From: kernel test robot <lkp@intel.com>
To: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
Hannes Reinecke <hare@suse.de>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
"Matthew Wilcox (Oracle)" <willy@infradead.org>,
linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org,
Andrew Morton <akpm@linux-foundation.org>,
Linux Memory Management List <linux-mm@kvack.org>,
Christoph Hellwig <hch@lst.de>,
Luis Chamberlain <mcgrof@kernel.org>
Subject: Re: [PATCH 1/2] highmem: Add memcpy_to_folio()
Date: Thu, 15 Jun 2023 02:38:08 +0800 [thread overview]
Message-ID: <202306150241.f2mNsWXE-lkp@intel.com> (raw)
In-Reply-To: <20230614134853.1521439-1-willy@infradead.org>
Hi Matthew,
kernel test robot noticed the following build warnings:
[auto build test WARNING on akpm-mm/mm-everything]
[also build test WARNING on linus/master v6.4-rc6]
[cannot apply to next-20230614]
[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/Matthew-Wilcox-Oracle/highmem-Add-memcpy_from_folio/20230614-215150
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230614134853.1521439-1-willy%40infradead.org
patch subject: [PATCH 1/2] highmem: Add memcpy_to_folio()
config: hexagon-randconfig-r015-20230614 (https://download.01.org/0day-ci/archive/20230615/202306150241.f2mNsWXE-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch akpm-mm mm-everything
git checkout akpm-mm/mm-everything
b4 shazam https://lore.kernel.org/r/20230614134853.1521439-1-willy@infradead.org
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/nvme/target/
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/202306150241.f2mNsWXE-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from drivers/nvme/target/fc.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
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]
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 drivers/nvme/target/fc.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
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]
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 drivers/nvme/target/fc.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
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]
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);
| ~~~~~~~~~~ ^
In file included from drivers/nvme/target/fc.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
>> include/linux/highmem.h:525:7: warning: comparison of distinct pointer types ('typeof (len) *' (aka 'unsigned int *') and 'typeof ((1UL << 12) - ((unsigned long)(offset) & ~(~((1 << 12) - 1)))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
525 | n = min(len, PAGE_SIZE - offset_in_page(offset));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
67 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
36 | __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
26 | (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
20 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
In file included from drivers/nvme/target/fc.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
>> include/linux/highmem.h:534:7: warning: comparison of distinct pointer types ('typeof (len) *' (aka 'unsigned int *') and 'typeof ((1UL << 12)) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
534 | n = min(len, PAGE_SIZE);
| ^~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
67 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
36 | __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
26 | (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
20 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
drivers/nvme/target/fc.c:176:1: warning: unused function 'nvmet_fc_iodnum' [-Wunused-function]
176 | nvmet_fc_iodnum(struct nvmet_fc_ls_iod *iodptr)
| ^
drivers/nvme/target/fc.c:182:1: warning: unused function 'nvmet_fc_fodnum' [-Wunused-function]
182 | nvmet_fc_fodnum(struct nvmet_fc_fcp_iod *fodptr)
| ^
10 warnings generated.
--
In file included from drivers/nvme/target/loop.c:7:
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]
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 drivers/nvme/target/loop.c:7:
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]
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 drivers/nvme/target/loop.c:7:
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]
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);
| ~~~~~~~~~~ ^
In file included from drivers/nvme/target/loop.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
>> include/linux/highmem.h:525:7: warning: comparison of distinct pointer types ('typeof (len) *' (aka 'unsigned int *') and 'typeof ((1UL << 12) - ((unsigned long)(offset) & ~(~((1 << 12) - 1)))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
525 | n = min(len, PAGE_SIZE - offset_in_page(offset));
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
67 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
36 | __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
26 | (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
20 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
In file included from drivers/nvme/target/loop.c:8:
In file included from include/linux/blk-mq.h:5:
In file included from include/linux/blkdev.h:9:
In file included from include/linux/blk_types.h:10:
In file included from include/linux/bvec.h:10:
>> include/linux/highmem.h:534:7: warning: comparison of distinct pointer types ('typeof (len) *' (aka 'unsigned int *') and 'typeof ((1UL << 12)) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
534 | n = min(len, PAGE_SIZE);
| ^~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:67:19: note: expanded from macro 'min'
67 | #define min(x, y) __careful_cmp(x, y, <)
| ^~~~~~~~~~~~~~~~~~~~~~
include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
36 | __builtin_choose_expr(__safe_cmp(x, y), \
| ^~~~~~~~~~~~~~~~
include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
26 | (__typecheck(x, y) && __no_side_effects(x, y))
| ^~~~~~~~~~~~~~~~~
include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
20 | (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
| ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~
8 warnings generated.
vim +525 include/linux/highmem.h
509
510 /**
511 * memcpy_to_folio - Copy a range of bytes to a folio
512 * @folio: The folio to write to.
