drivers/video/fbdev/mx3fb.c:1336:26: sparse: sparse: incorrect type in assignment (different address spaces)

From: kernel test robot
Date: Wed Aug 19 2020 - 09:55:40 EST

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tree: config: arm64-randconfig-s031-20200819 compiler: aarch64-linux-gcc reproduce:
wget # apt-get install sparse
# sparse version: v0.6.2-183 git checkout 670d0a4b1070466 # save the attached COMPILER_INSTALL_PATH=$HOME/0day
If you fix the issue, kindly Reported-by: kernel test robot

sparse warnings: (new ones
>> drivers/video/fbdev/mx3fb.c:1336:26: >> drivers/video/fbdev/mx3fb.c:1336:26: drivers/video/fbdev/mx3fb.c:1336:26: sparse: >> drivers/video/fbdev/mx3fb.c:1359:17: >> drivers/video/fbdev/mx3fb.c:1377:56: drivers/video/fbdev/mx3fb.c:1377:56: sparse: >> drivers/video/fbdev/mx3fb.c:1377:56: drivers/video/fbdev/mx3fb.c:1094:25:
# git checkout 670d0a4b10704667765f7d1 vim +1336 drivers/video/fbdev/mx3fb.
86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 20de03dae54e10 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 20de03dae54e10 drivers/video/mx3fb.c 20de03dae54e10 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c f6e45661f9be54 drivers/video/fbdev/mx3fb.c f6e45661f9be54 drivers/video/fbdev/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 20de03dae54e10 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 20de03dae54e10 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c f6e45661f9be54 drivers/video/fbdev/mx3fb.c f6e45661f9be54 drivers/video/fbdev/mx3fb.c 86528da229a448 drivers/video/mx3fb.c f3d8496e9c8418 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 537a1bf059fa31 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c 86528da229a448 drivers/video/mx3fb.c
:::::: The code at line 1336 :::::: f6e45661f9be546811b62b2b01f32f4bf0c436c0
:::::: TO: Luis R. Rodriguez :::::: CC: Ingo Molnar <mingo@xxx
---
0-DAY CI Kernel Test Service, Description: application/gzip Joel Fernandes: "Re: 回复: [PATCH] rcu: shrink each possible cpu krcp" Christoph Hellwig: "Re: [PATCH 05/28] media/v4l2: remove V4L2-FLAG-MEMORY-NON-CONSISTENT" by: [ date ] [ thread ] [ subject ] [ author ] href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
a6f12418ad17
sparse: use identifiers to define address spaces
(attached as .config)
(GCC) 9.3.0
href="https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross">https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
-gaa6ede3b-dirty
7765f7d18f7592993d02783aa
.config to linux build tree
COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm64
add following tag as appropriate
<lkp@xxxxxxxxx>
prefixed by >>)
sparse: sparse: incorrect type in assignment (different address spaces) @@ expected char [noderef] __iomem *screen_base @@ got void * @@
sparse: expected char [noderef] __iomem *screen_base
got void *
sparse: sparse: cast removes address space '__iomem' of expression
sparse: sparse: incorrect type in argument 3 (different address spaces) @@ expected void *cpu_addr @@ got char [noderef] __iomem *screen_base @@
expected void *cpu_addr
sparse: got char [noderef] __iomem *screen_base
sparse: sparse: cast removes address space '__iomem' of expression
it.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=670d0a4b10704667765f7d18f7592993d02783aa">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=670d0a4b10704667765f7d18f7592993d02783aa
href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
8f7592993d02783aa
c
Guennadi Liakhovetski 2009-01-21 1313
Guennadi Liakhovetski 2009-01-21 1314 /*
Guennadi Liakhovetski 2009-01-21 1315 * Main framebuffer functions
Guennadi Liakhovetski 2009-01-21 1316 */
Guennadi Liakhovetski 2009-01-21 1317
Guennadi Liakhovetski 2009-01-21 1318 /**
Guennadi Liakhovetski 2009-01-21 1319 * mx3fb_map_video_memory() - allocates the DRAM memory for the frame buffer.
Guennadi Liakhovetski 2009-01-21 1320 * @fbi: framebuffer information pointer
Krzysztof Helt 2009-06-30 1321 * @mem_len: length of mapped memory
Guennadi Liakhovetski 2009-08-06 1322 * @lock: do not lock during initialisation
Guennadi Liakhovetski 2009-01-21 1323 * @return: Error code indicating success or failure
Guennadi Liakhovetski 2009-01-21 1324 *
