Re: [RFC PATCH] drm: Add support for io_uring's uring_cmd in DRM/accel

[kernel test robot <lkp@intel.com>]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
In-Reply-To: <20250606180806.2193463-1-zachary.mckevitt@oss.qualcomm.com>
References: <20250606180806.2193463-1-zachary.mckevitt@oss.qualcomm.com>
TO: Zack McKevitt <zachary.mckevitt@oss.qualcomm.com>

Hi Zack,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on drm-exynos/exynos-drm-next]
[also build test WARNING on linus/master v6.15 next-20250606]
[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/Zack-McKevitt/drm-Add-support-for-io_uring-s-uring_cmd-in-DRM-accel/20250607-021118
base:   https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next
patch link:    https://lore.kernel.org/r/20250606180806.2193463-1-zachary.mckevitt%40oss.qualcomm.com
patch subject: [RFC PATCH] drm: Add support for io_uring's uring_cmd in DRM/accel
:::::: branch date: 25 hours ago
:::::: commit date: 25 hours ago
config: x86_64-randconfig-161-20250607 (https://download.01.org/0day-ci/archive/20250608/202506080322.Lsc4bCGT-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0

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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202506080322.Lsc4bCGT-lkp@intel.com/

smatch warnings:
drivers/gpu/drm/drm_ioctl.c:958 drm_uring_cmd() warn: statement has no effect 'const'

vim +/const +958 drivers/gpu/drm/drm_ioctl.c

09504f8ef576ed Zack McKevitt 2025-06-06  940  
09504f8ef576ed Zack McKevitt 2025-06-06  941  /**
09504f8ef576ed Zack McKevitt 2025-06-06  942   * drm_uring_cmd - Implement uring_cmd callback for io_uring
09504f8ef576ed Zack McKevitt 2025-06-06  943   * @cmd: pointer to io_uring_cmd struct
09504f8ef576ed Zack McKevitt 2025-06-06  944   * @issue_flags: flags specified by io_uring's issue implementation
09504f8ef576ed Zack McKevitt 2025-06-06  945   *
09504f8ef576ed Zack McKevitt 2025-06-06  946   * This function implements the uring_cmd file operation to incorporate
09504f8ef576ed Zack McKevitt 2025-06-06  947   * arbitrary io_uring functionality for drm. Currently, it acts as a way
09504f8ef576ed Zack McKevitt 2025-06-06  948   * for io_uring to issue ioctls to a drm device, so this function
09504f8ef576ed Zack McKevitt 2025-06-06  949   * dispatches ioctls to the standard drm ioctl interface.
09504f8ef576ed Zack McKevitt 2025-06-06  950   *
09504f8ef576ed Zack McKevitt 2025-06-06  951   * Returns:
09504f8ef576ed Zack McKevitt 2025-06-06  952   * Zero on success, negative error code on failure.
09504f8ef576ed Zack McKevitt 2025-06-06  953   */
09504f8ef576ed Zack McKevitt 2025-06-06  954  int drm_uring_cmd(struct io_uring_cmd *cmd, unsigned int issue_flags)
09504f8ef576ed Zack McKevitt 2025-06-06  955  {
09504f8ef576ed Zack McKevitt 2025-06-06  956  	switch (cmd->cmd_op) {
09504f8ef576ed Zack McKevitt 2025-06-06  957  	case DRM_URING_CMD_IOCTL:
09504f8ef576ed Zack McKevitt 2025-06-06 @958  		const struct drm_uring_cmd_ioctl *drm_cmd = io_uring_sqe_cmd(cmd->sqe);

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