Revision 645efa84f6c7566ea863ed37a8b3247247f72e02 authored by Mikulas Patocka on 05 February 2019, 10:09:00 UTC, committed by Mike Snitzer on 06 February 2019, 22:24:37 UTC
Block core changes to switch bio-based IO accounting to be percpu had a side-effect of altering DM core to now rely on calling waitqueue_active (in both bio-based and request-based) to check if another task is in dm_wait_for_completion(). A memory barrier is needed before calling waitqueue_active(). DM core doesn't piggyback on a preceding memory barrier so it must explicitly use its own. For more details on why using waitqueue_active() without a preceding barrier is unsafe, please see the comment before the waitqueue_active() definition in include/linux/wait.h. Add the missing memory barrier by switching to using wq_has_sleeper(). Fixes: 6f75723190d8 ("dm: remove the pending IO accounting") Fixes: c4576aed8d85 ("dm: fix request-based dm's use of dm_wait_for_completion") Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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keys | ||
loadpin | ||
selinux | ||
smack | ||
tomoyo | ||
yama | ||
Kconfig | -rw-r--r-- | 9.8 KB |
Makefile | -rw-r--r-- | 1.0 KB |
commoncap.c | -rw-r--r-- | 38.9 KB |
device_cgroup.c | -rw-r--r-- | 20.4 KB |
inode.c | -rw-r--r-- | 10.5 KB |
lsm_audit.c | -rw-r--r-- | 10.6 KB |
min_addr.c | -rw-r--r-- | 1.3 KB |
security.c | -rw-r--r-- | 45.7 KB |
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