513 * @offset: The first byte in the folio to store to.
514 * @from: The memory to copy from.
515 * @len: The number of bytes to copy.
516 */
517 static inline void memcpy_to_folio(struct folio *folio, size_t offset,
518 const char *from, size_t len)
519 {
520 size_t n = len;
521
522 VM_BUG_ON(offset + len > folio_size(folio));
523
524 if (folio_test_highmem(folio))
> 525 n = min(len, PAGE_SIZE - offset_in_page(offset));
526 for (;;) {
527 char *to = kmap_local_folio(folio, offset);
528 memcpy(to, from, n);
529 kunmap_local(to);
530 if (!folio_test_highmem(folio) || n == len)
531 break;
532 offset += n;
533 len -= n;
> 534 n = min(len, PAGE_SIZE);
535 }
536 flush_dcache_folio(folio);
537 }
538
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2023-06-14 18:39 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 11:46 [PATCH 0/7] RFC: high-order folio support for I/O Hannes Reinecke
2023-06-14 11:46 ` [PATCH 1/7] brd: use XArray instead of radix-tree to index backing pages Hannes Reinecke
2023-06-14 12:45 ` Matthew Wilcox
2023-06-14 12:50 ` Pankaj Raghav
2023-06-14 13:03 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 2/7] brd: convert to folios Hannes Reinecke
2023-06-14 13:45 ` Matthew Wilcox
2023-06-14 13:50 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 3/7] brd: abstract page_size conventions Hannes Reinecke
2023-06-14 11:46 ` [PATCH 4/7] brd: make sector size configurable Hannes Reinecke
2023-06-14 12:55 ` Matthew Wilcox
2023-06-14 13:02 ` Hannes Reinecke
2023-06-15 2:17 ` Dave Chinner
2023-06-15 5:55 ` Christoph Hellwig
2023-06-15 6:33 ` Hannes Reinecke
2023-06-15 6:23 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 5/7] brd: make logical " Hannes Reinecke
2023-06-14 11:46 ` [PATCH 6/7] mm/filemap: allocate folios with mapping blocksize Hannes Reinecke
[not found] ` <CGME20230619080901eucas1p224e67aa31866d2ad8d259b2209c2db67@eucas1p2.samsung.com>
2023-06-19 8:08 ` Pankaj Raghav
2023-06-19 8:42 ` Hannes Reinecke
2023-06-19 22:57 ` Dave Chinner
2023-06-20 0:00 ` Matthew Wilcox
2023-06-20 5:57 ` Hannes Reinecke
2023-06-14 11:46 ` [PATCH 7/7] mm/readahead: align readahead down to " Hannes Reinecke
2023-06-14 13:17 ` [PATCH 0/7] RFC: high-order folio support for I/O Hannes Reinecke
2023-06-14 13:53 ` Matthew Wilcox
2023-06-14 15:06 ` Hannes Reinecke
2023-06-14 15:35 ` Hannes Reinecke
2023-06-14 17:46 ` Matthew Wilcox
2023-06-14 23:53 ` Dave Chinner
2023-06-15 6:21 ` Hannes Reinecke
2023-06-15 8:51 ` Dave Chinner
2023-06-16 16:06 ` Kent Overstreet
2023-06-15 3:44 ` Dave Chinner
2023-06-14 13:48 ` [PATCH 1/2] highmem: Add memcpy_to_folio() Matthew Wilcox (Oracle)
2023-06-14 18:38 ` kernel test robot [this message]
2023-06-14 19:30 ` kernel test robot
2023-06-15 5:58 ` Christoph Hellwig
2023-06-15 12:16 ` Matthew Wilcox
2023-06-14 13:48 ` [PATCH 2/2] highmem: Add memcpy_from_folio() Matthew Wilcox (Oracle)
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