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| author | John Ogness <john.ogness@linutronix.de> | 2020-07-07 17:28:04 +0206 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-07-16 11:40:39 -0700 |
| commit | 632ca50f2cbd8809a2fc1934b4b2c9c49bd55e98 (patch) | |
| tree | 17ed0b6ce864b175f2849f7518b7648853618f3c /include/linux/timerqueue.h | |
| parent | 999cf8aeb6c9d4019659efe85ce0594808d071a6 (diff) | |
| download | cachepc-linux-632ca50f2cbd8809a2fc1934b4b2c9c49bd55e98.tar.gz cachepc-linux-632ca50f2cbd8809a2fc1934b4b2c9c49bd55e98.zip | |
af_packet: TPACKET_V3: replace busy-wait loop
A busy-wait loop is used to implement waiting for bits to be copied
from the skb to the kernel buffer before retiring a block. This is
a problem on PREEMPT_RT because the copying task could be preempted
by the busy-waiting task and thus live lock in the busy-wait loop.
Replace the busy-wait logic with an rwlock_t. This provides lockdep
coverage and makes the code RT ready.
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/timerqueue.h')
0 files changed, 0 insertions, 0 deletions