linux-kernel - Re: [PATCH v2 1/2] misc: fastrpc: Refactor mmap and munmap logic into helper functions

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Message-ID: <202511291834.zu81Ud77-lkp@intel.com>
Date: Sat, 29 Nov 2025 19:10:09 +0800
From: kernel test robot <lkp@...el.com>
To: Ekansh Gupta <ekansh.gupta@....qualcomm.com>, srini@...nel.org,
	linux-arm-msm@...r.kernel.org
Cc: oe-kbuild-all@...ts.linux.dev, gregkh@...uxfoundation.org,
	quic_bkumar@...cinc.com, linux-kernel@...r.kernel.org,
	quic_chennak@...cinc.com, dri-devel@...ts.freedesktop.org,
	arnd@...db.de, dmitry.baryshkov@....qualcomm.com
Subject: Re: [PATCH v2 1/2] misc: fastrpc: Refactor mmap and munmap logic
 into helper functions

Hi Ekansh,

kernel test robot noticed the following build warnings:

[auto build test WARNING on char-misc/char-misc-testing]
[also build test WARNING on char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.18-rc7 next-20251128]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ekansh-Gupta/misc-fastrpc-Refactor-mmap-and-munmap-logic-into-helper-functions/20251128-183620
base:   char-misc/char-misc-testing
patch link:    https://lore.kernel.org/r/20251128103428.1119696-2-ekansh.gupta%40oss.qualcomm.com
patch subject: [PATCH v2 1/2] misc: fastrpc: Refactor mmap and munmap logic into helper functions
config: arm-allyesconfig (https://download.01.org/0day-ci/archive/20251129/202511291834.zu81Ud77-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251129/202511291834.zu81Ud77-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/202511291834.zu81Ud77-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/misc/fastrpc.c: In function 'fastrpc_req_munmap_dsp':
>> drivers/misc/fastrpc.c:1825:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1825 |         args[0].ptr = (u64) &req_msg;
         |                       ^
   drivers/misc/fastrpc.c: In function 'fastrpc_req_map_dsp':
   drivers/misc/fastrpc.c:1897:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1897 |         args[0].ptr = (u64)&req_msg;
         |                       ^
   drivers/misc/fastrpc.c:1903:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1903 |         args[1].ptr = (u64)&pages;
         |                       ^
   drivers/misc/fastrpc.c:1906:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
    1906 |         args[2].ptr = (u64)&rsp_msg;
         |                       ^


vim +1825 drivers/misc/fastrpc.c

  1813	
  1814	static int fastrpc_req_munmap_dsp(struct fastrpc_user *fl, u64 raddr, u64 size)
  1815	{
  1816		struct fastrpc_invoke_args args[1] = { [0] = { 0 } };
  1817		struct fastrpc_munmap_req_msg req_msg;
  1818		int err;
  1819		u32 sc;
  1820	
  1821		req_msg.client_id = fl->client_id;
  1822		req_msg.size = size;
  1823		req_msg.vaddr = raddr;
  1824	
> 1825		args[0].ptr = (u64) &req_msg;
  1826		args[0].length = sizeof(req_msg);
  1827	
  1828		sc = FASTRPC_SCALARS(FASTRPC_RMID_INIT_MUNMAP, 1, 0);
  1829		err = fastrpc_internal_invoke(fl, true, FASTRPC_INIT_HANDLE, sc,
  1830					      &args[0]);
  1831	
  1832		return err;
  1833	}
  1834	

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