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Message-ID: <18190.52379.97647.468384@cargo.ozlabs.ibm.com> Date: Fri, 12 Oct 2007 11:23:39 +1000 From: Paul Mackerras <paulus@...ba.org> To: Olof Johansson <olof@...om.net> Cc: linux-kernel@...r.kernel.org, akpm@...ux-foundation.org, lethal@...ux-sh.org, kyle@...isc-linux.org, grundler@...isc-linux.org, linuxppc-dev@...abs.org Subject: Re: [PATCH 2/2] powerpc: Switch to generic WARN_ON()/BUG_ON() 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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