openwrt-owl/target/linux/ar7/patches-3.9/200-free-mem-below-kernel-o...

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--- a/arch/mips/ar7/memory.c
+++ b/arch/mips/ar7/memory.c
@@ -67,5 +67,11 @@ void __init prom_meminit(void)
void __init prom_free_prom_memory(void)
{
- /* Nothing to free */
+ /* adapted from arch/mips/txx9/generic/setup.c */
+ unsigned long saddr = PHYS_OFFSET + PAGE_SIZE;
+ unsigned long eaddr = __pa_symbol(&_text);
+
+ /* free memory between prom-record and kernel _text base */
+ if (saddr < eaddr)
+ free_init_pages("prom memory", saddr, eaddr);
}