Hi,
On 13/02/15 01:26, Sasha Levin wrote:
> Provides a userspace interface to trigger a CMA allocation.
>
> Usage:
>
> echo [pages] > alloc
>
> This would provide testing/fuzzing access to the CMA allocation paths.
>
> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
> ---
> mm/cma.c | 6 ++++++
> mm/cma.h | 4 ++++
> mm/cma_debug.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++--
> 3 files changed, 64 insertions(+), 2 deletions(-)
>
> diff --git a/mm/cma_debug.c b/mm/cma_debug.c
> index 3a25413..5bd6863 100644
> --- a/mm/cma_debug.c
> +++ b/mm/cma_debug.c
> @@ -23,8 +32,48 @@ static int cma_debugfs_get(void *data, u64 *val)
>
> DEFINE_SIMPLE_ATTRIBUTE(cma_debugfs_fops, cma_debugfs_get, NULL, "%llu\n");
>
> -static void cma_debugfs_add_one(struct cma *cma, int idx)
> +static void cma_add_to_cma_mem_list(struct cma *cma, struct cma_mem *mem)
> +{
> + spin_lock(&cma->mem_head_lock);
> + hlist_add_head(&mem->node, &cma->mem_head);
> + spin_unlock(&cma->mem_head_lock);
> +}
> +
> +static int cma_alloc_mem(struct cma *cma, int count)
> +{
> + struct cma_mem *mem;
> + struct page *p;
> +
> + mem = kzalloc(sizeof(*mem), GFP_KERNEL);
> + if (!mem)
> + return -ENOMEM;
> +
> + p = cma_alloc(cma, count, CONFIG_CMA_ALIGNMENT);
If CONFIG_DMA_CMA (and therefore CONFIG_CMA_ALIGNMENT) isn't configured
then building fails.
> mm/cma_debug.c: In function ‘cma_alloc_mem’:
> mm/cma_debug.c:223:28: error: ‘CONFIG_CMA_ALIGNMENT’ undeclared (first use in this function)
> p = cma_alloc(cma, count, CONFIG_CMA_ALIGNMENT);
> ^
Also, could you please fix the whitespace errors in your patches?
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