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Subject[linux-next][bisected c7c133f3][gcc 4.8.5] build fail with error: first argument to ‘ builtin choose expr’ not a constant

Today's next kernel fails to build with gcc 4.8.5 on powerpc machine.

./include/linux/jiffies.h: In function ‘jiffies_delta_to_clock_t’:
./include/linux/kernel.h:855:2: error: first argument to ‘__builtin_choose_expr’ not a constant
__builtin_choose_expr(__builtin_constant_p(x) && \
./include/linux/kernel.h:867:19: note: in expansion of macro ‘__max’
#define max(x, y) __max(typeof(x), typeof(y), x, y)

Machine Type: Power8 Baremetal
gcc: 4.8.5

Builds fine when below patch is reverted
c7c133f3 kernel.h: skip single-eval logic on literals in min()/max()


Abdul Haleem
IBM Linux Technology Centre

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