diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-06 22:55:45 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-20 09:40:10 +0100 |
| commit | ac31c7ff8624409ba3c4901df9237a616c187a5d (patch) | |
| tree | f135d25baae0bb1ccfcc6f4511367b09e16a76ac /drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h | |
| parent | 3f186d974826847a07bc7964d79ec4eded475ad9 (diff) | |
futex: Provide distinct return value when owner is exiting
attach_to_pi_owner() returns -EAGAIN for various cases:
- Owner task is exiting
- Futex value has changed
The caller drops the held locks (hash bucket, mmap_sem) and retries the
operation. In case of the owner task exiting this can result in a live
lock.
As a preparatory step for seperating those cases, provide a distinct return
value (EBUSY) for the owner exiting case.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20191106224556.935606117@linutronix.de
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/inc/mod_freesync.h')
0 files changed, 0 insertions, 0 deletions