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/linux/drivers/infiniband/hw/hfi1/
H A Dmmu_rb.c45 struct mmu_rb_handler **handler) in hfi1_mmu_rb_register() argument
74 *handler = h; in hfi1_mmu_rb_register()
78 void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler) in hfi1_mmu_rb_unregister() argument
86 mmgrab(handler->mn.mm); in hfi1_mmu_rb_unregister()
89 mmu_notifier_unregister(&handler->mn, handler->mn.mm); in hfi1_mmu_rb_unregister()
92 * Make sure the wq delete handler is finished running. It will not in hfi1_mmu_rb_unregister()
95 flush_work(&handler->del_work); in hfi1_mmu_rb_unregister()
99 spin_lock_irqsave(&handler->lock, flags); in hfi1_mmu_rb_unregister()
100 while ((node = rb_first_cached(&handler->root))) { in hfi1_mmu_rb_unregister()
102 rb_erase_cached(node, &handler->root); in hfi1_mmu_rb_unregister()
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/linux/net/ipv4/
H A Dtunnel4.c31 int xfrm4_tunnel_register(struct xfrm_tunnel *handler, unsigned short family) in xfrm4_tunnel_register() argument
37 int priority = handler->priority; in xfrm4_tunnel_register()
51 handler->next = *pprev; in xfrm4_tunnel_register()
52 rcu_assign_pointer(*pprev, handler); in xfrm4_tunnel_register()
63 int xfrm4_tunnel_deregister(struct xfrm_tunnel *handler, unsigned short family) in xfrm4_tunnel_deregister() argument
75 if (t == handler) { in xfrm4_tunnel_deregister()
76 *pprev = handler->next; in xfrm4_tunnel_deregister()
90 #define for_each_tunnel_rcu(head, handler) \ argument
91 for (handler = rcu_dereference(head); \
92 handler != NULL; \
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/linux/net/ipv6/
H A Dtunnel6.c32 int xfrm6_tunnel_register(struct xfrm6_tunnel *handler, unsigned short family) in xfrm6_tunnel_register() argument
37 int priority = handler->priority; in xfrm6_tunnel_register()
64 handler->next = *pprev; in xfrm6_tunnel_register()
65 rcu_assign_pointer(*pprev, handler); in xfrm6_tunnel_register()
76 int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family) in xfrm6_tunnel_deregister() argument
101 if (t == handler) { in xfrm6_tunnel_deregister()
102 *pprev = handler->next; in xfrm6_tunnel_deregister()
117 #define for_each_tunnel_rcu(head, handler) \ argument
118 for (handler = rcu_dereference(head); \
119 handler != NULL; \
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H A Dxfrm6_protocol.c41 #define for_each_protocol_rcu(head, handler) \ argument
42 for (handler = rcu_dereference(head); \
43 handler != NULL; \
44 handler = rcu_dereference(handler->next)) \
49 struct xfrm6_protocol *handler; in xfrm6_rcv_cb() local
55 for_each_protocol_rcu(*proto_handlers(protocol), handler) in xfrm6_rcv_cb()
56 if ((ret = handler->cb_handler(skb, err)) <= 0) in xfrm6_rcv_cb()
66 struct xfrm6_protocol *handler; in xfrm6_rcv_encap() local
98 for_each_protocol_rcu(*head, handler) in xfrm6_rcv_encap()
99 if ((ret = handler->input_handler(skb, nexthdr, spi, encap_type)) != -EINVAL) in xfrm6_rcv_encap()
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/linux/drivers/irqchip/
H A Dirq-sifive-plic.c108 static void __plic_toggle(struct plic_handler *handler, int hwirq, int enable) in __plic_toggle() argument
110 u32 __iomem *base = handler->enable_base; in __plic_toggle()
122 handler->enable_save[group] = value; in __plic_toggle()
126 static void plic_toggle(struct plic_handler *handler, int hwirq, int enable) in plic_toggle() argument
130 raw_spin_lock_irqsave(&handler->enable_lock, flags); in plic_toggle()
131 __plic_toggle(handler, hwirq, enable); in plic_toggle()
132 raw_spin_unlock_irqrestore(&handler->enable_lock, flags); in plic_toggle()
