#ifndef _RDMA_NETLINK_H #define _RDMA_NETLINK_H #include #include struct ibnl_client_cbs { int (*dump)(struct sk_buff *skb, struct netlink_callback *nlcb); struct module *module; }; int ibnl_init(void); void ibnl_cleanup(void); /** * Add a a client to the list of IB netlink exporters. * @index: Index of the added client * @nops: Number of supported ops by the added client. * @cb_table: A table for op->callback * * Returns 0 on success or a negative error code. */ int ibnl_add_client(int index, int nops, const struct ibnl_client_cbs cb_table[]); /** * Remove a client from IB netlink. * @index: Index of the removed IB client. * * Returns 0 on success or a negative error code. */ int ibnl_remove_client(int index); /** * Put a new message in a supplied skb. * @skb: The netlink skb. * @nlh: Pointer to put the header of the new netlink message. * @seq: The message sequence number. * @len: The requested message length to allocate. * @client: Calling IB netlink client. * @op: message content op. * Returns the allocated buffer on success and NULL on failure. */ void *ibnl_put_msg(struct sk_buff *skb, struct nlmsghdr **nlh, int seq, int len, int client, int op, int flags); /** * Put a new attribute in a supplied skb. * @skb: The netlink skb. * @nlh: Header of the netlink message to append the attribute to. * @len: The length of the attribute data. * @data: The attribute data to put. * @type: The attribute type. * Returns the 0 and a negative error code on failure. */ int ibnl_put_attr(struct sk_buff *skb, struct nlmsghdr *nlh, int len, void *data, int type); /** * Send the supplied skb to a specific userspace PID. * @skb: The netlink skb * @nlh: Header of the netlink message to send * @pid: Userspace netlink process ID * Returns 0 on success or a negative error code. */ int ibnl_unicast(struct sk_buff *skb, struct nlmsghdr *nlh, __u32 pid); /** * Send the supplied skb to a netlink group. * @skb: The netlink skb * @nlh: Header of the netlink message to send * @group: Netlink group ID * @flags: allocation flags * Returns 0 on success or a negative error code. */ int ibnl_multicast(struct sk_buff *skb, struct nlmsghdr *nlh, unsigned int group, gfp_t flags); /** * Check if there are any listeners to the netlink group * @group: the netlink group ID * Returns 0 on success or a negative for no listeners. */ int ibnl_chk_listeners(unsigned int group); #endif /* _RDMA_NETLINK_H */ n' name='id' value='0becc0ae5b42828785b589f686725ff5bc3b9b25'/>
path: root/kernel/trace/trace_events.c
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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 /kernel/trace/trace_events.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 'kernel/trace/trace_events.c')