CC: [email protected]
CC: [email protected]
TO: Daniel Vetter <[email protected]>
CC: Thomas Zimmermann <[email protected]>

Hi Daniel,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
master
head:   729e3d091984487f7aa1ebfabfe594e5b317ed0f
commit: b0548a245dd30bf448e2d4fc88edcb66d4fa668f drm/cirrus: Move to drm/tiny
date:   5 months ago
:::::: branch date: 13 hours ago
:::::: commit date: 5 months ago
config: riscv-randconfig-s032-20200912 (attached as .config)
compiler: riscv64-linux-gcc (GCC) 9.3.0
reproduce:
        wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.2-191-g10164920-dirty
        git checkout b0548a245dd30bf448e2d4fc88edcb66d4fa668f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 
CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>


sparse warnings: (new ones prefixed by >>)

   drivers/gpu/drm/tiny/cirrus.c:307:9: sparse: sparse: cast removes address 
space '<asn:2>' of expression
   drivers/gpu/drm/tiny/cirrus.c:307:9: sparse: sparse: incorrect type in 
argument 2 (different address spaces) @@     expected void volatile [noderef] 
<asn:2> *addr @@     got void * @@
   drivers/gpu/drm/tiny/cirrus.c:307:9: sparse:     expected void volatile 
[noderef] <asn:2> *addr
>> drivers/gpu/drm/tiny/cirrus.c:307:9: sparse:     got void *

# 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b0548a245dd30bf448e2d4fc88edcb66d4fa668f
git remote add linus 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout b0548a245dd30bf448e2d4fc88edcb66d4fa668f
vim +307 drivers/gpu/drm/tiny/cirrus.c

ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  181  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  182  
static int cirrus_mode_set(struct cirrus_device *cirrus,
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  183    
                   struct drm_display_mode *mode,
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  184    
                   struct drm_framebuffer *fb)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  185  {
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  186    
int hsyncstart, hsyncend, htotal, hdispend;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  187    
int vtotal, vdispend;
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  188    
int tmp, idx;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  189    
int sr07 = 0, hdr = 0;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  190  
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  191    
if (!drm_dev_enter(&cirrus->dev, &idx))
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  192    
        return -1;
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  193  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  194    
htotal = mode->htotal / 8;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  195    
hsyncend = mode->hsync_end / 8;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  196    
hsyncstart = mode->hsync_start / 8;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  197    
hdispend = mode->hdisplay / 8;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  198  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  199    
vtotal = mode->vtotal;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  200    
vdispend = mode->vdisplay;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  201  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  202    
vdispend -= 1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  203    
vtotal -= 2;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  204  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  205    
htotal -= 5;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  206    
hdispend -= 1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  207    
hsyncstart += 1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  208    
hsyncend += 1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  209  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  210    
wreg_crt(cirrus, VGA_CRTC_V_SYNC_END, 0x20);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  211    
wreg_crt(cirrus, VGA_CRTC_H_TOTAL, htotal);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  212    
wreg_crt(cirrus, VGA_CRTC_H_DISP, hdispend);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  213    
wreg_crt(cirrus, VGA_CRTC_H_SYNC_START, hsyncstart);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  214    
wreg_crt(cirrus, VGA_CRTC_H_SYNC_END, hsyncend);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  215    
wreg_crt(cirrus, VGA_CRTC_V_TOTAL, vtotal & 0xff);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  216    
wreg_crt(cirrus, VGA_CRTC_V_DISP_END, vdispend & 0xff);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  217  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  218    
tmp = 0x40;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  219    
if ((vdispend + 1) & 512)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  220    
        tmp |= 0x20;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  221    
wreg_crt(cirrus, VGA_CRTC_MAX_SCAN, tmp);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  222  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  223    
/*
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  224    
 * Overflow bits for values that don't fit in the standard registers
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  225    
 */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  226    
tmp = 0x10;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  227    
if (vtotal & 0x100)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  228    
        tmp |= 0x01;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  229    
if (vdispend & 0x100)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  230    
        tmp |= 0x02;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  231    
if ((vdispend + 1) & 0x100)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  232    
        tmp |= 0x08;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  233    
if (vtotal & 0x200)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  234    
        tmp |= 0x20;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  235    
if (vdispend & 0x200)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  236    
        tmp |= 0x40;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  237    
wreg_crt(cirrus, VGA_CRTC_OVERFLOW, tmp);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  238  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  239    
tmp = 0;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  240  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  241    
/* More overflow bits */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  242  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  243    
if ((htotal + 5) & 0x40)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  244    
        tmp |= 0x10;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  245    
if ((htotal + 5) & 0x80)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  246    
        tmp |= 0x20;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  247    
if (vtotal & 0x100)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  248    
        tmp |= 0x40;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  249    
if (vtotal & 0x200)
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  250    
        tmp |= 0x80;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  251  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  252    
wreg_crt(cirrus, CL_CRT1A, tmp);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  253  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  254    
/* Disable Hercules/CGA compatibility */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  255    
wreg_crt(cirrus, VGA_CRTC_MODE, 0x03);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  256  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  257    
sr07 = rreg_seq(cirrus, 0x07);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  258    
sr07 &= 0xe0;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  259    
hdr = 0;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  260  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  261    
cirrus->cpp = cirrus_cpp(fb);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  262    
switch (cirrus->cpp * 8) {
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  263    
case 8:
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  264    
        sr07 |= 0x11;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  265    
        break;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  266    
case 16:
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  267    
        sr07 |= 0x17;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  268    
        hdr = 0xc1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  269    
        break;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  270    
case 24:
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  271    
        sr07 |= 0x15;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  272    
        hdr = 0xc5;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  273    
        break;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  274    
case 32:
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  275    
        sr07 |= 0x19;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  276    
        hdr = 0xc5;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  277    
        break;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  278    
default:
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  279    
        drm_dev_exit(idx);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  280    
        return -1;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  281    
}
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  282  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  283    
wreg_seq(cirrus, 0x7, sr07);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  284  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  285    
/* Program the pitch */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  286    
cirrus->pitch = cirrus_pitch(fb);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  287    
tmp = cirrus->pitch / 8;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  288    
wreg_crt(cirrus, VGA_CRTC_OFFSET, tmp);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  289  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  290    
/* Enable extended blanking and pitch bits, and enable full memory */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  291    
tmp = 0x22;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  292    
tmp |= (cirrus->pitch >> 7) & 0x10;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  293    
tmp |= (cirrus->pitch >> 6) & 0x40;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  294    
wreg_crt(cirrus, 0x1b, tmp);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  295  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  296    
/* Enable high-colour modes */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  297    
wreg_gfx(cirrus, VGA_GFX_MODE, 0x40);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  298  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  299    
/* And set graphics mode */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  300    
wreg_gfx(cirrus, VGA_GFX_MISC, 0x01);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  301  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  302    
wreg_hdr(cirrus, hdr);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  303  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  304    
cirrus_set_start_address(cirrus, 0);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  305  
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  306    
/* Unblank (needed on S3 resume, vgabios doesn't do it then) */
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05 @307    
outb(0x20, 0x3c0);
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  308  
81e7301d7da3b7 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2020-02-11  309    
drm_dev_exit(idx);
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  310    
return 0;
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  311  }
ab3e023b1b4c98 drivers/gpu/drm/cirrus/cirrus.c Gerd Hoffmann 2019-04-05  312  

:::::: The code at line 307 was first introduced by commit
:::::: ab3e023b1b4c9887c9f0f761b47f3f0516bd3434 drm/cirrus: rewrite and 
modernize driver.

:::::: TO: Gerd Hoffmann <[email protected]>
:::::: CC: Gerd Hoffmann <[email protected]>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

Attachment: .config.gz
Description: application/gzip

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