[Devel] [PATCH hci-8.1 v10 06/13] ve/aio: initialize aio fields in ve0

[Konstantin Khorenko]

From: Vladimir Riabchun <vladimir.riabchun at virtuozzo.com>

When aio_nr and aio_max_nr were moved into struct ve_struct,
ve_create() got per-VE defaults, but ve0 was left zero-initialized:
on the host aio_max_nr is 0, so io_setup() fails until
fs.aio-max-nr is raised by hand, and the zeroed aio_nr_lock
triggers a bad magic report with CONFIG_DEBUG_SPINLOCK.

Fixes: 3e96f90392f4a ("ve/fs/aio: aio_nr & aio_max_nr variables virtualization")
https://virtuozzo.atlassian.net/browse/VSTOR-135520

Signed-off-by: Vladimir Riabchun <vladimir.riabchun at virtuozzo.com>
Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>
---
 kernel/ve/ve.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/kernel/ve/ve.c b/kernel/ve/ve.c
index d7546cd5fffaa..c4e5c000bc427 100644
--- a/kernel/ve/ve.c
+++ b/kernel/ve/ve.c
@@ -117,6 +117,11 @@ struct ve_struct ve0 = {
 	.nd_neigh_nr		= ATOMIC_INIT(0),
 	.mnt_avail_nr		= ATOMIC_INIT(INT_MAX),
 	.mnt_max_nr		= INT_MAX,
+#ifdef CONFIG_AIO
+	.aio_nr_lock		= __SPIN_LOCK_UNLOCKED(ve0.aio_nr_lock),
+	.aio_nr			= 0,
+	.aio_max_nr		= AIO_MAX_NR_DEFAULT,
+#endif
 	.meminfo_val		= VE_MEMINFO_SYSTEM,
 	.umh_running_helpers	= ATOMIC_INIT(0),
 	.umh_helpers_waitq	= __WAIT_QUEUE_HEAD_INITIALIZER(ve0.umh_helpers_waitq),

-- 
2.43.0