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Message-ID: <202210221142.NIQoE0TT-lkp@intel.com>
Date: Sat, 22 Oct 2022 11:46:19 +0800
From: kernel test robot <lkp@...el.com>
To: Dan Williams <dan.j.williams@...el.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
Ammar Faizi <ammarfaizi2@...weeb.org>,
GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>
Subject: [ammarfaizi2-block:akpm/mm/mm-unstable 146/162]
include/linux/memremap.h:258:9: warning: expression which evaluates to zero
treated as a null pointer constant of type 'struct folio *'
tree: https://github.com/ammarfaizi2/linux-block akpm/mm/mm-unstable
head: fc93ddbd10610f8f621fba75c1a0f110f543a7bd
commit: e634e7e18f3bf0b30b8f9f16434929d950b7ac33 [146/162] mm/memremap: Introduce pgmap_request_folio() using pgmap offsets
config: hexagon-randconfig-r041-20221022
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/ammarfaizi2/linux-block/commit/e634e7e18f3bf0b30b8f9f16434929d950b7ac33
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block akpm/mm/mm-unstable
git checkout e634e7e18f3bf0b30b8f9f16434929d950b7ac33
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/gpu/drm/bridge/synopsys/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:13:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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]
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'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:13:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:13:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:13:
In file included from include/linux/cgroup.h:26:
In file included from include/linux/kernel_stat.h:9:
In file included from include/linux/interrupt.h:11:
In file included from include/linux/hardirq.h:11:
In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
In file included from include/asm-generic/hardirq.h:17:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__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]
__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]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi.c:13:
In file included from include/linux/i2c.h:19:
In file included from include/linux/regulator/consumer.h:35:
In file included from include/linux/suspend.h:5:
In file included from include/linux/swap.h:9:
In file included from include/linux/memcontrol.h:20:
In file included from include/linux/mm.h:31:
>> include/linux/memremap.h:258:9: warning: expression which evaluates to zero treated as a null pointer constant of type 'struct folio *' [-Wnon-literal-null-conversion]
return false;
^~~~~
7 warnings generated.
--
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:8:
In file included from include/linux/mm.h:31:
>> include/linux/memremap.h:258:9: warning: expression which evaluates to zero treated as a null pointer constant of type 'struct folio *' [-Wnon-literal-null-conversion]
return false;
^~~~~
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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]
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'
#define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
^
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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'
#define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
^
In file included from drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c:9:
In file included from include/linux/dma-mapping.h:10:
In file included from include/linux/scatterlist.h:9:
In file included from arch/hexagon/include/asm/io.h:334:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
__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]
__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]
__raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
~~~~~~~~~~ ^
drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c:30:18: warning: unused function 'hdmi_read' [-Wunused-function]
static inline u8 hdmi_read(struct dw_hdmi_i2s_audio_data *audio, int offset)
^
8 warnings generated.
vim +258 include/linux/memremap.h
8e37d00a850160b Christoph Hellwig 2017-12-29 254
e634e7e18f3bf0b Dan Williams 2022-10-20 255 static inline struct folio *pgmap_request_folio(struct dev_pagemap *pgmap,
e634e7e18f3bf0b Dan Williams 2022-10-20 256 pgoff_t pgmap_offset, int order)
e8ca415e7cc5d6c Dan Williams 2022-10-14 257 {
e8ca415e7cc5d6c Dan Williams 2022-10-14 @258 return false;
e8ca415e7cc5d6c Dan Williams 2022-10-14 259 }
e8ca415e7cc5d6c Dan Williams 2022-10-14 260
:::::: The code at line 258 was first introduced by commit
:::::: e8ca415e7cc5d6c4d431b3dda58877ff24b021ee fsdax: introduce pgmap_request_folios()
:::::: TO: Dan Williams <dan.j.williams@...el.com>
:::::: CC: Andrew Morton <akpm@...ux-foundation.org>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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