On Fri, Apr 16, 2021 at 11:37:19AM +0200, Peter Enderborg wrote:

diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c index 6fa761c9cc78..3c1a82b51a6f 100644 --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -16,6 +16,7 @@ #ifdef CONFIG_CMA #include <linux/cma.h> #endif +#include <linux/dma-buf.h> #include <asm/page.h> #include "internal.h" @@ -145,6 +146,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v) show_val_kb(m, "CmaFree: ", global_zone_page_state(NR_FREE_CMA_PAGES)); #endif

• show_val_kb(m, "DmaBufTotal: ", dma_buf_get_size());

hugetlb_report_meminfo(m);

... and if CONFIG_DMA_SHARED_BUFFER is not set ...?