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(parent: 7ebfc85) | patch
rds: add missing barrier to release_refill
authorMikulas Patocka <mpatocka@redhat.com>
Wed, 10 Aug 2022 13:00:42 +0000 (09:00 -0400)
committerDavid S. Miller <davem@davemloft.net>
Fri, 12 Aug 2022 09:46:01 +0000 (10:46 +0100)
commit9f414eb409daf4f778f011cf8266d36896bb930b
tree7cfe718f6051784b6098b114be7f00db6d34dbadtree | snapshot
parent7ebfc85e2cd7b08f518b526173e9a33b56b3913bcommit | diff
rds: add missing barrier to release_refill

The functions clear_bit and set_bit do not imply a memory barrier, thus it
may be possible that the waitqueue_active function (which does not take
any locks) is moved before clear_bit and it could miss a wakeup event.

Fix this bug by adding a memory barrier after clear_bit.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
net/rds/ib_recv.c diff | blob | history
Domain: System / Kernel;