sched/isolation: Make CONFIG_CPU_ISOLATION depend on CONFIG_SMP

[ Upstream commit 975776841e689dd8ba36df9fa72ac3eca3c2957a ]

kernel/sched/isolation.c obviously makes no sense without CONFIG_SMP, but
the Kconfig entry we have right now:

	config CPU_ISOLATION
		bool "CPU isolation"
		depends on SMP || COMPILE_TEST

allows the creation of pointless .config's which cause
build failures.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20250330134955.GA7910@redhat.com
Closes: https://lore.kernel.org/oe-kbuild-all/202503260646.lrUqD3j5-lkp@intel.com/
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/init/Kconfig b/init/Kconfig
index 5ab47c346ef93a257b1c02eeebc7c058e7b65384..dc7b10a1fad2b7e3e6829499c2a72de122adf41f 100644 (file)
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -711,7 +711,7 @@ endmenu # "CPU/Task time and stats accounting"
 
 config CPU_ISOLATION
        bool "CPU isolation"
-       depends on SMP || COMPILE_TEST
+       depends on SMP
        default y
        help
          Make sure that CPUs running critical tasks are not disturbed by