| Message ID | 20240417170941.797116-9-willy@infradead.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | ntfs3: Convert (most of) ntfs3 to use folios | expand |
On Wed, Apr 17, 2024 at 06:09:36PM +0100, Matthew Wilcox (Oracle) wrote: > Add a memcpy_from_folio_le16() which does the byteswapping. > This is now large folio safe and avoids kmap(). This patch is missing: @@ -476,6 +476,7 @@ static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio, do { const __le16 *from = kmap_local_folio(folio, offset); size_t chunk = len; + int i; if (folio_test_highmem(folio) && chunk > PAGE_SIZE - offset_in_page(offset)) I'll send a new version if needed, but I'll wait for other feedback first.
Hi Matthew,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.9-rc4]
[cannot apply to next-20240418]
[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/ntfs3-Convert-ntfs_read_folio-to-use-a-folio/20240418-011140
base: linus/master
patch link: https://lore.kernel.org/r/20240417170941.797116-9-willy%40infradead.org
patch subject: [PATCH 08/10] ntfs3: Use a folio to read UpCase
config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20240419/202404190823.2p1A9tNE-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240419/202404190823.2p1A9tNE-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/202404190823.2p1A9tNE-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from include/linux/pagemap.h:11,
from lib/buildid.c:7:
include/linux/highmem.h: In function 'memcpy_from_folio_le16':
>> include/linux/highmem.h:484:22: error: 'i' undeclared (first use in this function)
484 | for (i = 0; i < chunk / sizeof(*to); i++)
| ^
include/linux/highmem.h:484:22: note: each undeclared identifier is reported only once for each function it appears in
--
In file included from include/linux/bvec.h:10,
from include/linux/skbuff.h:17,
from include/linux/tcp.h:17,
from include/linux/ipv6.h:101,
from include/net/addrconf.h:61,
from lib/vsprintf.c:41:
include/linux/highmem.h: In function 'memcpy_from_folio_le16':
>> include/linux/highmem.h:484:22: error: 'i' undeclared (first use in this function)
484 | for (i = 0; i < chunk / sizeof(*to); i++)
| ^
include/linux/highmem.h:484:22: note: each undeclared identifier is reported only once for each function it appears in
lib/vsprintf.c: In function 'va_format':
lib/vsprintf.c:1683:9: warning: function 'va_format' might be a candidate for 'gnu_printf' format attribute [-Wsuggest-attribute=format]
1683 | buf += vsnprintf(buf, end > buf ? end - buf : 0, va_fmt->fmt, va);
| ^~~
vim +/i +484 include/linux/highmem.h
469
470 #ifdef __BIG_ENDIAN
471 static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio,
472 size_t offset, size_t len)
473 {
474 VM_BUG_ON(offset + len > folio_size(folio));
475
476 do {
477 const __le16 *from = kmap_local_folio(folio, offset);
478 size_t chunk = len;
479
480 if (folio_test_highmem(folio) &&
481 chunk > PAGE_SIZE - offset_in_page(offset))
482 chunk = PAGE_SIZE - offset_in_page(offset);
483
> 484 for (i = 0; i < chunk / sizeof(*to); i++)
485 *to++ = le16_to_cpu(*from++);
486 kunmap_local(from);
487
488 to += chunk / sizeof(*to);
489 offset += chunk;
490 len -= chunk;
491 } while (len > 0);
492 }
493 #else
494 static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio,
495 size_t offset, size_t len)
496 {
497 memcpy_from_folio((char *)to, folio, offset, len);
498 }
499 #endif
500
Hi Matthew,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on v6.9-rc4]
[cannot apply to next-20240418]
[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/ntfs3-Convert-ntfs_read_folio-to-use-a-folio/20240418-011140
base: linus/master
patch link: https://lore.kernel.org/r/20240417170941.797116-9-willy%40infradead.org
patch subject: [PATCH 08/10] ntfs3: Use a folio to read UpCase
config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20240419/202404190841.KPS2VQgB-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/20240419/202404190841.KPS2VQgB-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/202404190841.KPS2VQgB-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:16:
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 arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:19:
In file included from include/linux/msi.h:27:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
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/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
| ^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
| ^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:19:
In file included from include/linux/msi.h:27:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
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/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
| ^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
| ^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:19:
In file included from include/linux/msi.h:27:
In file included from include/linux/irq.h:20:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
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);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
692 | 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]
700 | 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]
708 | 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]
717 | 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]
726 | 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]
735 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
In file included from arch/s390/kernel/asm-offsets.c:11:
In file included from include/linux/kvm_host.h:41:
In file included from include/linux/kvm_para.h:5:
In file included from include/uapi/linux/kvm_para.h:37:
In file included from arch/s390/include/asm/kvm_para.h:25:
In file included from arch/s390/include/asm/diag.h:12:
In file included from include/linux/if_ether.h:19:
In file included from include/linux/skbuff.h:17:
In file included from include/linux/bvec.h:10:
>> include/linux/highmem.h:484:8: error: use of undeclared identifier 'i'
484 | for (i = 0; i < chunk / sizeof(*to); i++)
| ^
include/linux/highmem.h:484:15: error: use of undeclared identifier 'i'
484 | for (i = 0; i < chunk / sizeof(*to); i++)
| ^
include/linux/highmem.h:484:40: error: use of undeclared identifier 'i'
484 | for (i = 0; i < chunk / sizeof(*to); i++)
| ^
13 warnings and 3 errors generated.
