Theodore Ts'o ee3e00e9e7 random: use registers from interrupted code for CPU's w/o a cycle counter ... For CPU's that don't have a cycle counter, or something equivalent which can be used for random_get_entropy(), random_get_entropy() will always return 0. In that case, substitute with the saved interrupt registers to add a bit more unpredictability. Some folks have suggested hashing all of the registers unconditionally, but this would increase the overhead of add_interrupt_randomness() by at least an order of magnitude, and this would very likely be unacceptable. The changes in this commit have been benchmarked as mostly unaffecting the overhead of add_interrupt_randomness() if the entropy counter is present, and doubling the overhead if it is not present. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: Jörn Engel <joern@logfs.org>		2014-07-15 04:49:41 -04:00
..
agp	agp: info leak in agpioc_info_wrap()	2014-05-06 13:05:00 -07:00
hw_random	hwrng: add per-device entropy derating	2014-07-15 04:49:40 -04:00
ipmi	Merge branch 'sched/urgent' into sched/core, to avoid conflicts	2014-05-07 13:15:46 +02:00
mwave	drivers/char: delete non-required instances of include <linux/init.h>	2014-02-07 15:10:19 -08:00
pcmcia	tty: Fix help text of SYNCLINK_CS	2014-04-16 14:31:13 -07:00
tpm	Merge branch 'acpica'	2014-06-03 23:12:27 +02:00
xilinx_hwicap	char: hwicap: Remove unnecessary dev_set_drvdata()	2013-10-03 16:03:31 -07:00
apm-emulation.c	apm-emulation: add hibernation APM events to support suspend2disk	2014-01-07 13:50:28 +01:00
applicom.c	applicom: dereferencing NULL on error path	2014-05-27 17:43:12 -07:00
applicom.h
bfin-otp.c
bsr.c	drivers: clean-up prom.h implicit includes	2013-10-09 20:04:04 -05:00
ds1302.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
ds1620.c	ds1620: single_open() leak	2013-05-05 00:11:29 -04:00
dsp56k.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
dtlk.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
efirtc.c	rtc: single_open() leaks	2013-05-05 00:12:29 -04:00
generic_nvram.c
genrtc.c	rtc: single_open() leaks	2013-05-05 00:12:29 -04:00
hangcheck-timer.c
hpet.c	ACPI: Clean up inclusions of ACPI header files	2013-12-07 01:03:14 +01:00
i8k.c	i8k: Fix non-SMP operation	2014-07-09 16:45:36 -07:00
Kconfig	ttyprintk: Allow built as a module	2014-04-16 14:21:06 -07:00
lp.c	char: Int overflow in lp_do_ioctl().	2013-12-18 16:39:54 -08:00
Makefile	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-01-29 20:49:12 -08:00
mbcs.c	char: remove use of __devinitconst	2012-11-21 12:55:19 -08:00
mbcs.h
mem.c	/dev/mem: handle out-of-bounds read/write	2014-02-15 11:51:02 -08:00
misc.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-11-13 15:34:18 +09:00
mmtimer.c	drivers/char/mmtimer.c: Remove useless kfree	2012-09-26 13:20:40 -07:00
msm_smd_pkt.c	treewide: Fix typos in printk	2013-12-19 15:10:49 +01:00
mspec.c	char: Use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT	2013-05-21 10:07:54 -07:00
nsc_gpio.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
nvram.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
nwbutton.c	char: nwbutton: open-code interruptible_sleep_on	2014-01-08 15:29:52 -08:00
nwbutton.h
nwflash.c	Merge branch 'late/fixes' into fixes	2012-10-07 07:22:32 -07:00
pc8736x_gpio.c	pc8736x_gpio: use platform_device_unregister in pc8736x_gpio_cleanup()	2012-10-24 15:52:29 -07:00
ppdev.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
ps3flash.c	ps3flash: switch to generic_file_llseek_size()	2013-06-29 12:57:33 +04:00
random.c	random: use registers from interrupted code for CPU's w/o a cycle counter	2014-07-15 04:49:41 -04:00
raw.c	blkdev_aio_write() - turn into blkdev_write_iter()	2014-05-06 17:38:01 -04:00
rtc.c	various char drivers: remove deprecated IRQF_DISABLED	2013-10-16 12:36:10 -07:00
scx200_gpio.c
snsc_event.c	various char drivers: remove deprecated IRQF_DISABLED	2013-10-16 12:36:10 -07:00
snsc.c	various char drivers: remove deprecated IRQF_DISABLED	2013-10-16 12:36:10 -07:00
snsc.h
sonypi.c	ACPI: Remove the old /proc/acpi/event interface	2013-07-15 13:56:36 +02:00
tb0219.c	new helper: file_inode(file)	2013-02-22 23:31:31 -05:00
tile-srom.c	drivers/char: delete non-required instances of include <linux/init.h>	2014-02-07 15:10:19 -08:00
tlclk.c	tlclk: remove deprecated IRQF_DISABLED	2013-10-16 12:36:10 -07:00
toshiba.c
ttyprintk.c	ttyprintk: Allow built as a module	2014-04-16 14:21:06 -07:00
uv_mmtimer.c
virtio_console.c	pipe: kill ->map() and ->unmap()	2014-04-01 23:19:19 -04:00