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authorWill Deacon <will@kernel.org>2021-07-30 14:24:33 +0300
committerPeter Zijlstra <peterz@infradead.org>2021-08-20 13:33:00 +0300
commitb90ca8badbd11488e5f762346b028666808164e7 (patch)
tree38cf3f80ceb6e2ae051c85fbb7b4696fecc90ed6 /init
parent234a503e670be01f72841be9fcf68dfb89a1fa8b (diff)
downloadlinux-b90ca8badbd11488e5f762346b028666808164e7.tar.xz
sched: Introduce task_struct::user_cpus_ptr to track requested affinity
In preparation for saving and restoring the user-requested CPU affinity mask of a task, add a new cpumask_t pointer to 'struct task_struct'. If the pointer is non-NULL, then the mask is copied across fork() and freed on task exit. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Valentin Schneider <Valentin.Schneider@arm.com> Link: https://lore.kernel.org/r/20210730112443.23245-7-will@kernel.org
Diffstat (limited to 'init')
-rw-r--r--init/init_task.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/init/init_task.c b/init/init_task.c
index 562f2ef8d157..2d024066e27b 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -80,6 +80,7 @@ struct task_struct init_task
.normal_prio = MAX_PRIO - 20,
.policy = SCHED_NORMAL,
.cpus_ptr = &init_task.cpus_mask,
+ .user_cpus_ptr = NULL,
.cpus_mask = CPU_MASK_ALL,
.nr_cpus_allowed= NR_CPUS,
.mm = NULL,