make[3]: *** [scripts/Makefile.build:117: arch/s390/kernel/asm-offsets.s] Error 1
make[3]: Target 'prepare' not remade because of errors.
make[2]: *** [Makefile:1197: prepare0] Error 2
make[2]: Target 'prepare' not remade because of errors.
make[1]: *** [Makefile:240: __sub-make] Error 2
make[1]: Target 'prepare' not remade because of errors.
make: *** [Makefile:240: __sub-make] Error 2
make: Target 'prepare' not remade because of errors.
vim +/i +484 include/linux/highmem.h
469
470 #ifdef __BIG_ENDIAN
471 static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio,
472 size_t offset, size_t len)
473 {
474 VM_BUG_ON(offset + len > folio_size(folio));
475
476 do {
477 const __le16 *from = kmap_local_folio(folio, offset);
478 size_t chunk = len;
479
480 if (folio_test_highmem(folio) &&
481 chunk > PAGE_SIZE - offset_in_page(offset))
482 chunk = PAGE_SIZE - offset_in_page(offset);
483
> 484 for (i = 0; i < chunk / sizeof(*to); i++)
485 *to++ = le16_to_cpu(*from++);
486 kunmap_local(from);
487
488 to += chunk / sizeof(*to);
489 offset += chunk;
490 len -= chunk;
491 } while (len > 0);
492 }
493 #else
494 static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio,
495 size_t offset, size_t len)
496 {
497 memcpy_from_folio((char *)to, folio, offset, len);
498 }
499 #endif
500
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index f6a9ab0f5cad..00700598a717 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -1493,26 +1493,23 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) goto put_inode_out; } - for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) { - const __le16 *src; + idx = 0; + while (idx < (0x10000 * sizeof(u16) >> PAGE_SHIFT)) { u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT); - struct page *page = ntfs_map_page(inode->i_mapping, idx); + struct folio *folio = read_mapping_folio(inode->i_mapping, + idx, NULL); + size_t limit = 0x10000 * sizeof(u16) - idx * PAGE_SIZE; - if (IS_ERR(page)) { - err = PTR_ERR(page); + if (IS_ERR(folio)) { + err = PTR_ERR(folio); ntfs_err(sb, "Failed to read $UpCase (%d).", err); goto put_inode_out; } - src = page_address(page); - -#ifdef __BIG_ENDIAN - for (i = 0; i < PAGE_SIZE / sizeof(u16); i++) - *dst++ = le16_to_cpu(*src++); -#else - memcpy(dst, src, PAGE_SIZE); -#endif - ntfs_unmap_page(page); + memcpy_from_folio_le16(dst, folio, 0, + min(limit, folio_size(folio))); + idx += folio_nr_pages(folio); + folio_put(folio); } shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 00341b56d291..20b5d5a5feaf 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -467,6 +467,37 @@ static inline void memcpy_from_folio(char *to, struct folio *folio, } while (len > 0); } +#ifdef __BIG_ENDIAN +static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio, + size_t offset, size_t len) +{ + VM_BUG_ON(offset + len > folio_size(folio)); + + do { + const __le16 *from = kmap_local_folio(folio, offset); + size_t chunk = len; + + if (folio_test_highmem(folio) && + chunk > PAGE_SIZE - offset_in_page(offset)) + chunk = PAGE_SIZE - offset_in_page(offset); + + for (i = 0; i < chunk / sizeof(*to); i++) + *to++ = le16_to_cpu(*from++); + kunmap_local(from); + + to += chunk / sizeof(*to); + offset += chunk; + len -= chunk; + } while (len > 0); +} +#else +static inline void memcpy_from_folio_le16(u16 *to, struct folio *folio, + size_t offset, size_t len) +{ + memcpy_from_folio((char *)to, folio, offset, len); +} +#endif + /** * memcpy_to_folio - Copy a range of bytes to a folio. * @folio: The folio to write to.
Add a memcpy_from_folio_le16() which does the byteswapping. This is now large folio safe and avoids kmap(). Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> --- fs/ntfs3/super.c | 25 +++++++++++-------------- include/linux/highmem.h | 31 +++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 14 deletions(-)