diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2010-04-06 16:51:31 +0200 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2018-10-29 18:20:09 +0100 |
| commit | 41af63d100cf4edbcb28b2d2fef4f7dab06647ab (patch) | |
| tree | a65accf29e2196c327b43d87961bd30f0a38542d /drivers/md/raid5.h | |
| parent | 6cb4a177280f32e044bc7cbaebef0a2c8bc15d7c (diff) | |
md: raid5: Make raid5_percpu handling RT aware
__raid_run_ops() disables preemption with get_cpu() around the access
to the raid5_percpu variables. That causes scheduling while atomic
spews on RT.
Serialize the access to the percpu data with a lock and keep the code
preemptible.
Reported-by: Udo van den Heuvel <udovdh@xs4all.nl>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Udo van den Heuvel <udovdh@xs4all.nl>
Diffstat (limited to 'drivers/md/raid5.h')
| -rw-r--r-- | drivers/md/raid5.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h index 8474c224127b..a3bf907ab2af 100644 --- a/drivers/md/raid5.h +++ b/drivers/md/raid5.h @@ -637,6 +637,7 @@ struct r5conf { int recovery_disabled; /* per cpu variables */ struct raid5_percpu { + spinlock_t lock; /* Protection for -RT */ struct page *spare_page; /* Used when checking P/Q in raid6 */ struct flex_array *scribble; /* space for constructing buffer * lists and performing address |