m68k: Document that access_ok is broken for !CONFIG_CPU_HAS_ADDRESS_SPACES

Document that access_ok is completely broken for coldfire and friends at
the moment.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Link: https://lore.kernel.org/r/20210916070405.52750-2-hch@lst.de
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/include/asm/uaccess.h b/arch/m68k/include/asm/uaccess.h
index f98208ccbbcd1a3ed3594f092ff0c53b11a4165f..610bfe8d64d5fb1ee7c0e6f2bcfc3c2afc25a0cf 100644 (file)
--- a/arch/m68k/include/asm/uaccess.h
+++ b/arch/m68k/include/asm/uaccess.h
@@ -16,6 +16,10 @@
 static inline int access_ok(const void __user *addr,
                            unsigned long size)
 {
+       /*
+        * XXX: for !CONFIG_CPU_HAS_ADDRESS_SPACES this really needs to check
+        * for TASK_SIZE!
+        */
        return 1;
 }