/* * V4L2 clock service * * Copyright (C) 2012-2013, Guennadi Liakhovetski * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * ATTENTION: This is a temporary API and it shall be replaced by the generic * clock API, when the latter becomes widely available. */ #ifndef MEDIA_V4L2_CLK_H #define MEDIA_V4L2_CLK_H #include #include #include #include struct module; struct device; struct clk; struct v4l2_clk { struct list_head list; const struct v4l2_clk_ops *ops; const char *dev_id; int enable; struct mutex lock; /* Protect the enable count */ atomic_t use_count; struct clk *clk; void *priv; }; struct v4l2_clk_ops { struct module *owner; int (*enable)(struct v4l2_clk *clk); void (*disable)(struct v4l2_clk *clk); unsigned long (*get_rate)(struct v4l2_clk *clk); int (*set_rate)(struct v4l2_clk *clk, unsigned long); }; struct v4l2_clk *v4l2_clk_register(const struct v4l2_clk_ops *ops, const char *dev_name, void *priv); void v4l2_clk_unregister(struct v4l2_clk *clk); struct v4l2_clk *v4l2_clk_get(struct device *dev, const char *id); void v4l2_clk_put(struct v4l2_clk *clk); int v4l2_clk_enable(struct v4l2_clk *clk); void v4l2_clk_disable(struct v4l2_clk *clk); unsigned long v4l2_clk_get_rate(struct v4l2_clk *clk); int v4l2_clk_set_rate(struct v4l2_clk *clk, unsigned long rate); struct module; struct v4l2_clk *__v4l2_clk_register_fixed(const char *dev_id, unsigned long rate, struct module *owner); void v4l2_clk_unregister_fixed(struct v4l2_clk *clk); static inline struct v4l2_clk *v4l2_clk_register_fixed(const char *dev_id, unsigned long rate) { return __v4l2_clk_register_fixed(dev_id, rate, THIS_MODULE); } #define V4L2_CLK_NAME_SIZE 64 #define v4l2_clk_name_i2c(name, size, adap, client) snprintf(name, size, \ "%d-%04x", adap, client) #define v4l2_clk_name_of(name, size, of_full_name) snprintf(name, size, \ "of-%s", of_full_name) #endif b6cae7'>commitdiff
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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/testing/selftests/lib.mk
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/testing/selftests/lib.mk')