powerpc/mm: Don't call __flush_dcache_icache_phys() with PA>VA
__flush_dcache_icache_phys() requires the ability to access the
memory with the MMU disabled, which means that on a 32-bit system
any memory above 4 GiB is inaccessible. In particular, mpc86xx is
32-bit and can have more than 4 GiB of RAM.
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/arch/powerpc/include/asm/cacheflush.h b/arch/powerpc/include/asm/cacheflush.h
index 30b35ff..6229e6b 100644
--- a/arch/powerpc/include/asm/cacheflush.h
+++ b/arch/powerpc/include/asm/cacheflush.h
@@ -40,7 +40,12 @@
extern void flush_dcache_icache_page(struct page *page);
#if defined(CONFIG_PPC32) && !defined(CONFIG_BOOKE)
extern void __flush_dcache_icache_phys(unsigned long physaddr);
-#endif /* CONFIG_PPC32 && !CONFIG_BOOKE */
+#else
+static inline void __flush_dcache_icache_phys(unsigned long physaddr)
+{
+ BUG();
+}
+#endif
extern void flush_dcache_range(unsigned long start, unsigned long stop);
#ifdef CONFIG_PPC32