diff options
| author | Lucas Stach <l.stach@pengutronix.de> | 2018-01-11 17:48:29 +0100 |
|---|---|---|
| committer | Lucas Stach <l.stach@pengutronix.de> | 2019-02-27 23:51:51 +0100 |
| commit | 372c9329e5aa896683999301d9cb10ef14da92af (patch) | |
| tree | 92dde1f746abe9e1234a64512ba1cf23bbb9e0c0 /include/linux/reservation.h | |
| parent | 547c7138bcfb869c4cda6548f358eaa64102cccf (diff) | |
| download | lwn-372c9329e5aa896683999301d9cb10ef14da92af.tar.gz lwn-372c9329e5aa896683999301d9cb10ef14da92af.zip | |
dma-buf: clarify locking documentation for reservation_object_get_excl
The documentation was misleading, as for a lot of use-cases holding
the RCU read side lock is sufficient.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180111165302.25556-2-l.stach@pengutronix.de
Diffstat (limited to 'include/linux/reservation.h')
| -rw-r--r-- | include/linux/reservation.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/reservation.h b/include/linux/reservation.h index 2f0ffca35780..ee750765cc94 100644 --- a/include/linux/reservation.h +++ b/include/linux/reservation.h @@ -228,7 +228,8 @@ reservation_object_unlock(struct reservation_object *obj) * @obj: the reservation object * * Returns the exclusive fence (if any). Does NOT take a - * reference. The obj->lock must be held. + * reference. Writers must hold obj->lock, readers may only + * hold a RCU read side lock. * * RETURNS * The exclusive fence or NULL |