From: Alexandre Belloni <alexandre.belloni@bootlin.com>
To: kernel test robot <lkp@intel.com>
Cc: Wolfram Sang <wsa-dev@sang-engineering.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/internals.h:54:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers
Date: Sun, 21 Sep 2025 23:48:05 +0200 [thread overview]
Message-ID: <202509212148052be5ea9d@mail.local> (raw)
In-Reply-To: <202509212320.yCuqvnVn-lkp@intel.com>
Hello,
On 21/09/2025 23:54:32+0800, kernel test robot wrote:
> Hi Wolfram,
>
> FYI, the error/warning still remains.
>
As replied multiple times, the error is in the sparc64 code, not i3c.
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: f975f08c2e899ae2484407d7bba6bb7f8b6d9d40
> commit: 3b661ca549b9e5bb11d0bc97ada6110aac3282d2 i3c: add missing include to internal header
> date: 8 weeks ago
> config: sparc64-randconfig-001-20250921 (https://download.01.org/0day-ci/archive/20250921/202509212320.yCuqvnVn-lkp@intel.com/config)
> compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 7c861bcedf61607b6c087380ac711eb7ff918ca6)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250921/202509212320.yCuqvnVn-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/202509212320.yCuqvnVn-lkp@intel.com/
>
> All errors (new ones prefixed by >>):
>
> In file included from drivers/i3c/master.c:21:
> >> drivers/i3c/internals.h:54:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
> 54 | 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 +54 drivers/i3c/internals.h
>
> 733b439375b494 Jorge Marques 2025-06-24 44
> 733b439375b494 Jorge Marques 2025-06-24 45 /**
> 733b439375b494 Jorge Marques 2025-06-24 46 * i3c_readl_fifo - Read data buffer from 32bit FIFO
> 733b439375b494 Jorge Marques 2025-06-24 47 * @addr: FIFO Address to read from
> 733b439375b494 Jorge Marques 2025-06-24 48 * @buf: Pointer to the buffer to store read bytes
> 733b439375b494 Jorge Marques 2025-06-24 49 * @nbytes: Number of bytes to read
> 733b439375b494 Jorge Marques 2025-06-24 50 */
> 733b439375b494 Jorge Marques 2025-06-24 51 static inline void i3c_readl_fifo(const void __iomem *addr, void *buf,
> 733b439375b494 Jorge Marques 2025-06-24 52 int nbytes)
> 733b439375b494 Jorge Marques 2025-06-24 53 {
> 733b439375b494 Jorge Marques 2025-06-24 @54 readsl(addr, buf, nbytes / 4);
> 733b439375b494 Jorge Marques 2025-06-24 55 if (nbytes & 3) {
> 733b439375b494 Jorge Marques 2025-06-24 56 u32 tmp;
> 733b439375b494 Jorge Marques 2025-06-24 57
> 733b439375b494 Jorge Marques 2025-06-24 58 tmp = readl(addr);
> 733b439375b494 Jorge Marques 2025-06-24 59 memcpy(buf + (nbytes & ~3), &tmp, nbytes & 3);
> 733b439375b494 Jorge Marques 2025-06-24 60 }
> 733b439375b494 Jorge Marques 2025-06-24 61 }
> 733b439375b494 Jorge Marques 2025-06-24 62
>
> :::::: The code at line 54 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
next prev parent reply other threads:[~2025-09-21 21:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-21 15:54 drivers/i3c/internals.h:54:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers kernel test robot
2025-09-21 21:48 ` Alexandre Belloni [this message]
2025-09-22 0:17 ` Philip Li
2025-09-22 6:31 ` Geert Uytterhoeven
-- strict thread matches above, loose matches on Subject: below --
2025-08-06 20:40 kernel test robot
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