/* * rcar-fcp.h -- R-Car Frame Compression Processor Driver * * Copyright (C) 2016 Renesas Electronics Corporation * * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) * * 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. */ #ifndef __MEDIA_RCAR_FCP_H__ #define __MEDIA_RCAR_FCP_H__ struct device_node; struct rcar_fcp_device; #if IS_ENABLED(CONFIG_VIDEO_RENESAS_FCP) struct rcar_fcp_device *rcar_fcp_get(const struct device_node *np); void rcar_fcp_put(struct rcar_fcp_device *fcp); int rcar_fcp_enable(struct rcar_fcp_device *fcp); void rcar_fcp_disable(struct rcar_fcp_device *fcp); #else static inline struct rcar_fcp_device *rcar_fcp_get(const struct device_node *np) { return ERR_PTR(-ENOENT); } static inline void rcar_fcp_put(struct rcar_fcp_device *fcp) { } static inline int rcar_fcp_enable(struct rcar_fcp_device *fcp) { return 0; } static inline void rcar_fcp_disable(struct rcar_fcp_device *fcp) { } #endif #endif /* __MEDIA_RCAR_FCP_H__ */ n> net-next plumbingsTobias Klauser
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /tools/perf/Documentation/perf-mem.txt
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'tools/perf/Documentation/perf-mem.txt')