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.le...@oracle.com> > --- > 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? -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/