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padata: Disable BH when taking works lock on MT path
[ Upstream commit 58329c4312
]
As the old padata code can execute in softirq context, disable
softirqs for the new padata_do_mutithreaded code too as otherwise
lockdep will get antsy.
Reported-by: syzbot+0cb5bb0f4bf9e79db3b3@syzkaller.appspotmail.com
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Acked-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
parent
db044fa740
commit
c0643d07f8
1 changed files with 4 additions and 4 deletions
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@ -106,7 +106,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data,
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{
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{
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int i;
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int i;
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spin_lock(&padata_works_lock);
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spin_lock_bh(&padata_works_lock);
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/* Start at 1 because the current task participates in the job. */
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/* Start at 1 because the current task participates in the job. */
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for (i = 1; i < nworks; ++i) {
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for (i = 1; i < nworks; ++i) {
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struct padata_work *pw = padata_work_alloc();
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struct padata_work *pw = padata_work_alloc();
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@ -116,7 +116,7 @@ static int __init padata_work_alloc_mt(int nworks, void *data,
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padata_work_init(pw, padata_mt_helper, data, 0);
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padata_work_init(pw, padata_mt_helper, data, 0);
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list_add(&pw->pw_list, head);
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list_add(&pw->pw_list, head);
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}
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}
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spin_unlock(&padata_works_lock);
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spin_unlock_bh(&padata_works_lock);
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return i;
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return i;
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}
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}
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@ -134,12 +134,12 @@ static void __init padata_works_free(struct list_head *works)
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if (list_empty(works))
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if (list_empty(works))
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return;
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return;
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spin_lock(&padata_works_lock);
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spin_lock_bh(&padata_works_lock);
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list_for_each_entry_safe(cur, next, works, pw_list) {
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list_for_each_entry_safe(cur, next, works, pw_list) {
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list_del(&cur->pw_list);
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list_del(&cur->pw_list);
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padata_work_free(cur);
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padata_work_free(cur);
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}
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}
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spin_unlock(&padata_works_lock);
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spin_unlock_bh(&padata_works_lock);
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}
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}
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static void padata_parallel_worker(struct work_struct *parallel_work)
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static void padata_parallel_worker(struct work_struct *parallel_work)
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