linux-kernel - [mingo-tip:sched/headers 1496/2356] drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:956:22: warning: assignment to 'struct task_struct *' from 'int' makes pointer from integer without a cast

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Date:   Tue, 19 Apr 2022 12:32:46 +0800
From:   kernel test robot <lkp@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [mingo-tip:sched/headers 1496/2356]
 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:956:22: warning:
 assignment to 'struct task_struct *' from 'int' makes pointer from integer
 without a cast

tree:   git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git sched/headers
head:   af93551cf39027d176f30b9beafc60a4c130998a
commit: 87052c4c3bbc437e628c8d687fd5133d135333d0 [1496/2356] headers/deps: fs: Optimize <linux/fs.h> header dependencies
config: x86_64-randconfig-a001-20220418 (https://download.01.org/0day-ci/archive/20220419/202204191227.MN9RvyB5-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.2.0-19) 11.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git/commit/?id=87052c4c3bbc437e628c8d687fd5133d135333d0
        git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git
        git fetch --no-tags mingo-tip sched/headers
        git checkout 87052c4c3bbc437e628c8d687fd5133d135333d0
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/coco/ arch/x86/kernel/cpu/mtrr/ drivers/bus/mhi/host/ drivers/gpu/drm/amd/amdgpu/ drivers/gpu/drm/amd/amdkfd/ drivers/hwmon/pmbus/ drivers/infiniband/sw/siw/ drivers/net/can/spi/mcp251xfd/ drivers/spi/ mm/ sound/soc/codecs/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_chardev.c: In function 'criu_resume':
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_chardev.c:2458:15: error: implicit declaration of function 'find_get_pid'; did you mean 'find_get_page'? [-Werror=implicit-function-declaration]
    2458 |         pid = find_get_pid(args->pid);
         |               ^~~~~~~~~~~~
         |               find_get_page
>> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_chardev.c:2458:13: warning: assignment to 'struct pid *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
    2458 |         pid = find_get_pid(args->pid);
         |             ^
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_chardev.c:2467:9: error: implicit declaration of function 'put_pid'; did you mean 'put_pid_ns'? [-Werror=implicit-function-declaration]
    2467 |         put_pid(pid);
         |         ^~~~~~~
         |         put_pid_ns
   cc1: some warnings being treated as errors
--
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c: In function 'kfd_lookup_process_by_pid':
   drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:956:24: error: implicit declaration of function 'get_pid_task'; did you mean 'get_cpu_mask'? [-Werror=implicit-function-declaration]
     956 |                 task = get_pid_task(pid, PIDTYPE_PID);
         |                        ^~~~~~~~~~~~
         |                        get_cpu_mask
>> drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c:956:22: warning: assignment to 'struct task_struct *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
     956 |                 task = get_pid_task(pid, PIDTYPE_PID);
         |                      ^
   cc1: some warnings being treated as errors


vim +956 drivers/gpu/drm/amd/amdgpu/../amdkfd/kfd_process.c

abb208a8d490ba Felix Kuehling    2017-11-27  945  
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  946  /* This increments the process->ref counter. */
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  947  struct kfd_process *kfd_lookup_process_by_pid(struct pid *pid)
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  948  {
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  949  	struct task_struct *task = NULL;
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  950  	struct kfd_process *p    = NULL;
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  951  
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  952  	if (!pid) {
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  953  		task = current;
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  954  		get_task_struct(task);
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  955  	} else {
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11 @956  		task = get_pid_task(pid, PIDTYPE_PID);
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  957  	}
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  958  
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  959  	if (task) {
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  960  		p = find_process(task, true);
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  961  		put_task_struct(task);
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  962  	}
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  963  
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  964  	return p;
011bbb03024f5a Rajneesh Bhardwaj 2021-01-11  965  }
6ae2784114c037 Alex Sierra       2020-04-01  966  

:::::: The code at line 956 was first introduced by commit
:::::: 011bbb03024f5a22dc04eba370f9296f0cb83502 drm/amdkfd: CRIU Implement KFD resume ioctl

:::::: TO: Rajneesh Bhardwaj <rajneesh.bhardwaj@....com>
:::::: CC: Alex Deucher <alexander.deucher@....com>

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