141 struct plic_handler *handler = per_cpu_ptr(&plic_handlers, cpu); in plic_irq_toggle() local
143 plic_toggle(handler, d->hwirq, enable); in plic_irq_toggle()
174 struct plic_handler *handler = this_cpu_ptr(&plic_handlers); in plic_irq_eoi() local
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/linux/kernel/
H A Dreboot.c176 * @nb: Info about handler function to be called
177 * @nb->priority: Handler priority. Handlers should follow the
179 * 0: Restart handler of last resort,
181 * 128: Default restart handler; use if no other
182 * restart handler is expected to be available,
185 * 255: Highest priority restart handler, will
196 * If more than one function is registered, the restart handler priority
202 * restart handlers may exist; for example, one restart handler might
204 * In such cases, the restart handler which only restarts part of the
219 * restart handler
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/linux/drivers/soc/fsl/qbman/
H A Dqman_test_stash.c43 * moves it from one cpu to another. (The use of more than one handler per cpu
49 * each forwarding action. To achieve this, each handler will be assigned a
51 * received by a handler, the mixer of the expected sender is XOR'd into all
54 * the current handler. Apart from validating that the frame is taking the
57 * conditional branching. There is a "special" handler designated to act as the
65 * handlers and link-list them (but do no other handler setup).
68 * hp_cpu's 'iterator' to point to its first handler. With each loop,
69 * allocate rx/tx FQIDs and mixer values to the hp_cpu's iterator handler
71 * which connects the last handler to the first (and which is why phase 2
75 * hp_cpu's 'iterator' to point to its first handler. With each loop,
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/linux/drivers/acpi/
H A Dwakeup.c102 * acpi_register_wakeup_handler - Register wakeup handler
104 * @wakeup: Wakeup-handler to call when the SCI has triggered a wakeup
105 * @context: Context to pass to the handler when calling it
108 * a handler which returns true when the device they are managing wants
114 struct acpi_wakeup_handler *handler; in acpi_register_wakeup_handler() local
118 * need to register the handler. in acpi_register_wakeup_handler()
123 handler = kmalloc_obj(*handler); in acpi_register_wakeup_handler()
124 if (!handler) in acpi_register_wakeup_handler()
127 handler->wakeup = wakeup; in acpi_register_wakeup_handler()
128 handler->context = context; in acpi_register_wakeup_handler()
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/linux/drivers/scsi/
H A Dscsi_dh.c3 * SCSI device handler infrastructure.
120 * scsi_dh_handler_attach - Attach a device handler to a device
121 * @sdev - SCSI device the device handler should attach to
122 * @scsi_dh - The device handler to attach
154 sdev->handler = scsi_dh; in scsi_dh_handler_attach()
160 * scsi_dh_handler_detach - Detach a device handler from a device
161 * @sdev - SCSI device the device handler should be detached from
165 sdev->handler->detach(sdev); in scsi_dh_handler_detach()
166 sdev_printk(KERN_NOTICE, sdev, "%s: Detached\n", sdev->handler->name); in scsi_dh_handler_detach()
167 module_put(sdev->handler->module); in scsi_dh_handler_detach()
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/linux/rust/kernel/irq/
H A Drequest.rs24 /// The value that can be returned from a [`Handler`] or a [`ThreadedHandler`].
34 /// Callbacks for an IRQ handler.
35 pub trait Handler: Sync {
36 /// The hard IRQ handler.
42 /// interrupt context, should be deferred to a threaded handler.
