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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2020-08-24 23:36:14 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-25 00:17:44 +0300 |
| commit | 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a (patch) | |
| tree | 7d33b5d3fa40ab47f2a5d711fc034a008cc9e83f /lib/zstd/decompress.c | |
| parent | 9907ab371426da8b3cffa6cc3e4ae54829559207 (diff) | |
| download | linux-6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a.tar.xz | |
lib: Revert use of fallthrough pseudo-keyword in lib/
The following build error for powerpc64 was reported by Nathan Chancellor:
"$ scripts/config --file arch/powerpc/configs/powernv_defconfig -e KERNEL_XZ
$ make -skj"$(nproc)" ARCH=powerpc CROSS_COMPILE=powerpc64le-linux- distclean powernv_defconfig zImage
...
In file included from arch/powerpc/boot/../../../lib/decompress_unxz.c:234,
from arch/powerpc/boot/decompress.c:38:
arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c: In function 'dec_main':
arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c:586:4: error: 'fallthrough' undeclared (first use in this function)
586 | fallthrough;
| ^~~~~~~~~~~
This will end up affecting distribution configurations such as Debian
and OpenSUSE according to my testing. I am not sure what the solution
is, the PowerPC wrapper does not set -D__KERNEL__ so I am not sure
that compiler_attributes.h can be safely included."
In order to avoid these sort of problems, it seems that the best
solution is to use /* fall through */ comments instead of the
fallthrough pseudo-keyword macro in lib/, for now.
Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes: df561f6688fe ("treewide: Use fallthrough pseudo-keyword")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-and-tested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/zstd/decompress.c')
| -rw-r--r-- | lib/zstd/decompress.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c index 66cd487a326a..db6761ea4deb 100644 --- a/lib/zstd/decompress.c +++ b/lib/zstd/decompress.c @@ -442,7 +442,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize case set_repeat: if (dctx->litEntropy == 0) return ERROR(dictionary_corrupted); - fallthrough; + /* fall through */ case set_compressed: if (srcSize < 5) return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */ @@ -1768,7 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c return 0; } dctx->expected = 0; /* not necessary to copy more */ - fallthrough; + /* fall through */ case ZSTDds_decodeFrameHeader: memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected); @@ -2309,7 +2309,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB switch (zds->stage) { case zdss_init: ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */ - fallthrough; + /* fall through */ case zdss_loadHeader: { size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize); @@ -2376,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB } zds->stage = zdss_read; } - fallthrough; + /* fall through */ case zdss_read: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2405,7 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB zds->stage = zdss_load; /* pass-through */ } - fallthrough; + /* fall through */ case zdss_load: { size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx); @@ -2438,7 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB /* pass-through */ } } - fallthrough; + /* fall through */ case zdss_flush: { size_t const toFlushSize = zds->outEnd - zds->outStart; |