/* * Copyright (C) 2003-2008 Takahiro Hirofuchi * * This is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, * USA. */ #ifndef __USBIP_STUB_H #define __USBIP_STUB_H #include #include #include #include #include #include #define STUB_BUSID_OTHER 0 #define STUB_BUSID_REMOV 1 #define STUB_BUSID_ADDED 2 #define STUB_BUSID_ALLOC 3 struct stub_device { struct usb_device *udev; struct usbip_device ud; __u32 devid; /* * stub_priv preserves private data of each urb. * It is allocated as stub_priv_cache and assigned to urb->context. * * stub_priv is always linked to any one of 3 lists; * priv_init: linked to this until the comletion of a urb. * priv_tx : linked to this after the completion of a urb. * priv_free: linked to this after the sending of the result. * * Any of these list operations should be locked by priv_lock. */ spinlock_t priv_lock; struct list_head priv_init; struct list_head priv_tx; struct list_head priv_free; /* see comments for unlinking in stub_rx.c */ struct list_head unlink_tx; struct list_head unlink_free; wait_queue_head_t tx_waitq; }; /* private data into urb->priv */ struct stub_priv { unsigned long seqnum; struct list_head list; struct stub_device *sdev; struct urb *urb; int unlinking; }; struct stub_unlink { unsigned long seqnum; struct list_head list; __u32 status; }; /* same as SYSFS_BUS_ID_SIZE */ #define BUSID_SIZE 32 struct bus_id_priv { char name[BUSID_SIZE]; char status; int interf_count; struct stub_device *sdev; struct usb_device *udev; char shutdown_busid; }; /* stub_priv is allocated from stub_priv_cache */ extern struct kmem_cache *stub_priv_cache; /* stub_dev.c */ extern struct usb_device_driver stub_driver; /* stub_main.c */ struct bus_id_priv *get_busid_priv(const char *busid); int del_match_busid(char *busid); void stub_device_cleanup_urbs(struct stub_device *sdev); /* stub_rx.c */ int stub_rx_loop(void *data); /* stub_tx.c */ void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum, __u32 status); void stub_complete(struct urb *urb); int stub_tx_loop(void *data); #endif /* __USBIP_STUB_H */ ae7'>tools/perf/arch/arm/util
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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /tools/perf/arch/arm/util
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/arch/arm/util')