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D38559.diff
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diff --git a/sys/kern/vfs_aio.c b/sys/kern/vfs_aio.c
--- a/sys/kern/vfs_aio.c
+++ b/sys/kern/vfs_aio.c
@@ -2493,10 +2493,9 @@
atomic_add_int(&job->outblock, nblks);
else
atomic_add_int(&job->inblock, nblks);
- atomic_subtract_int(&job->nbio, 1);
- if (atomic_load_int(&job->nbio) == 0) {
+ if (atomic_fetchadd_int(&job->nbio, -1) == 1) {
if (atomic_load_int(&job->error))
aio_complete(job, -1, job->error);
else
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D38559.diff (435 B)
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D38559: aio: Fix a test and set race in aio_biowakeup.
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