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SubjectRe: [PATCH 1/4] lib: Update LZ4 compressor module
Hi Sven,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.10-rc4 next-20170120]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Sven-Schmidt/Update-LZ4-compressor-module/20170121-231418
reproduce:
# apt-get install sparse
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__


sparse warnings: (new ones prefixed by >>)

include/linux/compiler.h:253:8: sparse: attribute 'no_sanitize_address': unknown attribute
>> lib/lz4/lz4_decompress.c:521:21: sparse: incompatible types for operation (>)
lib/lz4/lz4_decompress.c:521:21: left side has type unsigned long [usertype] *src_len
lib/lz4/lz4_decompress.c:521:21: right side has type int

vim +521 lib/lz4/lz4_decompress.c

505 return -1;
506 }
507 EXPORT_SYMBOL(lz4_decompress_unknownoutputsize);
508
509 int lz4_decompress(const unsigned char *src, size_t *src_len,
510 unsigned char *dest, size_t actual_dest_len) {
511 *src_len = LZ4_decompress_fast(src, dest, (int)actual_dest_len);
512
513 /*
514 * Prior lz4_decompress will return
515 * 0 for success and a negative result for error
516 * new LZ4_decompress_fast returns
517 * - the length of data read on success
518 * - and also a negative result on error
519 * meaning when result > 0, we just return 0 here
520 */
> 521 if (src_len > 0)
522 return 0;
523 else
524 return -1;
525 }
526 EXPORT_SYMBOL(lz4_decompress);
527
528 MODULE_LICENSE("Dual BSD/GPL");
529 MODULE_DESCRIPTION("LZ4 decompressor");

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation

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