Messages in this thread | | | Date | Fri, 8 Feb 2019 15:34:03 +0100 | From | Michal Kubecek <> | Subject | Re: Clang warning in drivers/net/ethernet/intel/igc/igc_ethtool.c |
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On Thu, Feb 07, 2019 at 10:09:21PM -0700, Nathan Chancellor wrote: > Hi all, > > After commit 8c5ad0dae93c ("igc: Add ethtool support"), Clang warns: > > drivers/net/ethernet/intel/igc/igc_ethtool.c:9:19: warning: variable 'igc_priv_flags_strings' is not needed and will not be emitted [-Wunneeded-internal-declaration] > static const char igc_priv_flags_strings[][ETH_GSTRING_LEN] = { > ^ > 1 warning generated. > > igc_priv_flags_strings is only used in an ARRAY_SIZE macro, which is a > compile time evaluation, so no reference to it is being emitted in the > final assembly. Is it actually needed and was forgotten to be used > somewhere or could it be eliminated so that Clang no longer warns?
That's because the driver provides get_priv_flags() and set_priv_flags() callbacks in its ethtool_ops to allow querying and setting legacy-rx private flag but it does not provide get_sset_count() and get_strings() to provide list of private flags to userspace ethtool.
Michal Kubecek
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