diff options
| author |   Paul Mackerras <paulus@samba.org> | 2005-10-31 13:37:12 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-10-31 13:37:12 +1100 |
| commit | 23fd07750a789a66fe88cf173d52a18f1a387da4 (patch) | |
| tree | 06fdd6df35fdb835abdaa9b754d62f6b84b97250 /arch/mips/lib/memcpy.S | |
| parent | ppc: remove duplicate export of cur_cpu_spec (diff) | |
| parent | Merge master.kernel.org:/home/rmk/linux-2.6-serial (diff) | |
| download | linux-dev-23fd07750a789a66fe88cf173d52a18f1a387da4.tar.xz linux-dev-23fd07750a789a66fe88cf173d52a18f1a387da4.zip | |
Merge ../linux-2.6 by hand
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> |