[PATCH] uml: reintroduce pcap support

The pcap support was not working because of some linking problems (expressing
the construct in Kbuild was a bit difficult) and because there was no user
request.  Now that this has come back, here's the support.

This has been tested and works on both 32 and 64-bit hosts, even when
"cross-"building 32-bit binaries.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 9 insertions, 5 deletions

diff --git a/arch/um/Makefile b/arch/um/Makefile
index dfcc9eaafaa7..6a7a9f43cdef 100644
--- a/arch/um/Makefile
+++ b/arch/um/Makefile
@@ -56,17 +56,21 @@ include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
 core-y += $(SUBARCH_CORE)
 libs-y += $(SUBARCH_LIBS)
 
-# -Derrno=kernel_errno - This turns all kernel references to errno into
-# kernel_errno to separate them from the libc errno.  This allows -fno-common
-# in CFLAGS.  Otherwise, it would cause ld to complain about the two different
-# errnos.
+# -Dvmap=kernel_vmap affects everything, and prevents anything from
+# referencing the libpcap.o symbol so named.
 
 CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
-        $(ARCH_INCLUDE) $(MODE_INCLUDE)
+        $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
 
 USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
 USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
         $(MODE_INCLUDE) $(ARCH_USER_CFLAGS)
+
+# -Derrno=kernel_errno - This turns all kernel references to errno into
+# kernel_errno to separate them from the libc errno.  This allows -fno-common
+# in CFLAGS.  Otherwise, it would cause ld to complain about the two different
+# errnos.
+
 CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
 CFLAGS += $(call cc-option,-fno-unit-at-a-time,)