On Wed, Jan 13, 2016 at 05:42:20AM +0800, Chen Gang wrote: > For me, it really generates a little better code: > > - Both 1-word store and 1-byte store are 1 instruction, normally, they > have the same execution speed (although it is not quite precise). > > - But 1-byte store instruction has short length under CISC archs, which > can generate a little better code globally. > > - For most of archs, 1-word store can process bytes nonalignment cases, > for check_mount() individually, the parameter data may be not word > alignment, which may cause the 1-word store slower than 1-byte store. What the hell do you mean, unaligned? It's given an address of local variable of type int; it _will_ be aligned, or the compiler is FUBAR. As for the inlines... frankly, if gcc generates a different code from having replaced int with bool in those, it's time to do something very nasty to gcc developers. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
