/* * 6LoWPAN Extension Header compression according to RFC7400 * * This program 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. */ #include "nhc.h" #define LOWPAN_GHC_EXT_FRAG_IDLEN 1 #define LOWPAN_GHC_EXT_FRAG_ID_0 0xb4 #define LOWPAN_GHC_EXT_FRAG_MASK_0 0xfe static void frag_ghid_setup(struct lowpan_nhc *nhc) { nhc->id[0] = LOWPAN_GHC_EXT_FRAG_ID_0; nhc->idmask[0] = LOWPAN_GHC_EXT_FRAG_MASK_0; } LOWPAN_NHC(ghc_ext_frag, "RFC7400 Fragmentation Extension Header", NEXTHDR_FRAGMENT, 0, frag_ghid_setup, LOWPAN_GHC_EXT_FRAG_IDLEN, NULL, NULL); module_lowpan_nhc(ghc_ext_frag); MODULE_DESCRIPTION("6LoWPAN generic header fragmentation extension compression"); MODULE_LICENSE("GPL"); t.git
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authorMarc Zyngier <marc.zyngier@arm.com>2017-01-17 16:00:48 +0000
committerThomas Gleixner <tglx@linutronix.de>2017-01-30 15:18:56 +0100
commit08d85f3ea99f1eeafc4e8507936190e86a16ee8c (patch)
tree410bb1acd0cd7dcfaad37ae7b63ff243b7fa4bee /tools/perf/bench/futex.h
parent566cf877a1fcb6d6dc0126b076aad062054c2637 (diff)
irqdomain: Avoid activating interrupts more than once
Since commit f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early"), we can end-up activating a PCI/MSI twice (once at allocation time, and once at startup time). This is normally of no consequences, except that there is some HW out there that may misbehave if activate is used more than once (the GICv3 ITS, for example, uses the activate callback to issue the MAPVI command, and the architecture spec says that "If there is an existing mapping for the EventID-DeviceID combination, behavior is UNPREDICTABLE"). While this could be worked around in each individual driver, it may make more sense to tackle the issue at the core level. In order to avoid getting in that situation, let's have a per-interrupt flag to remember if we have already activated that interrupt or not. Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early") Reported-and-tested-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/1484668848-24361-1-git-send-email-marc.zyngier@arm.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'tools/perf/bench/futex.h')