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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /rust/helpers/atomic_ext.c
downloadlinux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz
linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ...
Diffstat (limited to 'rust/helpers/atomic_ext.c')
-rw-r--r--rust/helpers/atomic_ext.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/rust/helpers/atomic_ext.c b/rust/helpers/atomic_ext.c
new file mode 100644
index 000000000..c267d5190
--- /dev/null
+++ b/rust/helpers/atomic_ext.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <asm/barrier.h>
+#include <asm/rwonce.h>
+#include <linux/atomic.h>
+
+#define GEN_READ_HELPER(tname, type) \
+__rust_helper type rust_helper_atomic_##tname##_read(type *ptr) \
+{ \
+ return READ_ONCE(*ptr); \
+}
+
+#define GEN_SET_HELPER(tname, type) \
+__rust_helper void rust_helper_atomic_##tname##_set(type *ptr, type val) \
+{ \
+ WRITE_ONCE(*ptr, val); \
+}
+
+#define GEN_READ_ACQUIRE_HELPER(tname, type) \
+__rust_helper type rust_helper_atomic_##tname##_read_acquire(type *ptr) \
+{ \
+ return smp_load_acquire(ptr); \
+}
+
+#define GEN_SET_RELEASE_HELPER(tname, type) \
+__rust_helper void rust_helper_atomic_##tname##_set_release(type *ptr, type val)\
+{ \
+ smp_store_release(ptr, val); \
+}
+
+#define GEN_READ_SET_HELPERS(tname, type) \
+ GEN_READ_HELPER(tname, type) \
+ GEN_SET_HELPER(tname, type) \
+ GEN_READ_ACQUIRE_HELPER(tname, type) \
+ GEN_SET_RELEASE_HELPER(tname, type) \
+
+GEN_READ_SET_HELPERS(i8, s8)
+GEN_READ_SET_HELPERS(i16, s16)
+GEN_READ_SET_HELPERS(ptr, const void *)
+
+/*
+ * xchg helpers depend on ARCH_SUPPORTS_ATOMIC_RMW and on the
+ * architecture provding xchg() support for i8 and i16.
+ *
+ * The architectures that currently support Rust (x86_64, armv7,
+ * arm64, riscv, and loongarch) satisfy these requirements.
+ */
+#define GEN_XCHG_HELPER(tname, type, suffix) \
+__rust_helper type \
+rust_helper_atomic_##tname##_xchg##suffix(type *ptr, type new) \
+{ \
+ return xchg##suffix(ptr, new); \
+}
+
+#define GEN_XCHG_HELPERS(tname, type) \
+ GEN_XCHG_HELPER(tname, type, ) \
+ GEN_XCHG_HELPER(tname, type, _acquire) \
+ GEN_XCHG_HELPER(tname, type, _release) \
+ GEN_XCHG_HELPER(tname, type, _relaxed) \
+
+GEN_XCHG_HELPERS(i8, s8)
+GEN_XCHG_HELPERS(i16, s16)
+GEN_XCHG_HELPERS(ptr, const void *)
+
+/*
+ * try_cmpxchg helpers depend on ARCH_SUPPORTS_ATOMIC_RMW and on the
+ * architecture provding try_cmpxchg() support for i8 and i16.
+ *
+ * The architectures that currently support Rust (x86_64, armv7,
+ * arm64, riscv, and loongarch) satisfy these requirements.
+ */
+#define GEN_TRY_CMPXCHG_HELPER(tname, type, suffix) \
+__rust_helper bool \
+rust_helper_atomic_##tname##_try_cmpxchg##suffix(type *ptr, type *old, type new)\
+{ \
+ return try_cmpxchg##suffix(ptr, old, new); \
+}
+
+#define GEN_TRY_CMPXCHG_HELPERS(tname, type) \
+ GEN_TRY_CMPXCHG_HELPER(tname, type, ) \
+ GEN_TRY_CMPXCHG_HELPER(tname, type, _acquire) \
+ GEN_TRY_CMPXCHG_HELPER(tname, type, _release) \
+ GEN_TRY_CMPXCHG_HELPER(tname, type, _relaxed) \
+
+GEN_TRY_CMPXCHG_HELPERS(i8, s8)
+GEN_TRY_CMPXCHG_HELPERS(i16, s16)
+GEN_TRY_CMPXCHG_HELPERS(ptr, const void *)