dma mapping : export caller to vmallocinfo

For example on arm64 board, this add info to "user" entries in vmallocinfo

Before :
[...]
0xffffff8008997000 0xffffff80089d8000 266240 user
[...]

Afer :
[...]
0xffffff8008997000 0xffffff80089d8000 266240 atomic_pool_init+0x0/0x1d8 user
[...]

This help to debug mapping issues, and is consistent with others entries
(ioremap, vmalloc, ...) that already provide caller.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Matthieu CASTET <matthieu.castet@parrot.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c
index 5f62090bda2435e3419720c8a5ecdcf826e19018..b45c5bcaeccbe9b476a6baf941ed653fe16bd89f 100644 (file)
--- a/arch/arm64/mm/dma-mapping.c
+++ b/arch/arm64/mm/dma-mapping.c
@@ -166,7 +166,7 @@ static void *__dma_alloc(struct device *dev, size_t size,
        /* create a coherent mapping */
        page = virt_to_page(ptr);
        coherent_ptr = dma_common_contiguous_remap(page, size, VM_USERMAP,
-                                                  prot, NULL);
+                                                  prot, __builtin_return_address(0));
        if (!coherent_ptr)
                goto no_map;