diff options
Diffstat (limited to 'arch/sh/include')
| -rw-r--r-- | arch/sh/include/asm/fixmap.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/sh/include/asm/fixmap.h b/arch/sh/include/asm/fixmap.h index 76c5a3099cb..5ac1e40a511 100644 --- a/arch/sh/include/asm/fixmap.h +++ b/arch/sh/include/asm/fixmap.h @@ -46,9 +46,15 @@ * fix-mapped? */ enum fixed_addresses { + /* + * The FIX_CMAP entries are used by kmap_coherent() to get virtual + * addresses which are of a known color, and so their values are + * important. __fix_to_virt(FIX_CMAP_END - n) must give an address + * which is the same color as a page (n<<PAGE_SHIFT). + */ #define FIX_N_COLOURS 8 FIX_CMAP_BEGIN, - FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS), + FIX_CMAP_END = FIX_CMAP_BEGIN + (FIX_N_COLOURS * NR_CPUS) - 1, FIX_UNCACHED, #ifdef CONFIG_HIGHMEM FIX_KMAP_BEGIN, /* reserved pte's for temporary kernel mappings */ |