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Message-ID: <202212151354.FoySN8DS-lkp@intel.com>
Date: Thu, 15 Dec 2022 14:01:37 +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/runl.c:34:1: warning: no
previous prototype for function 'nvkm_engn_cgrp_get'
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: 4d60100a23ec5b98e43277d82e5de53c359cf02c drm/nouveau/fifo: add common channel recovery
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=4d60100a23ec5b98e43277d82e5de53c359cf02c
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout 4d60100a23ec5b98e43277d82e5de53c359cf02c
# 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/runl.c:22:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.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/runl.c:22:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.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/runl.c:22:
In file included from drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.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/runl.c:34:1: warning: no previous prototype for function 'nvkm_engn_cgrp_get' [-Wmissing-prototypes]
nvkm_engn_cgrp_get(struct nvkm_engn *engn, unsigned long *pirqflags)
^
drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c:33:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct nvkm_cgrp *
^
static
13 warnings generated.
vim +/nvkm_engn_cgrp_get +34 drivers/gpu/drm/nouveau/nvkm/engine/fifo/runl.c
32
33 struct nvkm_cgrp *
> 34 nvkm_engn_cgrp_get(struct nvkm_engn *engn, unsigned long *pirqflags)
35 {
36 struct nvkm_cgrp *cgrp = NULL;
37 struct nvkm_chan *chan;
38 bool cgid;
39 int id;
40
41 id = engn->func->cxid(engn, &cgid);
42 if (id < 0)
43 return NULL;
44
45 if (!cgid) {
46 chan = nvkm_runl_chan_get_chid(engn->runl, id, pirqflags);
47 if (chan)
48 cgrp = chan->cgrp;
49 } else {
50 cgrp = nvkm_runl_cgrp_get_cgid(engn->runl, id, pirqflags);
51 }
52
53 WARN_ON(!cgrp);
54 return cgrp;
55 }
56
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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