Quoting kernel test robot (2020-06-21 02:05:20) > 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 <l...@intel.com> > > > 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: sparse: incorrect type in > >> argument 1 (different base types) @@ expected unsigned int [usertype] > >> @@ got restricted __be32 [usertype] @@ > >> drivers/clk/clk-divider.c:39:17: sparse: expected unsigned int > >> [usertype] > drivers/clk/clk-divider.c:39:17: 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);
Ok. I guess we'll need to force cast the pointer to be __be32 in this case. Before it wasn't in generic code so the architecture was masking the issue.
