From 2f7d2b74a9dd9140053f143e1c94da0fef3c1109 Mon Sep 17 00:00:00 2001 From: Scott Wood Date: Wed, 15 Apr 2015 19:40:23 -0500 Subject: 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 --- arch/powerpc/include/asm/cacheflush.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'arch/powerpc/include/asm/cacheflush.h') 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(void *page_va); 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 -- cgit v1.1