config MAC802154
tristate "Generic IEEE 802.15.4 Soft Networking Stack (mac802154)"
depends on IEEE802154
select CRC_CCITT
select CRYPTO
select CRYPTO_AUTHENC
select CRYPTO_CCM
select CRYPTO_CTR
select CRYPTO_AES
---help---
This option enables the hardware independent IEEE 802.15.4
networking stack for SoftMAC devices (the ones implementing
only PHY level of IEEE 802.15.4 standard).
Note: this implementation is neither certified, nor feature
complete! Compatibility with other implementations hasn't
been tested yet!
If you plan to use HardMAC IEEE 802.15.4 devices, you can
say N here. Alternatively you can say M to compile it as
module.
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index : net-next.git | |
| net-next plumbings | Tobias Klauser |
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>