Hi,
The build is broken with the following kernel configuration:
- net-2.6.25
- Support for network namespaces enabled (CONFIG_NET_NS=y)
- CONFIG_RCU_TRACE=y
CONFIG_RCU_TRACE can be set by:
make menuconfig ->Processor type and features->Enable tracing for RCU.
- The error in build is :
fs/built-in.o: In function `debugfs_init':
/work/src/netGit2.6.25/2.6.25/fs/debugfs/inode.c:435: undefined
reference to `kernel_kobj'
make: *** [.tmp_vmlinux1] Error 1
The reason is : RCU_TRACE selects DEBUG_FS,
but CONFIG_NET_NS depends on EXPERIMENTAL && !SYSFS;
debugfs can't be built without sysfs.
There is currently a bit of mess with SYSFS and in fact it seems that
maybe selecting DEBUG_FS
should depend on SYSFS; to avoid this problem in the build,
this patch adds !DEBUG_FS to CONFIG_NET_NS dependencies in net/Kconfig.
This way, if CONFIG_RCU_TRACE is set, ( or other configuration items which
selects DEBUG_FS), we cannot set CONFIG_NET_NS.
Regards,
Rami Rosen
Signed-off-by: Rami Rosen <[EMAIL PROTECTED]>
diff --git a/net/Kconfig b/net/Kconfig
index b6a5d45..82337e2 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -30,7 +30,7 @@ menu "Networking options"
config NET_NS
bool "Network namespace support"
default n
- depends on EXPERIMENTAL && !SYSFS
+ depends on EXPERIMENTAL && !SYSFS && !DEBUG_FS
help
Allow user space to create what appear to be multiple instances
of the network stack.
