https://github.com/torvalds/linux
Revision ae8d67b2117f1ec6c8170d6e1af8ded17392bd2c authored by Nick Terrell on 16 November 2021, 03:08:19 UTC, committed by Nick Terrell on 18 November 2021, 21:12:26 UTC
The variable `litLengthSum` is only used by an `assert()`, so when asserts are disabled the compiler doesn't see any usage and warns. This issue is already fixed upstream by PR #2838 [0]. It was reported by the Kernel test robot in [1]. Another approach would be to change zstd's disabled `assert()` definition to use the argument in a disabled branch, instead of ignoring the argument. I've avoided this approach because there are some small changes necessary to get zstd to build, and I would want to thoroughly re-test for performance, since that is slightly changing the code in every function in zstd. It seems like a trivial change, but some functions are pretty sensitive to small changes. However, I think it is a valid approach that I would like to see upstream take, so I've opened Issue #2868 to attempt this upstream. Lastly, I've chosen not to use __maybe_unused because all code in lib/zstd/ must eventually be upstreamed. Upstream zstd can't use __maybe_unused because it isn't portable across all compilers. [0] https://github.com/facebook/zstd/pull/2838 [1] https://lore.kernel.org/linux-mm/202111120312.833wII4i-lkp@intel.com/T/ [2] https://github.com/facebook/zstd/issues/2868 Link: https://lore.kernel.org/r/20211117014949.1169186-2-nickrterrell@gmail.com/ Link: https://lore.kernel.org/r/20211117201459.1194876-2-nickrterrell@gmail.com/ Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Nick Terrell <terrelln@fb.com>
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Tip revision: ae8d67b2117f1ec6c8170d6e1af8ded17392bd2c authored by Nick Terrell on 16 November 2021, 03:08:19 UTC
lib: zstd: Fix unused variable warning
lib: zstd: Fix unused variable warning
Tip revision: ae8d67b
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arch | ||
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certs | ||
crypto | ||
drivers | ||
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include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
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net | ||
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.cocciconfig | -rw-r--r-- | 59 bytes |
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COPYING | -rw-r--r-- | 496 bytes |
CREDITS | -rw-r--r-- | 98.6 KB |
Kbuild | -rw-r--r-- | 1.3 KB |
Kconfig | -rw-r--r-- | 555 bytes |
MAINTAINERS | -rw-r--r-- | 615.6 KB |
Makefile | -rw-r--r-- | 64.1 KB |
README | -rw-r--r-- | 727 bytes |
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