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Date: Sat, 29 Oct 2022 17:12:12 +0800
From: kernel test robot <lkp@...el.com>
To: Peilin Ye <yepeilin.cs@...il.com>,
Alexander Viro <viro@...iv.linux.org.uk>
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
Peilin Ye <peilin.ye@...edance.com>,
Cong Wang <cong.wang@...edance.com>,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] coredump: Use vmsplice_to_pipe() for pipes in
dump_emit_page()
Hi Peilin,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.1-rc2 next-20221028]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Peilin-Ye/coredump-Use-vmsplice_to_pipe-for-pipes-in-dump_emit_page/20221029-085307
patch link: https://lore.kernel.org/r/20221029005147.2553-1-yepeilin.cs%40gmail.com
patch subject: [PATCH v1] coredump: Use vmsplice_to_pipe() for pipes in dump_emit_page()
config: hexagon-randconfig-r041-20221029
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/intel-lab-lkp/linux/commit/49da2daf3c9dc6a687c0f64c047bec6199f232af
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Peilin-Ye/coredump-Use-vmsplice_to_pipe-for-pipes-in-dump_emit_page/20221029-085307
git checkout 49da2daf3c9dc6a687c0f64c047bec6199f232af
# 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 net/tls/
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 net/tls/tls_sw.c:41:
>> include/linux/splice.h:84:56: warning: declaration of 'struct iov_iter' will not be visible outside of this function [-Wvisibility]
extern long vmsplice_to_pipe(struct file *file, struct iov_iter *iter,
^
In file included from net/tls/tls_sw.c:44:
In file included from include/net/strparser.h:11:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
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 net/tls/tls_sw.c:44:
In file included from include/net/strparser.h:11:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
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 net/tls/tls_sw.c:44:
In file included from include/net/strparser.h:11:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
In file included from include/linux/highmem.h:12:
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);
~~~~~~~~~~ ^
7 warnings generated.
vim +84 include/linux/splice.h
64
65 typedef int (splice_actor)(struct pipe_inode_info *, struct pipe_buffer *,
66 struct splice_desc *);
67 typedef int (splice_direct_actor)(struct pipe_inode_info *,
68 struct splice_desc *);
69
70 extern ssize_t splice_from_pipe(struct pipe_inode_info *, struct file *,
71 loff_t *, size_t, unsigned int,
72 splice_actor *);
73 extern ssize_t __splice_from_pipe(struct pipe_inode_info *,
74 struct splice_desc *, splice_actor *);
75 extern ssize_t splice_to_pipe(struct pipe_inode_info *,
76 struct splice_pipe_desc *);
77 extern ssize_t add_to_pipe(struct pipe_inode_info *,
78 struct pipe_buffer *);
79 extern ssize_t splice_direct_to_actor(struct file *, struct splice_desc *,
80 splice_direct_actor *);
81 extern long do_splice(struct file *in, loff_t *off_in,
82 struct file *out, loff_t *off_out,
83 size_t len, unsigned int flags);
> 84 extern long vmsplice_to_pipe(struct file *file, struct iov_iter *iter,
85 unsigned int flags);
86
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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