#include #include #include #include #include #include int xen_event_channel_op_compat(int cmd, void *arg) { struct evtchn_op op; int rc; op.cmd = cmd; memcpy(&op.u, arg, sizeof(op.u)); rc = _hypercall1(int, event_channel_op_compat, &op); switch (cmd) { case EVTCHNOP_close: case EVTCHNOP_send: case EVTCHNOP_bind_vcpu: case EVTCHNOP_unmask: /* no output */ break; #define COPY_BACK(eop) \ case EVTCHNOP_##eop: \ memcpy(arg, &op.u.eop, sizeof(op.u.eop)); \ break COPY_BACK(bind_interdomain); COPY_BACK(bind_virq); COPY_BACK(bind_pirq); COPY_BACK(status); COPY_BACK(alloc_unbound); COPY_BACK(bind_ipi); #undef COPY_BACK default: WARN_ON(rc != -ENOSYS); break; } return rc; } EXPORT_SYMBOL_GPL(xen_event_channel_op_compat); int xen_physdev_op_compat(int cmd, void *arg) { struct physdev_op op; int rc; op.cmd = cmd; memcpy(&op.u, arg, sizeof(op.u)); rc = _hypercall1(int, physdev_op_compat, &op); switch (cmd) { case PHYSDEVOP_IRQ_UNMASK_NOTIFY: case PHYSDEVOP_set_iopl: case PHYSDEVOP_set_iobitmap: case PHYSDEVOP_apic_write: /* no output */ break; #define COPY_BACK(pop, fld) \ case PHYSDEVOP_##pop: \ memcpy(arg, &op.u.fld, sizeof(op.u.fld)); \ break COPY_BACK(irq_status_query, irq_status_query); COPY_BACK(apic_read, apic_op); COPY_BACK(ASSIGN_VECTOR, irq_op); #undef COPY_BACK default: WARN_ON(rc != -ENOSYS); break; } return rc; } EXPORT_SYMBOL_GPL(xen_physdev_op_compat); xt.git/'>summaryrefslogtreecommitdiff
path: root/fs/autofs4/expire.c
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /fs/autofs4/expire.c
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'fs/autofs4/expire.c')