Guennadi Liakhovetski 2009-01-21 1325 * This buffer is remapped into a non-cached, non-buffered, memory region to
Guennadi Liakhovetski 2009-01-21 1326 * allow palette and pixel writes to occur without flushing the cache. Once this
Guennadi Liakhovetski 2009-01-21 1327 * area is remapped, all virtual memory access to the video memory should occur
Guennadi Liakhovetski 2009-01-21 1328 * at the new region.
Guennadi Liakhovetski 2009-01-21 1329 */
Guennadi Liakhovetski 2009-08-06 1330 static int mx3fb_map_video_memory(struct fb_info *fbi, unsigned int mem_len,
Guennadi Liakhovetski 2009-08-06 1331 bool lock)
Guennadi Liakhovetski 2009-01-21 1332 {
Guennadi Liakhovetski 2009-01-21 1333 int retval = 0;
Guennadi Liakhovetski 2009-01-21 1334 dma_addr_t addr;
Guennadi Liakhovetski 2009-01-21 1335
Luis R. Rodriguez 2016-01-22 @1336 fbi->screen_base = dma_alloc_wc(fbi->device, mem_len, &addr,
Luis R. Rodriguez 2016-01-22 1337 GFP_DMA | GFP_KERNEL);
Guennadi Liakhovetski 2009-01-21 1338
Guennadi Liakhovetski 2009-01-21 1339 if (!fbi->screen_base) {
Guennadi Liakhovetski 2009-01-21 1340 dev_err(fbi->device, "Cannot allocate %u bytes framebuffer memory\n",
Krzysztof Helt 2009-06-30 1341 mem_len);
Guennadi Liakhovetski 2009-01-21 1342 retval = -EBUSY;
Guennadi Liakhovetski 2009-01-21 1343 goto err0;
Guennadi Liakhovetski 2009-01-21 1344 }
Guennadi Liakhovetski 2009-01-21 1345
Guennadi Liakhovetski 2009-08-06 1346 if (lock)
Krzysztof Helt 2009-06-30 1347 mutex_lock(&fbi->mm_lock);
Guennadi Liakhovetski 2009-01-21 1348 fbi->fix.smem_start = addr;
Krzysztof Helt 2009-06-30 1349 fbi->fix.smem_len = mem_len;
Guennadi Liakhovetski 2009-08-06 1350 if (lock)
Krzysztof Helt 2009-06-30 1351 mutex_unlock(&fbi->mm_lock);
Guennadi Liakhovetski 2009-01-21 1352
Guennadi Liakhovetski 2009-01-21 1353 dev_dbg(fbi->device, "allocated fb @ p=0x%08x, v=0x%p, size=%d.\n",
Guennadi Liakhovetski 2009-01-21 1354 (uint32_t) fbi->fix.smem_start, fbi->screen_base, fbi->fix.smem_len);
Guennadi Liakhovetski 2009-01-21 1355
Guennadi Liakhovetski 2009-01-21 1356 fbi->screen_size = fbi->fix.smem_len;
Guennadi Liakhovetski 2009-01-21 1357
Guennadi Liakhovetski 2009-01-21 1358 /* Clear the screen */
Guennadi Liakhovetski 2009-01-21 @1359 memset((char *)fbi->screen_base, 0, fbi->fix.smem_len);
Guennadi Liakhovetski 2009-01-21 1360
Guennadi Liakhovetski 2009-01-21 1361 return 0;
Guennadi Liakhovetski 2009-01-21 1362
Guennadi Liakhovetski 2009-01-21 1363 err0:
Guennadi Liakhovetski 2009-01-21 1364 fbi->fix.smem_len = 0;
Guennadi Liakhovetski 2009-01-21 1365 fbi->fix.smem_start = 0;
Guennadi Liakhovetski 2009-01-21 1366 fbi->screen_base = NULL;
Guennadi Liakhovetski 2009-01-21 1367 return retval;
Guennadi Liakhovetski 2009-01-21 1368 }
Guennadi Liakhovetski 2009-01-21 1369
Guennadi Liakhovetski 2009-01-21 1370 /**
Guennadi Liakhovetski 2009-01-21 1371 * mx3fb_unmap_video_memory() - de-allocate frame buffer memory.
Guennadi Liakhovetski 2009-01-21 1372 * @fbi: framebuffer information pointer
Guennadi Liakhovetski 2009-01-21 1373 * @return: error code indicating success or failure
Guennadi Liakhovetski 2009-01-21 1374 */
Guennadi Liakhovetski 2009-01-21 1375 static int mx3fb_unmap_video_memory(struct fb_info *fbi)
Guennadi Liakhovetski 2009-01-21 1376 {
Luis R. Rodriguez 2016-01-22 @1377 dma_free_wc(fbi->device, fbi->fix.smem_len, fbi->screen_base,
Luis R. Rodriguez 2016-01-22 1378 fbi->fix.smem_start);
Guennadi Liakhovetski 2009-01-21 1379
Fabio Estevam 2013-02-21 1380 fbi->screen_base = NULL;
Krzysztof Helt 2009-06-30 1381 mutex_lock(&fbi->mm_lock);
Guennadi Liakhovetski 2009-01-21 1382 fbi->fix.smem_start = 0;
Guennadi Liakhovetski 2009-01-21 1383 fbi->fix.smem_len = 0;
Krzysztof Helt 2009-06-30 1384 mutex_unlock(&fbi->mm_lock);
Guennadi Liakhovetski 2009-01-21 1385 return 0;
Guennadi Liakhovetski 2009-01-21 1386 }
Guennadi Liakhovetski 2009-01-21 1387
was first introduced by commit
dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()
<mcgrof@xxxxxxxx>
xxxxxxx>
Intel Corporation
ts.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx">https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
>.config.gz

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