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 --- sound/soc/codecs/rl6231.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 sound/soc/codecs/rl6231.h (limited to 'sound/soc/codecs/rl6231.h') diff --git a/sound/soc/codecs/rl6231.h b/sound/soc/codecs/rl6231.h new file mode 100644 index 000000000..928082750 --- /dev/null +++ b/sound/soc/codecs/rl6231.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * rl6231.h - RL6231 class device shared support + * + * Copyright 2014 Realtek Semiconductor Corp. + * + * Author: Oder Chiou + */ + +#ifndef __RL6231_H__ +#define __RL6231_H__ + +#define RL6231_PLL_INP_MAX 50000000 +#define RL6231_PLL_INP_MIN 256000 +#define RL6231_PLL_N_MAX 0x1ff +#define RL6231_PLL_K_MAX 0x1f +#define RL6231_PLL_M_MAX 0xf + +struct rl6231_pll_code { + bool m_bp; /* Indicates bypass m code or not. */ + bool k_bp; /* Indicates bypass k code or not. */ + int m_code; + int n_code; + int k_code; +}; + +int rl6231_calc_dmic_clk(int rate); +int rl6231_pll_calc(const unsigned int freq_in, + const unsigned int freq_out, struct rl6231_pll_code *pll_code); +int rl6231_get_clk_info(int sclk, int rate); +int rl6231_get_pre_div(struct regmap *map, unsigned int reg, int sft); + +#endif /* __RL6231_H__ */ -- cgit v1.3.1