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| author | Jeff Garzik <jgarzik@pobox.com> | 2005-11-05 23:39:24 +0300 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-11-05 23:39:24 +0300 |
| commit | 7211bb9b64f17b23834d91fc3d0c1d78671ee9a8 (patch) | |
| tree | 541909f86c31fee97cd70d28ec2fe5c23e1ceb02 /arch/mips/lib/memcpy.S | |
| parent | f1e691a24955ea987f021f378324fb5003b1b208 (diff) | |
| parent | 70d9d825e0a5a78ec1dacaaaf5c72ff5b0206fab (diff) | |
| download | linux-7211bb9b64f17b23834d91fc3d0c1d78671ee9a8.tar.xz | |
Merge branch 'master'
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> |