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sched/psi: Select KERNFS as needed

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Users of KERNFS should select it to enforce its being built, so
do this to prevent a build error.

In file included from ../kernel/sched/build_utility.c:97:
../kernel/sched/psi.c: In function 'psi_trigger_poll':
../kernel/sched/psi.c:1479:17: error: implicit declaration of function 'kernfs_generic_poll' [-Werror=implicit-function-declaration]
 1479 |                 kernfs_generic_poll(t->of, wait);

Fixes: aff037078e ("sched/psi: use kernfs polling functions for PSI trigger polling")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Suren Baghdasaryan <surenb@google.com>
Link: lore.kernel.org/r/202307310732.r65EQFY0-lkp@intel.com
This commit is contained in:
Randy Dunlap 2023-07-30 20:07:40 -07:00 committed by Peter Zijlstra
parent 4efcc8bc7e
commit 98dfdd9ee9
1 changed files with 1 additions and 0 deletions
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init/Kconfig
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@ -629,6 +629,7 @@ config TASK_IO_ACCOUNTING
config PSI
bool "Pressure stall information tracking"
select KERNFS
help
Collect metrics that indicate how overcommitted the CPU, memory,
and IO capacity are in the system.