/* * Copyright (C) 2015, He Kuang * Copyright (C) 2015, Huawei Inc. */ #ifndef __BPF_PROLOGUE_H #define __BPF_PROLOGUE_H #include #include #include "probe-event.h" #define BPF_PROLOGUE_MAX_ARGS 3 #define BPF_PROLOGUE_START_ARG_REG BPF_REG_3 #define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2 #ifdef HAVE_BPF_PROLOGUE int bpf__gen_prologue(struct probe_trace_arg *args, int nargs, struct bpf_insn *new_prog, size_t *new_cnt, size_t cnt_space); #else static inline int bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused, int nargs __maybe_unused, struct bpf_insn *new_prog __maybe_unused, size_t *new_cnt, size_t cnt_space __maybe_unused) { if (!new_cnt) return -EINVAL; *new_cnt = 0; return -ENOTSUP; } #endif #endif /* __BPF_PROLOGUE_H */ m'>
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 /net/mac80211/chan.c
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 'net/mac80211/chan.c')