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Date: Thu, 15 Dec 2022 09:08:33 +0800
From: kernel test robot <lkp@...el.com>
To: Ben Skeggs <bskeggs@...hat.com>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-kernel@...r.kernel.org, Lyude Paul <lyude@...hat.com>
Subject: drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c:178:1: warning: no
previous prototype for function 'gf100_fifo_nonstall_block'
Hi Ben,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 041fae9c105ae342a4245cf1e0dc56a23fbb9d3c
commit: d67f3b96462922713e77cddb9d6f4965606918fc drm/nouveau/fifo: tidy up non-stall intr handling
date: 5 weeks ago
config: s390-randconfig-r044-20221215
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58)
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
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d67f3b96462922713e77cddb9d6f4965606918fc
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout d67f3b96462922713e77cddb9d6f4965606918fc
# 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=s390 SHELL=/bin/bash drivers/gpu/drm/
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/nouveau/nvkm/engine/fifo/gf100.c:24:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/engine.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/device.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/oclass.h:3:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/os.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvif/os.h:8:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
#define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
#define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
^
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c:24:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/engine.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/device.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/oclass.h:3:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/os.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvif/os.h:8:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
#define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
#define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
^
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c:24:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/chan.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/engine/fifo.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/engine.h:5:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/subdev.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/device.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/oclass.h:3:
In file included from drivers/gpu/drm/nouveau/include/nvkm/core/os.h:4:
In file included from drivers/gpu/drm/nouveau/include/nvif/os.h:8:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:75:
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);
~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
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]
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]
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]
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]
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]
writesl(PCI_IOBASE + addr, buffer, count);
~~~~~~~~~~ ^
>> drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c:178:1: warning: no previous prototype for function 'gf100_fifo_nonstall_block' [-Wmissing-prototypes]
gf100_fifo_nonstall_block(struct nvkm_event *event, int type, int index)
^
drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c:177:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void
^
static
13 warnings generated.
vim +/gf100_fifo_nonstall_block +178 drivers/gpu/drm/nouveau/nvkm/engine/fifo/gf100.c
176
177 void
> 178 gf100_fifo_nonstall_block(struct nvkm_event *event, int type, int index)
179 {
180 struct nvkm_fifo *fifo = container_of(event, typeof(*fifo), nonstall.event);
181 unsigned long flags;
182
183 spin_lock_irqsave(&fifo->lock, flags);
184 nvkm_mask(fifo->engine.subdev.device, 0x002140, 0x80000000, 0x00000000);
185 spin_unlock_irqrestore(&fifo->lock, flags);
186 }
187
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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