# # PPS support configuration # menu "PPS support" config PPS tristate "PPS support" ---help--- PPS (Pulse Per Second) is a special pulse provided by some GPS antennae. Userland can use it to get a high-precision time reference. Some antennae's PPS signals are connected with the CD (Carrier Detect) pin of the serial line they use to communicate with the host. In this case use the SERIAL_LINE client support. Some antennae's PPS signals are connected with some special host inputs so you have to enable the corresponding client support. To compile this driver as a module, choose M here: the module will be called pps_core.ko. if PPS config PPS_DEBUG bool "PPS debugging messages" help Say Y here if you want the PPS support to produce a bunch of debug messages to the system log. Select this if you are having a problem with PPS support and want to see more of what is going on. config NTP_PPS bool "PPS kernel consumer support" depends on !NO_HZ help This option adds support for direct in-kernel time synchronization using an external PPS signal. It doesn't work on tickless systems at the moment. endif source drivers/pps/clients/Kconfig source drivers/pps/generators/Kconfig endmenu 'selected'>nds-private-remove net-next plumbingsTobias Klauser
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authorDexuan Cui <decui@microsoft.com>2017-01-28 11:46:02 -0700
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-01-31 10:59:48 +0100
commit433e19cf33d34bb6751c874a9c00980552fe508c (patch)
treece6547ef2987fbb289fa28f03536328a42781651 /drivers/usb/phy/phy-ab8500-usb.c
parent191e885a2e130e639bb0c8ee350d7047294f2ce6 (diff)
Drivers: hv: vmbus: finally fix hv_need_to_signal_on_read()
Commit a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") added the proper mb(), but removed the test "prev_write_sz < pending_sz" when making the signal decision. As a result, the guest can signal the host unnecessarily, and then the host can throttle the guest because the host thinks the guest is buggy or malicious; finally the user running stress test can perceive intermittent freeze of the guest. This patch brings back the test, and properly handles the in-place consumption APIs used by NetVSC (see get_next_pkt_raw(), put_pkt_raw() and commit_rd_index()). Fixes: a389fcfd2cb5 ("Drivers: hv: vmbus: Fix signaling logic in hv_need_to_signal_on_read()") Signed-off-by: Dexuan Cui <decui@microsoft.com> Reported-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Tested-by: Rolf Neugebauer <rolf.neugebauer@docker.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: <stable@vger.kernel.org> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/phy/phy-ab8500-usb.c')