81 /// A registration of an IRQ handler for a given IRQ line. in drop()
87 /// handler and process context. [`Completion`] uses interior mutability, so the in drop()
88 /// handler can signal with [`Completion::complete_all()`] and the process
118 /// impl irq::Handler for Data {
126 /// // Registers an IRQ handler fo
30 pub trait Handler: Sync { global() interface
189 handler: T, global() field
239 pub fn handler(&self) -> &T { handler() method
409 handler: T, global() field
460 pub fn handler(&self) -> &T { handler() method
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/linux/arch/arm/probes/uprobes/
H A Dactions-arm.c195 [PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop},
196 [PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop},
197 [PROBES_BRANCH_IMM] = {.handler = simulate_blx1},
198 [PROBES_MRS] = {.handler = simulate_mrs},
199 [PROBES_BRANCH_REG] = {.handler = simulate_blx2bx},
200 [PROBES_CLZ] = {.handler = probes_simulate_nop},
201 [PROBES_SATURATING_ARITHMETIC] = {.handler = probes_simulate_nop},
202 [PROBES_MUL1] = {.handler = probes_simulate_nop},
203 [PROBES_MUL2] = {.handler = probes_simulate_nop},
204 [PROBES_SWP] = {.handler = probes_simulate_nop},
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/linux/arch/xtensa/kernel/
H A Dvectors.S22 * fast handler or the default handler, if no fast handler was registered.
23 * The default handler sets up a C-stack and dispatches the exception to a
24 * registerd C handler in the second-level dispatch table.
26 * Fast handler entry condition:
41 * Note: Neither the kernel nor the user exception handler generate literals.
63 * We switch to the kernel stack and jump to the first level handler
81 l32i a0, a0, EXC_TABLE_FAST_USER # load handler
92 * jump to the first-level handler associated with the exception cause.
108 l32i a0, a0, EXC_TABLE_FAST_KERNEL # load handler address
134 * vmalloc memory, possibly requiring repair in a double exception handler.
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/linux/arch/arm/probes/kprobes/
H A Dactions-arm.c23 * setting a handler for it to run the instruction.
25 * In the execution phase by an instruction's handler:
31 * directly executed. Its handler calls the
298 [PROBES_PRELOAD_IMM] = {.handler = probes_simulate_nop},
299 [PROBES_PRELOAD_REG] = {.handler = probes_simulate_nop},
300 [PROBES_BRANCH_IMM] = {.handler = simulate_blx1},
301 [PROBES_MRS] = {.handler = simulate_mrs},
302 [PROBES_BRANCH_REG] = {.handler = simulate_blx2bx},
303 [PROBES_CLZ] = {.handler = emulate_rd12rm0_noflags_nopc},
305 .handler = emulate_rd12rn16rm0_rwflags_nopc},
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H A Dactions-thumb.c621 [PROBES_T16_ADD_SP] = {.handler = t16_simulate_add_sp_imm},
622 [PROBES_T16_CBZ] = {.handler = t16_simulate_cbz},
623 [PROBES_T16_SIGN_EXTEND] = {.handler = t16_emulate_loregs_rwflags},
626 [PROBES_T16_SEV] = {.handler = probes_emulate_none},
627 [PROBES_T16_WFE] = {.handler = probes_simulate_nop},
629 [PROBES_T16_CMP] = {.handler = t16_emulate_loregs_rwflags},
630 [PROBES_T16_ADDSUB] = {.handler = t16_emulate_loregs_noitrwflags},
631 [PROBES_T16_LOGICAL] = {.handler = t16_emulate_loregs_noitrwflags},
632 [PROBES_T16_LDR_LIT] = {.handler = t16_simulate_ldr_literal},
633 [PROBES_T16_BLX] = {.handler = t16_simulate_bxblx},
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/linux/drivers/s390/crypto/
H A Dpkey_base.c3 * pkey base: debug feature, pkey handler registry
30 * pkey handler registry
36 int pkey_handler_register(struct pkey_handler *handler) in pkey_handler_register() argument
40 if (!handler || in pkey_handler_register()
41 !handler->is_supported_key || in pkey_handler_register()
42 !handler->is_supported_keytype) in pkey_handler_register()
45 if (!try_module_get(handler->module)) in pkey_handler_register()
52 if (h == handler) { in pkey_handler_register()
55 module_put(handler->module); in pkey_handler_register()
61 list_add_rcu(&handler->list, &handler_list); in pkey_handler_register()
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/linux/tools/testing/selftests/signal/
H A Dmangle_uc_sigmask.c18 * that, in case of registering a handler and catching the corresponding
19 * signal, that state is before what was jumping into the handler.
