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sched: make task_struct->plug always defined

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If CONFIG_BLOCK isn't set, then it's an empty struct anyway. Just make
it generally available, so we don't break the compile:

kernel/sched/core.c: In function ‘sched_submit_work’:
kernel/sched/core.c:6346:35: error: ‘struct task_struct’ has no member named ‘plug’
 6346 |                 blk_flush_plug(tsk->plug, true);
      |                                   ^~
kernel/sched/core.c: In function ‘io_schedule_prepare’:
kernel/sched/core.c:8357:20: error: ‘struct task_struct’ has no member named ‘plug’
 8357 |         if (current->plug)
      |                    ^~
kernel/sched/core.c:8358:39: error: ‘struct task_struct’ has no member named ‘plug’
 8358 |                 blk_flush_plug(current->plug, true);
      |                                       ^~

Reported-by: Nathan Chancellor <nathan@kernel.org>
Fixes: 008f75a20e ("block: cleanup the flush plug helpers")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2021-10-22 19:35:45 -06:00
parent 8bdf7b3fe1
commit 599593a82f
1 changed files with 0 additions and 2 deletions
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include/linux/sched.h
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@ -1160,10 +1160,8 @@ struct task_struct {
/* Stacked block device info: */
struct bio_list *bio_list;
#ifdef CONFIG_BLOCK
/* Stack plugging: */
struct blk_plug *plug;
#endif
/* VM state: */
struct reclaim_state *reclaim_state;