Heiko Carstens <heiko.carstens@xxxxxxxxxx> writes: > There is also other code that relies on this: e.g. copy_mount_options() my be > called with KERNEL_DS. With KERNEL_DS you can *only* access kernel memory, which is unpagable. If you want to access user memory, you _must_ use USER_DS. > If DEBUG_PAGEALLOC is turned on, it would crash badly in kernel space > if it crosses page boundaries and touches an invalid page, even though > it should survive... Accessing an invalid page in kernel space is _always_ a bug. Andreas. -- Andreas Schwab, schwab@xxxxxxxxxxxxxx GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5 "And now for something completely different." -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
