"David S. Miller" <davem@redhat.com> writes: > On Tue, 23 Sep 2003 21:09:47 +0200 > Andreas Schwab <schwab@suse.de> wrote: > >> The compiler is allowed to take advantage that there are no unaligned >> accesses. You need to use compiler extensions (like attribute packed) to >> stop it from doing this. > > That's correct, and if the address is misaligned the cpu "traps" > and the kernel fixes up the load/store access to fix it up. Or the compiler generates code to take advantage of the fact that the lower address bits are zero. > That's what we're talking about here. Of course, the kernel language is not ISO C, and never will be. Andreas. -- Andreas Schwab, SuSE Labs, schwab@suse.de SuSE Linux AG, Deutschherrnstr. 15-19, D-90429 Nürnberg Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.htmlReceived on Tue Sep 23 15:19:52 2003
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