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| author | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 10:43:19 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 07:58:36 -0700 |
| commit | 6668ed271eaefaa63e686bdfbedaeb7b8e492722 (patch) | |
| tree | 58e8288fead484f6755ad0815fc74c3742663761 /sound/soc/codecs/wm8804.h | |
| download | linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.tar.gz linux-stable-6668ed271eaefaa63e686bdfbedaeb7b8e492722.zip | |
selftests/bpf: Reject graph kptr use after RCU unlockgrafted
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 <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'sound/soc/codecs/wm8804.h')
| -rw-r--r-- | sound/soc/codecs/wm8804.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/sound/soc/codecs/wm8804.h b/sound/soc/codecs/wm8804.h new file mode 100644 index 000000000..64f3ccc9a --- /dev/null +++ b/sound/soc/codecs/wm8804.h @@ -0,0 +1,70 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * wm8804.h -- WM8804 S/PDIF transceiver driver + * + * Copyright 2010 Wolfson Microelectronics plc + * + * Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com> + */ + +#ifndef _WM8804_H +#define _WM8804_H + +#include <linux/regmap.h> + +/* + * Register values. + */ +#define WM8804_RST_DEVID1 0x00 +#define WM8804_DEVID2 0x01 +#define WM8804_DEVREV 0x02 +#define WM8804_PLL1 0x03 +#define WM8804_PLL2 0x04 +#define WM8804_PLL3 0x05 +#define WM8804_PLL4 0x06 +#define WM8804_PLL5 0x07 +#define WM8804_PLL6 0x08 +#define WM8804_SPDMODE 0x09 +#define WM8804_INTMASK 0x0A +#define WM8804_INTSTAT 0x0B +#define WM8804_SPDSTAT 0x0C +#define WM8804_RXCHAN1 0x0D +#define WM8804_RXCHAN2 0x0E +#define WM8804_RXCHAN3 0x0F +#define WM8804_RXCHAN4 0x10 +#define WM8804_RXCHAN5 0x11 +#define WM8804_SPDTX1 0x12 +#define WM8804_SPDTX2 0x13 +#define WM8804_SPDTX3 0x14 +#define WM8804_SPDTX4 0x15 +#define WM8804_SPDTX5 0x16 +#define WM8804_GPO0 0x17 +#define WM8804_GPO1 0x18 +#define WM8804_GPO2 0x1A +#define WM8804_AIFTX 0x1B +#define WM8804_AIFRX 0x1C +#define WM8804_SPDRX1 0x1D +#define WM8804_PWRDN 0x1E + +#define WM8804_REGISTER_COUNT 30 +#define WM8804_MAX_REGISTER 0x1E + +#define WM8804_TX_CLKSRC_MCLK 1 +#define WM8804_TX_CLKSRC_PLL 2 + +#define WM8804_CLKOUT_SRC_CLK1 3 +#define WM8804_CLKOUT_SRC_OSCCLK 4 + +#define WM8804_CLKOUT_DIV 1 +#define WM8804_MCLK_DIV 2 + +#define WM8804_MCLKDIV_256FS 0 +#define WM8804_MCLKDIV_128FS 1 + +extern const struct regmap_config wm8804_regmap_config; +extern const struct dev_pm_ops wm8804_pm; + +int wm8804_probe(struct device *dev, struct regmap *regmap); +void wm8804_remove(struct device *dev); + +#endif /* _WM8804_H */ |