blackfin: sync data in blackfin write buffer
Sync data in blackfin write buffer to DRAM before return from
copy_to_user.
Otherwise, application may read wrong data from stat syscall occasionally.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h
index 461bb54..57701c3 100644
--- a/arch/blackfin/include/asm/uaccess.h
+++ b/arch/blackfin/include/asm/uaccess.h
@@ -191,6 +191,7 @@
memcpy((void __force *)to, from, n);
else
return n;
+ SSYNC();
return 0;
}