[atishp04:dma_non_coherent_v1 3/5] drivers/soc/sifive/sifive_l2_cache.c:55:6: warning: no previous prototype for function 'sifive_l2_flush64_range'
11:39 a.m.
tree: https://github.com/atishp04/linux dma_non_coherent_v1
head: 37cdb4f054939f097f3297ec76c1c6738312c577
commit: 3113512fedbd15cf6a83a08b18405fbcfb8d8985 [3/5] sifive/sifive_l2_cache: Align the
address to cache line
config: riscv-randconfig-r005-20210618 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project
d1baf2895467735ab14f4b3415fce204c0cc8e7f)
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/atishp04/linux/commit/3113512fedbd15cf6a83a08b18405fbc...
git remote add atishp04 https://github.com/atishp04/linux
git fetch --no-tags atishp04 dma_non_coherent_v1
git checkout 3113512fedbd15cf6a83a08b18405fbcfb8d8985
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp(a)intel.com>
All warnings (new ones prefixed by >>):
arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
#define inw(c) ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE +
(c))); __io_par(__v); __v; })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
#define readw_cpu(c) ({ u16 __r = le16_to_cpu((__force
__le16)__raw_readw(c)); __r; })
^
include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro
'__le16_to_cpu'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/soc/sifive/sifive_l2_cache.c:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
return inl(addr);
^~~~~~~~~
arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
#define inl(c) ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE +
(c))); __io_par(__v); __v; })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
#define readl_cpu(c) ({ u32 __r = le32_to_cpu((__force
__le32)__raw_readl(c)); __r; })
^
include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro
'__le32_to_cpu'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/soc/sifive/sifive_l2_cache.c:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
outb(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
#define outb(v,c) ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c)));
__io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
#define writeb_cpu(v, c) ((void)__raw_writeb((v), (c)))
^
In file included from drivers/soc/sifive/sifive_l2_cache.c:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
outw(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
#define outw(v,c) ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c)));
__io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
#define writew_cpu(v, c) ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
^
In file included from drivers/soc/sifive/sifive_l2_cache.c:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null
pointer has undefined behavior [-Wnull-pointer-arithmetic]
outl(value, addr);
^~~~~~~~~~~~~~~~~
arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
#define outl(v,c) ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c)));
__io_paw(); })
~~~~~~~~~~ ^
arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
#define writel_cpu(v, c) ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
^
In file included from drivers/soc/sifive/sifive_l2_cache.c:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/riscv/include/asm/io.h:149:
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;
~~~~~~~~~~ ^
drivers/soc/sifive/sifive_l2_cache.c:75:22: error: use of undeclared identifier
'CONFIG_SIFIVE_L2_FLUSH_START'
(start + len) > (CONFIG_SIFIVE_L2_FLUSH_START +
^
drivers/soc/sifive/sifive_l2_cache.c:76:9: error: use of undeclared identifier
'CONFIG_SIFIVE_L2_FLUSH_SIZE'
CONFIG_SIFIVE_L2_FLUSH_SIZE)) {
^
drivers/soc/sifive/sifive_l2_cache.c:74:13: error: use of undeclared identifier
'CONFIG_SIFIVE_L2_FLUSH_START'
if(start < CONFIG_SIFIVE_L2_FLUSH_START ||
^
> drivers/soc/sifive/sifive_l2_cache.c:55:6: warning: no previous
prototype for function 'sifive_l2_flush64_range' [-Wmissing-prototypes]
void sifive_l2_flush64_range(unsigned long start, unsigned long len)
^
drivers/soc/sifive/sifive_l2_cache.c:55:1: note: declare 'static' if the
function is not intended to be used outside of this translation unit
void sifive_l2_flush64_range(unsigned long start, unsigned long len)
^
static
8 warnings and 3 errors generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for LOCKDEP
Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER ||
MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
Selected by
- DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
WARNING: unmet direct dependencies detected for ERRATA_SIFIVE
Depends on RISCV_ERRATA_ALTERNATIVE
Selected by
- SOC_SIFIVE
vim +/sifive_l2_flush64_range +55 drivers/soc/sifive/sifive_l2_cache.c
54
55 void sifive_l2_flush64_range(unsigned long start, unsigned long
len)
56 {
57 unsigned long line;
58
59 if(!l2_base) {
60 pr_warn("L2CACHE: base addr invalid, skipping flush\n");
61 return;
62 }
63
64 /* TODO: if (len == 0), skipping flush or going on? */
65 if(!len) {
66 pr_debug("L2CACHE: flush64 range @ 0x%lx(len:0)\n", start);
67 return;
68 }
69
70 len = len + (start % SIFIVE_L2_FLUSH64_LINE_LEN);
71 start = ALIGN_DOWN(start, SIFIVE_L2_FLUSH64_LINE_LEN);
72
73 /* make sure the address is in the range */
74 if(start < CONFIG_SIFIVE_L2_FLUSH_START ||
75 (start + len) > (CONFIG_SIFIVE_L2_FLUSH_START +
76 CONFIG_SIFIVE_L2_FLUSH_SIZE)) {
77 WARN(1, "L2CACHE: flush64 out of range: %lx(%lx), skip flush\n",
78 start, len);
79 return;
80 }
81
82 mb(); /* sync */
83 for (line = start; line < start + len;
84 line += SIFIVE_L2_FLUSH64_LINE_LEN) {
85 writeq(line, l2_base + SIFIVE_L2_FLUSH64);
86 mb();
87 }
88 }
89
---
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