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Message-ID: <202409180339.6n97u08v-lkp@intel.com>
Date: Wed, 18 Sep 2024 03:08:20 +0800
From: kernel test robot <lkp@...el.com>
To: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Subject: drivers/gpu/drm/omapdrm/dss/dispc.c:4881:27: warning: stack frame
size (2056) exceeds limit (2048) in 'dispc_runtime_resume'
Hi Ville,
First bad commit (maybe != root cause):
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 2f27fce67173bbb05d5a0ee03dae5c021202c912
commit: dc6fcaaba5a5411237d042a26c4d46689f3346bb drm/omap: Allow build with COMPILE_TEST=y
date: 4 months ago
config: um-allmodconfig (https://download.01.org/0day-ci/archive/20240918/202409180339.6n97u08v-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project bf684034844c660b778f0eba103582f582b710c9)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240918/202409180339.6n97u08v-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409180339.6n97u08v-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/gpu/drm/omapdrm/dss/dispc.c:13:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:8:
In file included from include/linux/mm.h:2210:
include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
522 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
| ~~~~~~~~~~~ ^ ~~~
In file included from drivers/gpu/drm/omapdrm/dss/dispc.c:13:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
| ^
In file included from drivers/gpu/drm/omapdrm/dss/dispc.c:13:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
| ^
In file included from drivers/gpu/drm/omapdrm/dss/dispc.c:13:
In file included from include/linux/dma-mapping.h:11:
In file included from include/linux/scatterlist.h:9:
In file included from arch/um/include/asm/io.h:24:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
692 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
700 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
708 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
717 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
726 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
735 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> drivers/gpu/drm/omapdrm/dss/dispc.c:4881:27: warning: stack frame size (2056) exceeds limit (2048) in 'dispc_runtime_resume' [-Wframe-larger-than]
4881 | static __maybe_unused int dispc_runtime_resume(struct device *dev)
| ^
14 warnings generated.
vim +/dispc_runtime_resume +4881 drivers/gpu/drm/omapdrm/dss/dispc.c
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4880
d6c75c295f67b2 drivers/gpu/drm/omapdrm/dss/dispc.c Arnd Bergmann 2021-12-05 @4881 static __maybe_unused int dispc_runtime_resume(struct device *dev)
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4882 {
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4883 struct dispc_device *dispc = dev_get_drvdata(dev);
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4884
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4885 /*
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4886 * The reset value for load mode is 0 (OMAP_DSS_LOAD_CLUT_AND_FRAME)
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4887 * but we always initialize it to 2 (OMAP_DSS_LOAD_FRAME_ONLY) in
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4888 * _omap_dispc_initial_config(). We can thus use it to detect if
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4889 * we have lost register context.
9229b5165bf0c4 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-02-14 4890 */
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4891 if (REG_GET(dispc, DISPC_CONFIG, 2, 1) != OMAP_DSS_LOAD_FRAME_ONLY) {
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4892 _omap_dispc_initial_config(dispc);
be07dcd7e239a8 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2013-11-21 4893
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4894 dispc_errata_i734_wa(dispc);
fbff010bd0b449 drivers/gpu/drm/omapdrm/dss/dispc.c Jyri Sarha 2016-06-07 4895
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4896 dispc_restore_context(dispc);
acc3a231d3d145 drivers/gpu/drm/omapdrm/dss/dispc.c Jyri Sarha 2016-06-07 4897
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4898 dispc_restore_gamma_tables(dispc);
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4899 }
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4900
1f6b6b6267ebe6 drivers/gpu/drm/omapdrm/dss/dispc.c Laurent Pinchart 2018-02-13 4901 dispc->is_enabled = true;
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4902 /* ensure the dispc_irq_handler sees the is_enabled value */
0925afc9a4851c drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2014-04-11 4903 smp_wmb();
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4904
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4905 return 0;
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4906 }
4fbafaf371be78 drivers/video/omap2/dss/dispc.c Tomi Valkeinen 2011-05-27 4907
:::::: The code at line 4881 was first introduced by commit
:::::: d6c75c295f67b26fad8ba2e72db80e0f744e9da9 omapdrm: dss: mark runtime PM functions __maybe_unused
:::::: TO: Arnd Bergmann <arnd@...db.de>
:::::: CC: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
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