Re: [linux-next:master 6172/9662] drivers/video/fbdev/atmel_lcdfb.c:362:20: sparse: sparse: incorrec

On Mon, May 18, 2020 at 8:56 AM kbuild test robot [off-list ref] wrote:

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   bdecf38f228bcca73b31ada98b5b7ba1215eb9c9
commit: bbd7ffdbef6888459f301c5889f3b14ada38b913 [6172/9662] clk: Allow the common clk framework to be selectable
config: ia64-randconfig-s001-20200518 (attached as .config)
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-193-gb8fad4bc-dirty
        git checkout bbd7ffdbef6888459f301c5889f3b14ada38b913
        # save the attached .config to linux build tree
        make C=1 ARCH=ia64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <redacted>


sparse warnings: (new ones prefixed by >>)

   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse: sparse: incorrect type in assignment (different address spaces) @@    expected char [noderef] <asn:2> *screen_base @@    got n:2> *screen_base @@
   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse:    expected char [noderef] <asn:2> *screen_base
   drivers/video/fbdev/atmel_lcdfb.c:354:27: sparse:    got void *

quoted

quoted

drivers/video/fbdev/atmel_lcdfb.c:362:20: sparse: sparse: incorrect type in argument 1 (different address spaces) @@    expected void * @@    got char [noderef] <asvoid * @@
drivers/video/fbdev/atmel_lcdfb.c:362:20: sparse:    expected void *

   drivers/video/fbdev/atmel_lcdfb.c:362:20: sparse:    got char [noderef] <asn:2> *screen_base
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse: sparse: incorrect type in argument 3 (different address spaces) @@    expected void *cpu_addr @@    got char [noderef] <asvoid *cpu_addr @@
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:    expected void *cpu_addr
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:    got char [noderef] <asn:2> *screen_base
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse: sparse: incorrect type in argument 3 (different address spaces) @@    expected void *cpu_addr @@    got char [noderef] <asvoid *cpu_addr @@
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:    expected void *cpu_addr
   drivers/video/fbdev/atmel_lcdfb.c:333:59: sparse:    got char [noderef] <asn:2> *screen_base

This is an old bug, valid but harmless. The same thing happens in a number
of fbdev drivers, but it may be hard to motivate someone to fix them all.

       Arnd