- /* Could use CLFLUSH here if the CPU supports it (Hammer,P4) */
- if (boot_cpu_data.x86_model >= 4)
+ unsigned long adr = (unsigned long)arg;
+
+ if (adr && cpu_has_clflush) {
+ int i;
+ for (i = 0; i < PAGE_SIZE; i += boot_cpu_data.x86_clflush_size)
+ asm volatile("clflush (%0)" :: "r" (adr + i));
+ } else if (boot_cpu_data.x86_model >= 4)