Mike Snitzer b277da0a8a block: disable entropy contributions for nonrot devices ... Clear QUEUE_FLAG_ADD_RANDOM in all block drivers that set QUEUE_FLAG_NONROT. Historically, all block devices have automatically made entropy contributions. But as previously stated in commit e2e1a148 ("block: add sysfs knob for turning off disk entropy contributions"): - On SSD disks, the completion times aren't as random as they are for rotational drives. So it's questionable whether they should contribute to the random pool in the first place. - Calling add_disk_randomness() has a lot of overhead. There are more reliable sources for randomness than non-rotational block devices. From a security perspective it is better to err on the side of caution than to allow entropy contributions from unreliable "random" sources. Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>		2014-10-04 10:55:32 -06:00
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block.c	mmc: Do not advertise secure discard if it is blacklisted	2014-07-26 11:13:39 +02:00
Kconfig	tty: Added a CONFIG_TTY option to allow removal of TTY	2013-01-18 16:15:27 -08:00
Makefile	mmc: Makefile: Fix EXTRA_CFLAGS assignment	2010-10-23 21:11:15 +08:00
mmc_test.c	mmc: mmc_test: replace strict_strtol() with kstrtol_from_user()	2013-08-24 23:19:05 -04:00
queue.c	block: disable entropy contributions for nonrot devices	2014-10-04 10:55:32 -06:00
queue.h	mmc: block: fix the host's claim-release in special request	2013-03-22 13:29:36 -04:00
sdio_uart.c	TTY: add tty_port_tty_hangup helper	2013-03-18 16:24:29 -07:00