linux-kernel - Re: [PATCH v3 01/20] clk: renesas: rzv2h: Add PLLDSI clk mux support

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Message-ID: <202601311423.gWtJuxiU-lkp@intel.com>
Date: Sat, 31 Jan 2026 14:50:36 +0800
From: kernel test robot <lkp@...el.com>
To: Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	tomm.merciai@...il.com, geert@...ux-m68k.org,
	laurent.pinchart@...asonboard.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
	linux-renesas-soc@...r.kernel.org, biju.das.jz@...renesas.com,
	Tommaso Merciai <tommaso.merciai.xr@...renesas.com>,
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Geert Uytterhoeven <geert+renesas@...der.be>,
	Michael Turquette <mturquette@...libre.com>,
	Stephen Boyd <sboyd@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>,
	Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 01/20] clk: renesas: rzv2h: Add PLLDSI clk mux support

Hi Tommaso,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20260129]
[also build test ERROR on linus/master v6.19-rc7]
[cannot apply to geert-renesas-drivers/renesas-clk drm-misc/drm-misc-next geert-renesas-devel/next v6.19-rc7 v6.19-rc6 v6.19-rc5]
[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/Tommaso-Merciai/clk-renesas-rzv2h-Add-PLLDSI-clk-mux-support/20260131-023642
base:   next-20260129
patch link:    https://lore.kernel.org/r/2cc58beb0c0fd96b07374e1e84e90e860c81fb95.1769797221.git.tommaso.merciai.xr%40bp.renesas.com
patch subject: [PATCH v3 01/20] clk: renesas: rzv2h: Add PLLDSI clk mux support
config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20260131/202601311423.gWtJuxiU-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260131/202601311423.gWtJuxiU-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/202601311423.gWtJuxiU-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/clk/renesas/rzv2h-cpg.c:796:10: error: invalid application of 'typeof' to bit-field
     796 |         width = fls(smux.width) - ffs(smux.width) + 1;
         |                 ^
   arch/riscv/include/asm/bitops.h:154:8: note: expanded from macro 'fls'
     154 |         typeof(x) x_ = (x);                                     \
         |               ^
   1 error generated.


vim +/typeof +796 drivers/clk/renesas/rzv2h-cpg.c

   783	
   784	static struct clk * __init
   785	rzv2h_cpg_plldsi_smux_clk_register(const struct cpg_core_clk *core,
   786					   struct rzv2h_cpg_priv *priv)
   787	{
   788		struct rzv2h_plldsi_mux_clk *clk_hw_data;
   789		struct clk_init_data init;
   790		struct clk_hw *clk_hw;
   791		struct smuxed smux;
   792		u8 width;
   793		int ret;
   794	
   795		smux = core->cfg.smux;
 > 796		width = fls(smux.width) - ffs(smux.width) + 1;
   797	
   798		if (width + smux.width > 16) {
   799			dev_err(priv->dev, "mux value exceeds LOWORD field\n");
   800			return ERR_PTR(-EINVAL);
   801		}
   802	
   803		clk_hw_data = devm_kzalloc(priv->dev, sizeof(*clk_hw_data), GFP_KERNEL);
   804		if (!clk_hw_data)
   805			return ERR_PTR(-ENOMEM);
   806	
   807		clk_hw_data->priv = priv;
   808	
   809		init.name = core->name;
   810		init.ops = &rzv2h_cpg_plldsi_smux_ops;
   811		init.flags = core->flag;
   812		init.parent_names = core->parent_names;
   813		init.num_parents = core->num_parents;
   814	
   815		clk_hw_data->mux.reg = priv->base + smux.offset;
   816	
   817		clk_hw_data->mux.shift = smux.shift;
   818		clk_hw_data->mux.mask = smux.width;
   819		clk_hw_data->mux.flags = core->mux_flags;
   820		clk_hw_data->mux.lock = &priv->rmw_lock;
   821	
   822		clk_hw = &clk_hw_data->mux.hw;
   823		clk_hw->init = &init;
   824	
   825		ret = devm_clk_hw_register(priv->dev, clk_hw);
   826		if (ret)
   827			return ERR_PTR(ret);
   828	
   829		return clk_hw->clk;
   830	}
   831	

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