/* * AD1936/AD1937 audio driver * * Copyright 2014 Analog Devices Inc. * * Licensed under the GPL-2. */ #include #include #include #include #include "ad193x.h" static const struct i2c_device_id ad193x_id[] = { { "ad1936", AD193X }, { "ad1937", AD193X }, { } }; MODULE_DEVICE_TABLE(i2c, ad193x_id); static int ad193x_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct regmap_config config; config = ad193x_regmap_config; config.val_bits = 8; config.reg_bits = 8; return ad193x_probe(&client->dev, devm_regmap_init_i2c(client, &config), (enum ad193x_type)id->driver_data); } static int ad193x_i2c_remove(struct i2c_client *client) { snd_soc_unregister_codec(&client->dev); return 0; } static struct i2c_driver ad193x_i2c_driver = { .driver = { .name = "ad193x", }, .probe = ad193x_i2c_probe, .remove = ad193x_i2c_remove, .id_table = ad193x_id, }; module_i2c_driver(ad193x_i2c_driver); MODULE_DESCRIPTION("ASoC AD1936/AD1937 audio CODEC driver"); MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>"); MODULE_LICENSE("GPL"); net-next plumbingsTobias Klauser
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authorNicholas Piggin <npiggin@gmail.com>2016-12-25 13:00:30 +1000
committerLinus Torvalds <torvalds@linux-foundation.org>2016-12-25 11:54:48 -0800
commit62906027091f1d02de44041524f0769f60bb9cf3 (patch)
tree6444171af03e463bb0123a392d7b91a0ae6a1f40 /tools/perf/pmu-events/arch/x86/westmereep-sp/virtual-memory.json
parent6326fec1122cde256bd2a8c63f2606e08e44ce1d (diff)
mm: add PageWaiters indicating tasks are waiting for a page bit
Add a new page flag, PageWaiters, to indicate the page waitqueue has tasks waiting. This can be tested rather than testing waitqueue_active which requires another cacheline load. This bit is always set when the page has tasks on page_waitqueue(page), and is set and cleared under the waitqueue lock. It may be set when there are no tasks on the waitqueue, which will cause a harmless extra wakeup check that will clears the bit. The generic bit-waitqueue infrastructure is no longer used for pages. Instead, waitqueues are used directly with a custom key type. The generic code was not flexible enough to have PageWaiters manipulation under the waitqueue lock (which simplifies concurrency). This improves the performance of page lock intensive microbenchmarks by 2-3%. Putting two bits in the same word opens the opportunity to remove the memory barrier between clearing the lock bit and testing the waiters bit, after some work on the arch primitives (e.g., ensuring memory operand widths match and cover both bits). Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Bob Peterson <rpeterso@redhat.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Andrew Lutomirski <luto@kernel.org> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mel Gorman <mgorman@techsingularity.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/perf/pmu-events/arch/x86/westmereep-sp/virtual-memory.json')