Hi Stephen, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 64677779e8962c20b580b471790fe42367750599 commit: bbd7ffdbef6888459f301c5889f3b14ada38b913 clk: Allow the common clk framework to be selectable date: 7 weeks ago config: alpha-randconfig-s032-20200621 (attached as .config) compiler: alpha-linux-gcc (GCC) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc2-13-gc59158c8-dirty git checkout bbd7ffdbef6888459f301c5889f3b14ada38b913 # save the attached .config to linux build tree make W=1 C=1 ARCH=alpha CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:31:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-divider.c:39:17: sparse: got restricted __be32 [usertype] -- drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:37:17: sparse: got restricted __be32 [usertype] drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-gate.c:29:24: sparse: sparse: cast to restricted __be32 -- drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:18:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-multiplier.c:26:17: sparse: got restricted __be32 [usertype] -- drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:29:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-mux.c:37:17: sparse: got restricted __be32 [usertype] -- drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:20:24: sparse: sparse: cast to restricted __be32 drivers/clk/clk-fractional-divider.c:28:17: sparse: got restricted __be32 [usertype] vim +39 drivers/clk/clk-divider.c 9d9f78ed9af0e4 Mike Turquette 2012-03-15 17 9d9f78ed9af0e4 Mike Turquette 2012-03-15 18 /* 9d9f78ed9af0e4 Mike Turquette 2012-03-15 19 * DOC: basic adjustable divider clock that cannot gate 9d9f78ed9af0e4 Mike Turquette 2012-03-15 20 * 9d9f78ed9af0e4 Mike Turquette 2012-03-15 21 * Traits of this clock: 9d9f78ed9af0e4 Mike Turquette 2012-03-15 22 * prepare - clk_prepare only ensures that parents are prepared 9d9f78ed9af0e4 Mike Turquette 2012-03-15 23 * enable - clk_enable only ensures that parents are enabled 9556f9dad8f576 Brian Norris 2015-04-13 24 * rate - rate is adjustable. clk->rate = ceiling(parent->rate / divisor) 9d9f78ed9af0e4 Mike Turquette 2012-03-15 25 * parent - fixed parent. No clk_set_parent support 9d9f78ed9af0e4 Mike Turquette 2012-03-15 26 */ 9d9f78ed9af0e4 Mike Turquette 2012-03-15 27 434d69fad63b44 Jonas Gorski 2019-04-18 28 static inline u32 clk_div_readl(struct clk_divider *divider) 434d69fad63b44 Jonas Gorski 2019-04-18 29 { 434d69fad63b44 Jonas Gorski 2019-04-18 30 if (divider->flags & CLK_DIVIDER_BIG_ENDIAN) 434d69fad63b44 Jonas Gorski 2019-04-18 @31 return ioread32be(divider->reg); 434d69fad63b44 Jonas Gorski 2019-04-18 32 5834fd75e62366 Jonas Gorski 2019-04-18 33 return readl(divider->reg); 434d69fad63b44 Jonas Gorski 2019-04-18 34 } 434d69fad63b44 Jonas Gorski 2019-04-18 35 434d69fad63b44 Jonas Gorski 2019-04-18 36 static inline void clk_div_writel(struct clk_divider *divider, u32 val) 434d69fad63b44 Jonas Gorski 2019-04-18 37 { 434d69fad63b44 Jonas Gorski 2019-04-18 38 if (divider->flags & CLK_DIVIDER_BIG_ENDIAN) 434d69fad63b44 Jonas Gorski 2019-04-18 @39 iowrite32be(val, divider->reg); 434d69fad63b44 Jonas Gorski 2019-04-18 40 else 5834fd75e62366 Jonas Gorski 2019-04-18 41 writel(val, divider->reg); 434d69fad63b44 Jonas Gorski 2019-04-18 42 } 434d69fad63b44 Jonas Gorski 2019-04-18 43 :::::: The code at line 39 was first introduced by commit :::::: 434d69fad63b443d7afc8aa99264359c9b4e2d3a clk: divider: add explicit big endian support :::::: TO: Jonas Gorski <jonas.gorski(a)gmail.com&gt; :::::: CC: Stephen Boyd <sboyd(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org