linux-kernel - drivers/i3c/internals.h:54:9: error: passing 'const void *' to parameter of type 'void *' discards qualifiers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <202508070438.TZZA3f2S-lkp@intel.com>
Date: Thu, 7 Aug 2025 04:40:17 +0800
From: kernel test robot <lkp@...el.com>
To: Wolfram Sang <wsa-dev@...g-engineering.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-kernel@...r.kernel.org,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Frank Li <Frank.Li@....com>
Subject: drivers/i3c/internals.h:54:9: error: passing 'const void *' to
 parameter of type 'void *' discards qualifiers

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   cca7a0aae8958c9b1cd14116cb8b2f22ace2205e
commit: 3b661ca549b9e5bb11d0bc97ada6110aac3282d2 i3c: add missing include to internal header
date:   7 days ago
config: sparc64-randconfig-002-20250807 (https://download.01.org/0day-ci/archive/20250807/202508070438.TZZA3f2S-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 7b8dea265e72c3037b6b1e54d5ab51b7e14f328b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250807/202508070438.TZZA3f2S-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508070438.TZZA3f2S-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@...log.com>
:::::: CC: Alexandre Belloni <alexandre.belloni@...tlin.com>

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