Re: [PATCH 2/2] powerpc: Switch to generic WARN_ON()/BUG_ON()

Paul Mackerras
2007-10-12T01:24:09Z

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.