• Tejun Heo's avatar
    sysfs, kobject: add sysfs wrapper for kernfs_enable_ns() · fa4cd451
    Tejun Heo authored
    Currently, kobject is invoking kernfs_enable_ns() directly.  This is
    fine now as sysfs and kernfs are enabled and disabled together.  If
    sysfs is disabled, kernfs_enable_ns() is switched to dummy
    implementation too and everything is fine; however, kernfs will soon
    have its own config option CONFIG_KERNFS and !SYSFS && KERNFS will be
    possible, which can make kobject call into non-dummy
    kernfs_enable_ns() with NULL kernfs_node pointers leading to an oops.
    
    Introduce sysfs_enable_ns() which is a wrapper around
    kernfs_enable_ns() so that it can be made a noop depending only on
    CONFIG_SYSFS regardless of the planned CONFIG_KERNFS.
    Signed-off-by: default avatarTejun Heo <tj@kernel.org>
    Reported-by: default avatarFengguang Wu <fengguang.wu@intel.com>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    fa4cd451
kobject.c 25.5 KB