From aeb709c767aeca996e6011133e4f7bdb2a4af652 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Wed, 30 Sep 2026 09:59:20 +0000 Subject: selftests/bpf: Add a test for objects stuck in free_by_rcu_ttrace Delete all elements of BPF_F_NO_PREALLOC hash map in one batch. The first free_bulk() starts RCU tasks trace GP and the rest of the elements are freed while it's in flight. Wait for call_rcu_ttrace_in_progress to clear in bpf_mem_cache of every cpu and check that free_by_rcu_ttrace and waiting_for_gp_ttrace lists are empty. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20260930095920.601738-4-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- rust/helpers/dma.c | 51 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 rust/helpers/dma.c (limited to 'rust/helpers/dma.c') diff --git a/rust/helpers/dma.c b/rust/helpers/dma.c new file mode 100644 index 000000000..9fbeb507b --- /dev/null +++ b/rust/helpers/dma.c @@ -0,0 +1,51 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +__rust_helper void *rust_helper_dma_alloc_attrs(struct device *dev, size_t size, + dma_addr_t *dma_handle, + gfp_t flag, unsigned long attrs) +{ + return dma_alloc_attrs(dev, size, dma_handle, flag, attrs); +} + +__rust_helper void rust_helper_dma_free_attrs(struct device *dev, size_t size, + void *cpu_addr, + dma_addr_t dma_handle, + unsigned long attrs) +{ + dma_free_attrs(dev, size, cpu_addr, dma_handle, attrs); +} + +__rust_helper int rust_helper_dma_set_mask_and_coherent(struct device *dev, + u64 mask) +{ + return dma_set_mask_and_coherent(dev, mask); +} + +__rust_helper int rust_helper_dma_set_mask(struct device *dev, u64 mask) +{ + return dma_set_mask(dev, mask); +} + +__rust_helper int rust_helper_dma_set_coherent_mask(struct device *dev, u64 mask) +{ + return dma_set_coherent_mask(dev, mask); +} + +__rust_helper int rust_helper_dma_map_sgtable(struct device *dev, struct sg_table *sgt, + enum dma_data_direction dir, unsigned long attrs) +{ + return dma_map_sgtable(dev, sgt, dir, attrs); +} + +__rust_helper size_t rust_helper_dma_max_mapping_size(struct device *dev) +{ + return dma_max_mapping_size(dev); +} + +__rust_helper void rust_helper_dma_set_max_seg_size(struct device *dev, + unsigned int size) +{ + dma_set_max_seg_size(dev, size); +} -- cgit v1.3.1