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Subjectunused-variable warning is getting disabled with clang

Hi All,

When kernel compiled with clang, following line is disabling the
unused-variable warning. This is not the case with gcc.
KBUILD_CFLAGS += $(call cc-disable-warning, unused-variable)

Are there any specific reasons for disabling unused-variable with clang?

The Qualcomm Innovation Center, Inc. is a member of the Code Aurora
Linux Foundation Collaborative Project

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