hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

dma-buf: Prettify typecasts for dma-fence-chain 

Inside dma-fence-chain, we use a cmpxchg on an RCU-protected pointer. To
avoid the sparse warning for using the RCU pointer directly, we have to
cast away the __rcu annotation. However, we don't need to use void*
everywhere and can stick to the dma_fence*.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200409110101.18400-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2020-04-09 12:00:59 +01:00
parent 4d1b58d5ea
commit 29da47cfc1
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/dma-buf/dma-fence-chain.c
View File

@ -62,7 +62,8 @@ struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence)
replacement = NULL;
}
tmp = cmpxchg((void **)&chain->prev, (void *)prev, (void *)replacement);
tmp = cmpxchg((struct dma_fence __force **)&chain->prev,
prev, replacement);
if (tmp == prev)
dma_fence_put(tmp);
else