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SubjectRe: [PATCH 3/4] btrfs: Add zstd support
Hi Nick,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.12-rc6 next-20170623]
[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/Nick-Terrell/lib-Add-xxhash-module/20170625-214344
config: blackfin-allyesconfig (attached as .config)
compiler: bfin-uclinux-gcc (GCC) 6.2.0
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=blackfin

All error/warnings (new ones prefixed by >>):

lib//zstd/fse_compress.c: In function 'FSE_buildCTable_wksp':
>> lib//zstd/fse_compress.c:181:1: warning: the frame size of 1036 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
^
lib//zstd/fse_compress.c: In function 'FSE_compress_wksp':
lib//zstd/fse_compress.c:857:1: warning: the frame size of 1552 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
^
--
lib//zstd/compress.c: In function 'ZSTD_compressBlock_lazy':
>> lib//zstd/compress.c:2036:1: error: unable to find a register to spill in class 'CCREGS'
static void ZSTD_compressBlock_lazy(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 1); }
^~~~~~
>> lib//zstd/compress.c:2036:1: error: this is the insn:
(insn 213 11 1172 9 (set (reg:BI 1429)
(eq:BI (reg/v:SI 62 [ mls ])
(const_int 5 [0x5]))) lib//zstd/compress.c:1855 118 {compare_eq}
(nil))
lib//zstd/compress.c:2036: confused by earlier errors, bailing out
--
lib//zstd/huf_decompress.c: In function 'HUF_readDTableX4':
>> lib//zstd/huf_decompress.c:556:1: warning: the frame size of 1636 bytes is larger than 1024 bytes [-Wframe-larger-than=]
}
^

vim +/CCREGS +2036 lib//zstd/compress.c

87a5643e Nick Terrell 2017-06-22 2020 /* Save reps for next block */
87a5643e Nick Terrell 2017-06-22 2021 ctx->repToConfirm[0] = offset_1 ? offset_1 : savedOffset;
87a5643e Nick Terrell 2017-06-22 2022 ctx->repToConfirm[1] = offset_2 ? offset_2 : savedOffset;
87a5643e Nick Terrell 2017-06-22 2023
87a5643e Nick Terrell 2017-06-22 2024 /* Last Literals */
87a5643e Nick Terrell 2017-06-22 2025 {
87a5643e Nick Terrell 2017-06-22 2026 size_t const lastLLSize = iend - anchor;
87a5643e Nick Terrell 2017-06-22 2027 memcpy(seqStorePtr->lit, anchor, lastLLSize);
87a5643e Nick Terrell 2017-06-22 2028 seqStorePtr->lit += lastLLSize;
87a5643e Nick Terrell 2017-06-22 2029 }
87a5643e Nick Terrell 2017-06-22 2030 }
87a5643e Nick Terrell 2017-06-22 2031
87a5643e Nick Terrell 2017-06-22 2032 static void ZSTD_compressBlock_btlazy2(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 1, 2); }
87a5643e Nick Terrell 2017-06-22 2033
87a5643e Nick Terrell 2017-06-22 2034 static void ZSTD_compressBlock_lazy2(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 2); }
87a5643e Nick Terrell 2017-06-22 2035
87a5643e Nick Terrell 2017-06-22 @2036 static void ZSTD_compressBlock_lazy(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 1); }
87a5643e Nick Terrell 2017-06-22 2037
87a5643e Nick Terrell 2017-06-22 2038 static void ZSTD_compressBlock_greedy(ZSTD_CCtx *ctx, const void *src, size_t srcSize) { ZSTD_compressBlock_lazy_generic(ctx, src, srcSize, 0, 0); }
87a5643e Nick Terrell 2017-06-22 2039
87a5643e Nick Terrell 2017-06-22 2040 FORCE_INLINE
87a5643e Nick Terrell 2017-06-22 2041 void ZSTD_compressBlock_lazy_extDict_generic(ZSTD_CCtx *ctx, const void *src, size_t srcSize, const U32 searchMethod, const U32 depth)
87a5643e Nick Terrell 2017-06-22 2042 {
87a5643e Nick Terrell 2017-06-22 2043 seqStore_t *seqStorePtr = &(ctx->seqStore);
87a5643e Nick Terrell 2017-06-22 2044 const BYTE *const istart = (const BYTE *)src;

:::::: The code at line 2036 was first introduced by commit
:::::: 87a5643e3b02e4cb9fb83bf8f6da13be18677883 lib: Add zstd modules

:::::: TO: Nick Terrell <terrelln@fb.com>
:::::: CC: 0day robot <fengguang.wu@intel.com>

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