio.c:76:10: note: forward declaration of 'struct reg_field'
struct reg_field field;
^
>> drivers/mux/mmio.c:102:15: error: call to undeclared function 'devm_regmap_field_alloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
fields[i] = devm_regmap_field_alloc(dev, regmap, field);
^
12 warnings and 2 errors generated.

vim +76 drivers/mux/mmio.c

73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 35
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 36 static int mux_mmio_probe(struct platform_device *pdev)
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 37 {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 38 struct device *dev = &pdev->dev;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 39 struct device_node *np = dev->of_node;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 40 struct regmap_field **fields;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 41 struct mux_chip *mux_chip;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 42 struct regmap *regmap;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 43 int num_fields;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 44 int ret;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 45 int i;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 46
8ecfaca7926f4b drivers/mux/mmio.c Pankaj Bansal 2019-06-12 47 if (of_device_is_compatible(np, "mmio-mux"))
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 48 regmap = syscon_node_to_regmap(np->parent);
8ecfaca7926f4b drivers/mux/mmio.c Pankaj Bansal 2019-06-12 49 else
8ecfaca7926f4b drivers/mux/mmio.c Pankaj Bansal 2019-06-12 50 regmap = dev_get_regmap(dev->parent, NULL) ?: ERR_PTR(-ENODEV);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 51 if (IS_ERR(regmap)) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 52 ret = PTR_ERR(regmap);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 53 dev_err(dev, "failed to get regmap: %d\n", ret);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 54 return ret;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 55 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 56
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 57 ret = of_property_count_u32_elems(np, "mux-reg-masks");
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 58 if (ret == 0 || ret % 2)
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 59 ret = -EINVAL;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 60 if (ret < 0) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 61 dev_err(dev, "mux-reg-masks property missing or invalid: %d\n",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 62 ret);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 63 return ret;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 64 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 65 num_fields = ret / 2;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 66
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 67 mux_chip = devm_mux_chip_alloc(dev, num_fields, num_fields *
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 68 sizeof(*fields));
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 69 if (IS_ERR(mux_chip))
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 70 return PTR_ERR(mux_chip);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 71
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 72 fields = mux_chip_priv(mux_chip);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 73
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 74 for (i = 0; i < num_fields; i++) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 75 struct mux_control *mux = &mux_chip->mux[i];
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 @76 struct reg_field field;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 77 s32 idle_state = MUX_IDLE_AS_IS;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 78 u32 reg, mask;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 79 int bits;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 80
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 81 ret = of_property_read_u32_index(np, "mux-reg-masks",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 82 2 * i, &reg);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 83 if (!ret)
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 84 ret = of_property_read_u32_index(np, "mux-reg-masks",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 85 2 * i + 1, &mask);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 86 if (ret < 0) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 87 dev_err(dev, "bitfield %d: failed to read mux-reg-masks property: %d\n",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 88 i, ret);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 89 return ret;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 90 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 91
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 92 field.reg = reg;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 93 field.msb = fls(mask) - 1;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 94 field.lsb = ffs(mask) - 1;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 95
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 96 if (mask != GENMASK(field.msb, field.lsb)) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 97 dev_err(dev, "bitfield %d: invalid mask 0x%x\n",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 98 i, mask);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 99 return -EINVAL;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 100 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 101
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 @102 fields[i] = devm_regmap_field_alloc(dev, regmap, field);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 103 if (IS_ERR(fields[i])) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 104 ret = PTR_ERR(fields[i]);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 105 dev_err(dev, "bitfield %d: failed allocate: %d\n",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 106 i, ret);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 107 return ret;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 108 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 109
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 110 bits = 1 + field.msb - field.lsb;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 111 mux->states = 1 << bits;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 112
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 113 of_property_read_u32_index(np, "idle-states", i,
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 114 (u32 *)&idle_state);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 115 if (idle_state != MUX_IDLE_AS_IS) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 116 if (idle_state < 0 || idle_state >= mux->states) {
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 117 dev_err(dev, "bitfield: %d: out of range idle state %d\n",
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 118 i, idle_state);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 119 return -EINVAL;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 120 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 121
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 122 mux->idle_state = idle_state;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 123 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 124 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 125
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 126 mux_chip->ops = &mux_mmio_ops;
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 127
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 128 return devm_mux_chip_register(dev, mux_chip);
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 129 }
73726380a26fa1 drivers/mux/mux-mmio.c Philipp Zabel 2017-05-14 130

:::::: The code at line 76 was first introduced by commit
:::::: 73726380a26fa1ed490f30fccee10ed9da28dc0c mux: mmio-based syscon mux controller

:::::: TO: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

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

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