Quoting Matthew Auld (2019-08-09 21:29:24)
> +int i915_buddy_alloc_range(struct i915_buddy_mm *mm,
> + struct list_head *blocks,
> + u64 start, u64 size)
> +{
> + struct i915_buddy_block *block;
> + struct i915_buddy_block *buddy;
> + LIST_HEAD(allocated);
> + LIST_HEAD(dfs);
> + u64 end;
> + int err;
> + int i;
> +
> + if (size < mm->chunk_size)
> + return -EINVAL;
> +
> + if (!IS_ALIGNED(start, mm->chunk_size))
> + return -EINVAL;
> +
> + if (!size || !IS_ALIGNED(size, mm->chunk_size))
> + return -EINVAL;
chunk_size can't be 0 and size can't be less than chunk_size, ergo size
is non-zero.
if (!IS_ALIGNED(start | size, mm->chunk_size))
return -EINVAL;
My last brain cell dies happy,
-Chris
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