Rusty Russell wrote: > Currently x86 (similar to x84-64) has a special per-cpu structure > called "i386_pda" which can be easily and efficiently referenced via > the %fs register. An ELF section is more flexible than a structure, > allowing any piece of code to use this area. Indeed, such a section > already exists: the per-cpu area. > > So this patch > (1) Removes the PDA and uses per-cpu variables for each current member. > (2) Replaces the __KERNEL_PDA segment with __KERNEL_PERCPU. > (3) Creates a per-cpu mirror of __per_cpu_offset called this_cpu_off, which > can be used to calculate addresses for this CPU's variables. > (4) Moves the boot cpu's GDT/percpu setup to smp_prepare_boot_cpu(), > immediately after the per-cpu areas are allocated. > > The result is one less x86-specific concept. >
Looks good. I think you can drop x86_add/sub/or_percpu; there are no users. Signed-off-by: Jeremy Fitzhardinge <[EMAIL PROTECTED]> J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/