Re: [PATCH -next] cred: conditionally declare groups-related functions

The groups-related functions declared in include/linux/cred.h are defined in kernel/groups.c, which is compiled only when CONFIG_MULTIUSER=y. Move all these function declarations under #ifdef CONFIG_MULTIUSER to help avoid accidental usage in contexts where CONFIG_MULTIUSER might be disabled. This patch also adds a fallback for groups_search(). Currently this function is only called from kernel/groups.c itself and keys/permissions.c, which depends on CONFIG_MULTIUSER. However, the audit subsystem (which does not depend on CONFIG_MULTIUSER) calls this function in -next, so the fallback will be needed to avoid compilation errors or ugly workarounds. See also: https://lkml.org/lkml/2018/6/20/670 https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit.git/commit/... Reported-by: Randy Dunlap <rdunlap(a)infradead.org&gt; Signed-off-by: Ondrej Mosnacek <omosnace(a)redhat.com&gt;

--- include/linux/cred.h | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)