Re: [PATCH 2/2] powerpc: Switch to generic WARN_ON()/BUG_ON()
From: Paul Mackerras <hidden>
Date: 2007-10-12 01:24:09
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Olof Johansson writes:
Not using the ppc-specific WARN_ON/BUG_ON constructs actually saves about 4K text on a ppc64_defconfig. The main reason seems to be that prepping the arguments to the conditional trap instructions is more work than just doing a compare and branch.
It might be more instructions but it takes fewer cycles, I would expect. Do you have the actual instruction sequences to compare? Paul.