linux-kernel - Re: [PATCH] riscv: use generic MMIO accessors

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Message-ID: <202505312115.47xDnzAe-lkp@intel.com>
Date: Sat, 31 May 2025 21:55:17 +0800
From: kernel test robot <lkp@...el.com>
To: Qingfang Deng <dqfext@...il.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev
Subject: Re: [PATCH] riscv: use generic MMIO accessors

Hi Qingfang,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.15]
[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/Qingfang-Deng/riscv-use-generic-MMIO-accessors/20250530-112455
base:   linus/master
patch link:    https://lore.kernel.org/r/20250530032252.3092502-1-dqfext%40gmail.com
patch subject: [PATCH] riscv: use generic MMIO accessors
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20250531/202505312115.47xDnzAe-lkp@intel.com/config)
compiler: clang version 21.0.0git (https://github.com/llvm/llvm-project f819f46284f2a79790038e1f6649172789734ae8)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250531/202505312115.47xDnzAe-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/202505312115.47xDnzAe-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/omapdrm/dss/dispc.c:4720:27: warning: stack frame size (2304) exceeds limit (2048) in 'dispc_runtime_suspend' [-Wframe-larger-than]
    4720 | static __maybe_unused int dispc_runtime_suspend(struct device *dev)
         |                           ^
   drivers/gpu/drm/omapdrm/dss/dispc.c:4735:27: warning: stack frame size (2432) exceeds limit (2048) in 'dispc_runtime_resume' [-Wframe-larger-than]
    4735 | static __maybe_unused int dispc_runtime_resume(struct device *dev)
         |                           ^
   2 warnings generated.


vim +/dispc_runtime_suspend +4720 drivers/gpu/drm/omapdrm/dss/dispc.c

060b6d9cbab03f drivers/video/omap2/dss/dispc.c     Senthilvadivu Guruswamy 2011-01-24  4719  
d6c75c295f67b2 drivers/gpu/drm/omapdrm/dss/dispc.c Arnd Bergmann           2021-12-05 @4720  static __maybe_unused int dispc_runtime_suspend(struct device *dev)
4fbafaf371be78 drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2011-05-27  4721  {
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart        2018-02-13  4722  	struct dispc_device *dispc = dev_get_drvdata(dev);
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart        2018-02-13  4723  
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart        2018-02-13  4724  	dispc->is_enabled = false;
0925afc9a4851c drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2014-04-11  4725  	/* ensure the dispc_irq_handler sees the is_enabled value */
0925afc9a4851c drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2014-04-11  4726  	smp_wmb();
0925afc9a4851c drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2014-04-11  4727  	/* wait for current handler to finish before turning the DISPC off */
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart        2018-02-13  4728  	synchronize_irq(dispc->irq);
0925afc9a4851c drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2014-04-11  4729  
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart        2018-02-13  4730  	dispc_save_context(dispc);
4fbafaf371be78 drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2011-05-27  4731  
4fbafaf371be78 drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2011-05-27  4732  	return 0;
4fbafaf371be78 drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2011-05-27  4733  }
4fbafaf371be78 drivers/video/omap2/dss/dispc.c     Tomi Valkeinen          2011-05-27  4734  

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