diff options
Diffstat (limited to 'arch/mips/lib/memcpy.S')
| -rw-r--r-- | arch/mips/lib/memcpy.S | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/mips/lib/memcpy.S b/arch/mips/lib/memcpy.S index a78865f76547..7f9aafa4d80e 100644 --- a/arch/mips/lib/memcpy.S +++ b/arch/mips/lib/memcpy.S @@ -13,6 +13,21 @@ * Mnemonic names for arguments to memcpy/__copy_user */ #include <linux/config.h> + +/* + * Hack to resolve longstanding prefetch issue + * + * Prefetching may be fatal on some systems if we're prefetching beyond the + * end of memory on some systems. It's also a seriously bad idea on non + * dma-coherent systems. + */ +#if !defined(CONFIG_DMA_COHERENT) || !defined(CONFIG_DMA_IP27) +#undef CONFIG_CPU_HAS_PREFETCH +#endif +#ifdef CONFIG_MIPS_MALTA +#undef CONFIG_CPU_HAS_PREFETCH +#endif + #include <asm/asm.h> #include <asm/asm-offsets.h> #include <asm/regdef.h> |