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| author |   Christian König <christian.koenig@amd.com> | 2021-05-06 14:16:01 +0200 |
|---|---|---|
| committer | Christian König <christian.koenig@amd.com> | 2021-06-04 14:04:59 +0200 |
| commit | 0c6b522abc2a592468992780babd3c3629c7ceac (patch) | |
| tree | 91c506b02a3b2db54295638d92eb2c1a3e6247b2 /drivers/dma-buf/dma-resv.c | |
| parent | dma-buf: add SPDX header and fix style in dma-resv.c (diff) | |
| download | linux-dev-0c6b522abc2a592468992780babd3c3629c7ceac.tar.xz linux-dev-0c6b522abc2a592468992780babd3c3629c7ceac.zip | |
dma-buf: cleanup dma-resv shared fence debugging a bit v2
Make that a function instead of inline.
v2: improve the kerneldoc wording as suggested by Daniel
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210602111714.212426-3-christian.koenig@amd.com
Diffstat (limited to 'drivers/dma-buf/dma-resv.c')
| -rw-r--r-- | drivers/dma-buf/dma-resv.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 87f5d82d992a..3964df438505 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -208,6 +208,26 @@ int dma_resv_reserve_shared(struct dma_resv *obj, unsigned int num_fences) } EXPORT_SYMBOL(dma_resv_reserve_shared); +#ifdef CONFIG_DEBUG_MUTEXES +/** + * dma_resv_reset_shared_max - reset shared fences for debugging + * @obj: the dma_resv object to reset + * + * Reset the number of pre-reserved shared slots to test that drivers do + * correct slot allocation using dma_resv_reserve_shared(). See also + * &dma_resv_list.shared_max. + */ +void dma_resv_reset_shared_max(struct dma_resv *obj) +{ + /* Test shared fence slot reservation */ + if (rcu_access_pointer(obj->fence)) { + struct dma_resv_list *fence = dma_resv_get_list(obj); + + fence->shared_max = fence->shared_count; + } +} +#endif + /** * dma_resv_add_shared_fence - Add a fence to a shared slot * @obj: the reservation object |