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SubjectRe: arch/i386/kernel/mpparse.c warning fixes
William Lee Irwin III writes:
>> - if (m->mpc_apicid > MAX_APICS) {
>> + if (MAX_APICS - m->mpc_apicid <= 0) {
>> printk(KERN_WARNING "Processor #%d INVALID. (Max ID: %d).\n",
>> m->mpc_apicid, MAX_APICS);
>> --num_processors;

On Thu, May 22, 2003 at 06:07:43PM +0200, wrote:
> Eeew. Whatever the original problem is, this "fix" is just too
> obscure and ugly.

m->mpc_apicid is an 8-bit type; MAX_APICS can be 256. The above fix
properly compares two integral expressions of equal width.

Also, as MAX_APICS-1 is reserved for the broadcast physical APIC ID
(it's 0xF for serial APIC and 0xFF for xAPIC) the small semantic change
here is correct.

-- wli
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