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Date: Thu, 9 Jun 2022 19:36:17 +0800
From: kernel test robot <lkp@...el.com>
To: Heiko Stuebner <heiko@...ech.de>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>
Subject: [avpatel:virtio_rpmsg_bus_fix_v1 45/52]
arch/riscv/mm/dma-noncoherent.c:65:6: warning: no previous prototype for
function 'riscv_init_cbom_blocksize'
tree: https://github.com/avpatel/linux.git virtio_rpmsg_bus_fix_v1
head: 390aaf641ff2f8919268d611e864227265c3f3f2
commit: 3485f5450237db107c3601d2b726458fb98027a6 [45/52] riscv: Implement Zicbom-based cache management operations
config: riscv-randconfig-r042-20220609 (https://download.01.org/0day-ci/archive/20220609/202206091918.fF8xyBBM-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project b92436efcb7813fc481b30f2593a4907568d917a)
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 riscv cross compiling tool for clang build
# apt-get install binutils-riscv64-linux-gnu
# https://github.com/avpatel/linux/commit/3485f5450237db107c3601d2b726458fb98027a6
git remote add avpatel https://github.com/avpatel/linux.git
git fetch --no-tags avpatel virtio_rpmsg_bus_fix_v1
git checkout 3485f5450237db107c3601d2b726458fb98027a6
# 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=riscv SHELL=/bin/bash arch/riscv/mm/ kernel/dma/
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>
All error/warnings (new ones prefixed by >>):
In file included from arch/riscv/mm/dma-noncoherent.c:8:
In file included from include/linux/dma-direct.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from arch/riscv/mm/dma-noncoherent.c:8:
In file included from include/linux/dma-direct.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from arch/riscv/mm/dma-noncoherent.c:8:
In file included from include/linux/dma-direct.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> arch/riscv/mm/dma-noncoherent.c:65:6: warning: no previous prototype for function 'riscv_init_cbom_blocksize' [-Wmissing-prototypes]
void riscv_init_cbom_blocksize(void)
^
arch/riscv/mm/dma-noncoherent.c:65:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void riscv_init_cbom_blocksize(void)
^
static
>> arch/riscv/mm/dma-noncoherent.c:89:6: warning: variable 'cbom_hartid' is uninitialized when used here [-Wuninitialized]
cbom_hartid, hartid);
^~~~~~~~~~~
include/linux/printk.h:528:37: note: expanded from macro 'pr_warn'
printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/printk.h:475:60: note: expanded from macro 'printk'
#define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
^~~~~~~~~~~
include/linux/printk.h:447:19: note: expanded from macro 'printk_index_wrap'
_p_func(_fmt, ##__VA_ARGS__); \
^~~~~~~~~~~
arch/riscv/mm/dma-noncoherent.c:73:18: note: initialize the variable 'cbom_hartid' to silence this warning
int cbom_hartid;
^
= 0
9 warnings generated.
--
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from kernel/dma/pool.c:8:
In file included from include/linux/dma-map-ops.h:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/riscv/include/asm/io.h:136:
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:1024:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
~~~~~~~~~~ ^
>> kernel/dma/pool.c:105:9: error: call to undeclared function 'pgprot_dmacoherent'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
pgprot_dmacoherent(PAGE_KERNEL),
^
>> kernel/dma/pool.c:105:9: error: passing 'int' to parameter of incompatible type 'pgprot_t'
pgprot_dmacoherent(PAGE_KERNEL),
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/dma-map-ops.h:235:76: note: passing argument to parameter 'prot' here
void *dma_common_contiguous_remap(struct page *page, size_t size, pgprot_t prot,
^
7 warnings and 2 errors generated.
vim +/riscv_init_cbom_blocksize +65 arch/riscv/mm/dma-noncoherent.c
64
> 65 void riscv_init_cbom_blocksize(void)
66 {
67 struct device_node *node;
68 int ret;
69 u32 val;
70
71 for_each_of_cpu_node(node) {
72 int hartid = riscv_of_processor_hartid(node);
73 int cbom_hartid;
74
75 if (hartid < 0)
76 continue;
77
78 /* set block-size for cbom extension if available */
79 ret = of_property_read_u32(node, "riscv,cbom-block-size", &val);
80 if (ret)
81 continue;
82
83 if (!riscv_cbom_block_size) {
84 riscv_cbom_block_size = val;
85 cbom_hartid = hartid;
86 } else {
87 if (riscv_cbom_block_size != val)
88 pr_warn("cbom-block-size mismatched between harts %d and %d\n",
> 89 cbom_hartid, hartid);
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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