From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: kernel test robot <lkp@intel.com>
Cc: Jorge Marques <jorge.marques@analog.com>,
llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
linux-kernel@vger.kernel.org, Frank Li <Frank.Li@nxp.com>
Subject: Re: drivers/i3c/master/../internals.h:53:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers
Date: Mon, 1 Sep 2025 09:26:35 +0200 [thread overview]
Message-ID: <20250901072635d908c251@mail.local> (raw)
In-Reply-To: <202509011442.yweEPWw4-lkp@intel.com>
Hello,
On 01/09/2025 14:25:03+0800, kernel test robot wrote:
> Hi Jorge,
>
> FYI, the error/warning still remains.
The issue is not in the i3c code but in the sparc64 code.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: b320789d6883cc00ac78ce83bccbfe7ed58afcf0
> commit: c20d3fa7049144f519b21616e6020e6939822145 i3c: master: cdns: Use i3c_writel_fifo() and i3c_readl_fifo()
> date: 5 weeks ago
> config: sparc64-randconfig-001-20250901 (https://download.01.org/0day-ci/archive/20250901/202509011442.yweEPWw4-lkp@intel.com/config)
> compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250901/202509011442.yweEPWw4-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202509011442.yweEPWw4-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> In file included from drivers/i3c/master/i3c-master-cdns.c:26:
> >> drivers/i3c/master/../internals.h:53:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
> 53 | readsl(addr, buf, nbytes / 4);
> | ^~~~
> arch/sparc/include/asm/io_64.h:265:41: note: passing argument to parameter 'port' here
> 265 | static inline void readsl(void __iomem *port, void *buf, unsigned long count)
> | ^
> 1 error generated.
>
>
> vim +53 drivers/i3c/master/../internals.h
>
> 733b439375b494 Jorge Marques 2025-06-24 43
> 733b439375b494 Jorge Marques 2025-06-24 44 /**
> 733b439375b494 Jorge Marques 2025-06-24 45 * i3c_readl_fifo - Read data buffer from 32bit FIFO
> 733b439375b494 Jorge Marques 2025-06-24 46 * @addr: FIFO Address to read from
> 733b439375b494 Jorge Marques 2025-06-24 47 * @buf: Pointer to the buffer to store read bytes
> 733b439375b494 Jorge Marques 2025-06-24 48 * @nbytes: Number of bytes to read
> 733b439375b494 Jorge Marques 2025-06-24 49 */
> 733b439375b494 Jorge Marques 2025-06-24 50 static inline void i3c_readl_fifo(const void __iomem *addr, void *buf,
> 733b439375b494 Jorge Marques 2025-06-24 51 int nbytes)
> 733b439375b494 Jorge Marques 2025-06-24 52 {
> 733b439375b494 Jorge Marques 2025-06-24 @53 readsl(addr, buf, nbytes / 4);
> 733b439375b494 Jorge Marques 2025-06-24 54 if (nbytes & 3) {
> 733b439375b494 Jorge Marques 2025-06-24 55 u32 tmp;
> 733b439375b494 Jorge Marques 2025-06-24 56
> 733b439375b494 Jorge Marques 2025-06-24 57 tmp = readl(addr);
> 733b439375b494 Jorge Marques 2025-06-24 58 memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
> 733b439375b494 Jorge Marques 2025-06-24 59 }
> 733b439375b494 Jorge Marques 2025-06-24 60 }
> 733b439375b494 Jorge Marques 2025-06-24 61
>
> :::::: The code at line 53 was first introduced by commit
> :::::: 733b439375b494e8a6950ab47d18a4b615b73cb3 i3c: master: Add inline i3c_readl_fifo() and i3c_writel_fifo()
>
> :::::: TO: Jorge Marques <jorge.marques@analog.com>
> :::::: CC: Alexandre Belloni <alexandre.belloni@bootlin.com>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
--
Alexandre Belloni, co-owner and COO, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com
prev parent reply other threads:[~2025-09-01 7:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-01 6:25 drivers/i3c/master/../internals.h:53:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers kernel test robot
2025-09-01 7:26 ` Alexandre Belloni [this message]
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