proc: make config PROC_CHILDREN depend on PROC_FS

Commit 2e13ba54a268 ("fs, proc: introduce CONFIG_PROC_CHILDREN")
introduces the config PROC_CHILDREN to configure kernels to provide the
/proc/<pid>/task/<tid>/children file.

When one deselects PROC_FS for kernel builds without /proc/, the config
PROC_CHILDREN has no effect anymore, but is still visible in menuconfig.

Add the dependency on PROC_FS to make the PROC_CHILDREN option disappear
for kernel builds without /proc/.

Link: https://lkml.kernel.org/r/20220909122529.1941-1-lukas.bulwahn@gmail.com
Fixes: 2e13ba54a268 ("fs, proc: introduce CONFIG_PROC_CHILDREN")
Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Iago López Galeiras <iago@endocode.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index c930001..32b1116 100644 (file)
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -92,6 +92,7 @@ config PROC_PAGE_MONITOR
 
 config PROC_CHILDREN
        bool "Include /proc/<pid>/task/<tid>/children file"
+       depends on PROC_FS
        default n
        help
          Provides a fast way to retrieve first level children pids of a task. See