[MIPS] Hook for platforms to define cachability of /dev/mem regions

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index cc9a9d0df979..7e082bceed57 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -75,6 +75,13 @@ static inline int uncached_access(struct file *file, unsigned long addr)
          * On ia64, we ignore O_SYNC because we cannot tolerate memory attribute aliases.
          */
         return !(efi_mem_attributes(addr) & EFI_MEMORY_WB);
+#elif defined(CONFIG_MIPS)
+        {
+                extern int __uncached_access(struct file *file,
+                                             unsigned long addr);
+
+                return __uncached_access(file, addr);
+        }
 #else
         /*
          * Accessing memory above the top the kernel knows about or through a file pointer