* [dhowells-fs:cifs-netfs 7/40] fs/netfs/direct_write.c:165:44: warning: variable 'end' is uninitialized when used here
@ 2024-04-17 17:26 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2024-04-17 17:26 UTC (permalink / raw)
To: David Howells; +Cc: llvm, oe-kbuild-all
tree: https://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git cifs-netfs
head: 8dc73cdbbce16b41d4de537600385262aa8b7613
commit: 3a3871ab79037b2330014b3cbe16676c74e10c00 [7/40] mm: Provide a means of invalidation without using launder_folio
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240418/202404180108.grnZRvXY-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7089c359a3845323f6f30c44a47dd901f2edfe63)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240418/202404180108.grnZRvXY-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404180108.grnZRvXY-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from fs/netfs/direct_write.c:10:
In file included from fs/netfs/internal.h:10:
In file included from include/linux/netfs.h:19:
In file included from include/linux/pagemap.h:8:
In file included from include/linux/mm.h:2208:
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 fs/netfs/direct_write.c:10:
In file included from fs/netfs/internal.h:10:
In file included from include/linux/netfs.h:19:
In file included from include/linux/pagemap.h:11:
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:328:
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 fs/netfs/direct_write.c:10:
In file included from fs/netfs/internal.h:10:
In file included from include/linux/netfs.h:19:
In file included from include/linux/pagemap.h:11:
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:328:
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 fs/netfs/direct_write.c:10:
In file included from fs/netfs/internal.h:10:
In file included from include/linux/netfs.h:19:
In file included from include/linux/pagemap.h:11:
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:328:
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);
| ~~~~~~~~~~ ^
>> fs/netfs/direct_write.c:165:44: warning: variable 'end' is uninitialized when used here [-Wuninitialized]
165 | if (filemap_range_has_page(mapping, pos, end))
| ^~~
fs/netfs/direct_write.c:138:24: note: initialize the variable 'end' to silence this warning
138 | unsigned long long end;
| ^
| = 0
8 warnings generated.
vim +/end +165 fs/netfs/direct_write.c
118
119 /**
120 * netfs_unbuffered_write_iter - Unbuffered write to a file
121 * @iocb: IO state structure
122 * @from: iov_iter with data to write
123 *
124 * Do an unbuffered write to a file, writing the data directly to the server
125 * and not lodging the data in the pagecache.
126 *
127 * Return:
128 * * Negative error code if no data has been written at all of
129 * vfs_fsync_range() failed for a synchronous write
130 * * Number of bytes written, even for truncated writes
131 */
132 ssize_t netfs_unbuffered_write_iter(struct kiocb *iocb, struct iov_iter *from)
133 {
134 struct file *file = iocb->ki_filp;
135 struct address_space *mapping = file->f_mapping;
136 struct inode *inode = mapping->host;
137 struct netfs_inode *ictx = netfs_inode(inode);
138 unsigned long long end;
139 ssize_t ret;
140 loff_t pos = iocb->ki_pos;
141
142 _enter("%llx,%zx,%llx", pos, iov_iter_count(from), i_size_read(inode));
143
144 if (!iov_iter_count(from))
145 return 0;
146
147 trace_netfs_write_iter(iocb, from);
148 netfs_stat(&netfs_n_rh_dio_write);
149
150 ret = netfs_start_io_direct(inode);
151 if (ret < 0)
152 return ret;
153 ret = generic_write_checks(iocb, from);
154 if (ret <= 0)
155 goto out;
156 ret = file_remove_privs(file);
157 if (ret < 0)
158 goto out;
159 ret = file_update_time(file);
160 if (ret < 0)
161 goto out;
162 if (iocb->ki_flags & IOCB_NOWAIT) {
163 /* We could block if there are any pages in the range. */
164 ret = -EAGAIN;
> 165 if (filemap_range_has_page(mapping, pos, end))
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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