9p-virtio needs is_vmalloc_or_module_addr exported before a patch can be merged to prevent the virtio zero-copy routines from triggering a hypervisor page fault when loading kernel modules:
https://groups.google.com/forum/#!topic/linux.kernel/eRR7AyLE29Y Without this export, the kernel build breaks with that patch applied and CONFIG_NET_9P_VIRTIO=m. With this export in place, all is well. Signed-off-by: Richard Yao <r...@gentoo.org> --- mm/vmalloc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 0fdf968..8a2e54f 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -218,6 +218,7 @@ int is_vmalloc_or_module_addr(const void *x) #endif return is_vmalloc_addr(x); } +EXPORT_SYMBOL(is_vmalloc_or_module_addr); /* * Walk a vmap address to the struct page it maps. -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
