From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- include/sound/cs48l32.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 include/sound/cs48l32.h (limited to 'include/sound/cs48l32.h') diff --git a/include/sound/cs48l32.h b/include/sound/cs48l32.h new file mode 100644 index 000000000..27b3e7cf9 --- /dev/null +++ b/include/sound/cs48l32.h @@ -0,0 +1,47 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Register definitions for Cirrus Logic CS48L32 + * + * Copyright (C) 2017-2018, 2020, 2022, 2025 Cirrus Logic, Inc. and + * Cirrus Logic International Semiconductor Ltd. + */ + +#ifndef CS48L32_H +#define CS48L32_H + +/* pll_id for snd_soc_component_set_pll() */ +#define CS48L32_FLL1_REFCLK 1 + +/* source for snd_soc_component_set_pll() */ +#define CS48L32_FLL_SRC_NONE -1 +#define CS48L32_FLL_SRC_MCLK1 0 +#define CS48L32_FLL_SRC_PDMCLK 5 +#define CS48L32_FLL_SRC_ASP1_BCLK 8 +#define CS48L32_FLL_SRC_ASP2_BCLK 9 +#define CS48L32_FLL_SRC_ASP1_FSYNC 12 +#define CS48L32_FLL_SRC_ASP2_FSYNC 13 + +/* clk_id for snd_soc_component_set_sysclk() and snd_soc_dai_set_sysclk() */ +#define CS48L32_CLK_SYSCLK_1 1 +#define CS48L32_CLK_SYSCLK_2 2 +#define CS48L32_CLK_SYSCLK_3 3 +#define CS48L32_CLK_SYSCLK_4 4 +#define CS48L32_CLK_DSPCLK 7 +#define CS48L32_CLK_PDM_FLLCLK 13 + +/* source for snd_soc_component_set_sysclk() */ +#define CS48L32_CLK_SRC_MCLK1 0x0 +#define CS48L32_CLK_SRC_FLL1 0x4 +#define CS48L32_CLK_SRC_ASP1_BCLK 0x8 +#define CS48L32_CLK_SRC_ASP2_BCLK 0x9 + +struct cs48l32 { + struct regmap *regmap; + struct device *dev; + struct gpio_desc *reset_gpio; + struct clk *mclk1; + struct regulator_bulk_data core_supplies[2]; + struct regulator *vdd_d; + int irq; +}; +#endif -- cgit v1.3.1