22 * just during the execution of the handler, by mangling with uc_sigmask
23 * from inside the handler.
26 * signal for which the handler was installed, is S2. When S2 is sent to the
28 * signal and jump to the handler. Any instances of S1 or S2 raised, while the
29 * program is executing inside the handler, will be blocked; they will be
30 * delivered immediately upon termination of the handler.
54 * exit from handler in handler_verify_ucontext()
80 * from inside the handler in handler_usr()
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/linux/Documentation/arch/arm/
H A Dinterrupts.rst39 SA1111 IRQ handler, SA1111 IRQs can hold off SMC9196 IRQs indefinitely.
45 to the Neponset handler, the "parent" is GPIO25, and the "children"d
90 the hardware IRQ if possible. If not, may call the handler
104 - per-IRQ handler
107 The handler can be one of the 3 standard handlers - "level", "edge" and
108 "simple", or your own specific handler if you need to do something special.
110 The "level" handler is what we currently have - its pretty simple.
114 "simple" handler is very basic, and does not perform any hardware
131 set_irq_handler(irq,handler)
132 Set the handler for this IRQ (level, edge, simple)
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/linux/kernel/irq/
H A Ddevres.c34 irq_handler_t handler, irq_handler_t thread_fn, in devm_request_result() argument
41 irq, handler, thread_fn, devname ? : ""); in devm_request_result()
45 irq_handler_t handler, in __devm_request_threaded_irq() argument
61 rc = request_threaded_irq(irq, handler, thread_fn, irqflags, devname, in __devm_request_threaded_irq()
79 * @handler: Function to be called when the interrupt occurs
81 * for devices which handle everything in @handler
84 * @dev_id: A cookie passed back to the handler function
95 * information (device name, interrupt number, handler functions and
101 irq_handler_t handler, irq_handler_t thread_fn, in devm_request_threaded_irq() argument
105 int rc = __devm_request_threaded_irq(dev, irq, handler, thread_fn, in devm_request_threaded_irq()
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/linux/drivers/input/rmi4/
H A Drmi_bus.c150 const struct rmi_function_handler *handler = to_rmi_function_handler(drv); in rmi_function_match() local
153 return fn->fd.function_number == handler->func; in rmi_function_match()
176 struct rmi_function_handler *handler) in rmi_create_function_irq() argument
193 handler->attention, IRQF_ONESHOT, in rmi_create_function_irq()
207 struct rmi_function_handler *handler = in rmi_function_probe() local
213 if (handler->probe) { in rmi_function_probe()
214 error = handler->probe(fn); in rmi_function_probe()
219 if (fn->num_of_irqs && handler->attention) { in rmi_function_probe()
220 error = rmi_create_function_irq(fn, handler); in rmi_function_probe()
231 struct rmi_function_handler *handler = in rmi_function_remove() local
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/linux/Documentation/RCU/
H A DNMI-RCU.rst21 The dummy_nmi_callback() function is a "dummy" NMI handler that does
23 the NMI handler to take the default machine-specific action::
28 NMI handler::
47 count of NMIs. It then invokes the NMI handler stored in the nmi_callback
48 function pointer. If this handler returns zero, do_nmi() invokes the
70 The set_nmi_callback() function registers an NMI handler. Note that any
73 writes, the rcu_assign_pointer() ensures that the NMI handler sees the
81 This function unregisters an NMI handler, restoring the original
82 dummy_nmi_handler(). However, there may well be an NMI handler
84 up any data structures used by the old NMI handler until execution
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/linux/arch/um/include/shared/
H A Dirq_kern.h17 irq_handler_t handler, unsigned long irqflags,
22 * um_request_irq_tt - request an IRQ with timetravel handler
27 * @handler: the (generic style) IRQ handler
30 * @dev_id: data pointer to pass to the IRQ handler
31 * @timetravel_handler: the timetravel interrupt handler, invoked with the IRQ
36 * Note that the timetravel handler is invoked only if the time_travel_mode is
46 * it to pass such a message to the @handler in whichever way it can.
