[PATCH] uml: use host AIO support

This patch makes UML use host AIO support when it (and
/usr/include/linux/aio_abi.h) are present.  This is only the support, with no
consumers - a consumer is coming in the next patch.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 7 insertions, 3 deletions

diff --git a/arch/um/os-Linux/Makefile b/arch/um/os-Linux/Makefile
index 4ddf540284ce..351d96934679 100644
--- a/arch/um/os-Linux/Makefile
+++ b/arch/um/os-Linux/Makefile
@@ -3,11 +3,15 @@
 # Licensed under the GPL
 #
 
-obj-y = elf_aux.o file.o process.o signal.o time.o tty.o user_syms.o drivers/ \
-        sys-$(SUBARCH)/
+obj-y = aio.o elf_aux.o file.o process.o signal.o time.o tty.o user_syms.o \
+        drivers/ sys-$(SUBARCH)/
 
-USER_OBJS := elf_aux.o file.o process.o signal.o time.o tty.o
+USER_OBJS := aio.o elf_aux.o file.o process.o signal.o time.o tty.o
 
 CFLAGS_user_syms.o += -DSUBARCH_$(SUBARCH)
 
+HAVE_AIO_ABI := $(shell [ -r /usr/include/linux/aio_abi.h ] && \
+        echo -DHAVE_AIO_ABI )
+CFLAGS_aio.o += $(HAVE_AIO_ABI)
+
 include arch/um/scripts/Makefile.rules