49 * not be invoked at all and the @handler must handle the FD becoming
56 irq_handler_t handler, unsigned long irqflags,
63 irq_handler_t handler, unsigned long irqflags, in um_request_irq_tt() argument
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/linux/kernel/trace/
H A Drethook.c46 * all running rethook handler before calling rethook_free(), you need to
51 rcu_assign_pointer(rh->handler, NULL); in rethook_stop()
59 * @rh::data is cleaned if needed (or, the handler can access it after
87 return (rethook_handler_t)rcu_dereference_check(rh->handler, in rethook_get_handler()
93 * @data: a data to pass the @handler when hooking the return.
94 * @handler: the return hook callback function, must NOT be NULL
98 * Allocate and initialize a new rethook with @data and @handler.
101 * Note that @handler == NULL means this rethook is going to be freed.
103 struct rethook *rethook_alloc(void *data, rethook_handler_t handler, in rethook_alloc() argument
108 if (!handler || num <= 0 || size < sizeof(struct rethook_node)) in rethook_alloc()
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/linux/fs/btrfs/
H A Dprops.c70 const struct prop_handler *handler; in btrfs_validate_prop() local
75 handler = find_prop_handler(name, NULL); in btrfs_validate_prop()
76 if (!handler) in btrfs_validate_prop()
82 return handler->validate(inode, value, value_len); in btrfs_validate_prop()
99 const struct prop_handler *handler; in btrfs_ignore_prop() local
101 handler = find_prop_handler(name, NULL); in btrfs_ignore_prop()
102 ASSERT(handler != NULL); in btrfs_ignore_prop()
104 return handler->ignore(inode); in btrfs_ignore_prop()
111 const struct prop_handler *handler; in btrfs_set_prop() local
114 handler = find_prop_handler(name, NULL); in btrfs_set_prop()
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/linux/Documentation/core-api/
H A Dgenericirq.rst29 __do_IRQ() super-handler, which is able to deal with every type of
33 a quite universal set for the ARM interrupt handler implementation in
46 In the SMP world of the __do_IRQ() super-handler another type was
58 the flow control in the super-handler. This leads to a mix of flow logic
74 Each interrupt descriptor is assigned its own high-level flow handler,
76 flow handler implementation also makes it simple to provide
86 of existing implementations, the __do_IRQ() super-handler is still
219 Default flow handler implementations
222 Default Level IRQ flow handler
235 Default Fast EOI IRQ flow handler
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/linux/drivers/firewire/
H A Dcore-transaction.c38 /* returns 0 if the split timeout handler is already running */
561 struct fw_address_handler *handler; in lookup_overlapping_address_handler() local
563 list_for_each_entry_rcu(handler, list, link) { in lookup_overlapping_address_handler()
564 if (handler->offset < offset + length && in lookup_overlapping_address_handler()
565 offset < handler->offset + handler->length) in lookup_overlapping_address_handler()
566 return handler; in lookup_overlapping_address_handler()
572 static bool is_enclosing_handler(struct fw_address_handler *handler, in is_enclosing_handler() argument
575 return handler->offset <= offset && in is_enclosing_handler()
576 offset + length <= handler->offset + handler->length; in is_enclosing_handler()
582 struct fw_address_handler *handler; in lookup_enclosing_address_handler() local
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