kernel/linux.git/drivers/char/Kconfig, branch v4.19.112

tty: mark Siemens R3964 line discipline as BROKEN

2019-04-17T06:38:47+00:00

commit c7084edc3f6d67750f50d4183134c4fb5712a5c8 upstream. The n_r3964 line discipline driver was written in a different time, when SMP machines were rare, and users were trusted to do the right thing. Since then, the world has moved on but not this code, it has stayed rooted in the past with its lovely hand-crafted list structures and loads of "interesting" race conditions all over the place. After attempting to clean up most of the issues, I just gave up and am now marking the driver as BROKEN so that hopefully someone who has this hardware will show up out of the woodwork (I know you are out there!) and will help with debugging a raft of changes that I had laying around for the code, but was too afraid to commit as odds are they would break things. Many thanks to Jann and Linus for pointing out the initial problems in this codebase, as well as many reviews of my attempts to fix the issues. It was a case of whack-a-mole, and as you can see, the mole won. Reported-by: Jann Horn Signed-off-by: Greg Kroah-Hartman Signed-off-by: Linus Torvalds

random: make CPU trust a boot parameter

2018-09-01T16:51:54+00:00

Instead of forcing a distro or other system builder to choose at build time whether the CPU is trusted for CRNG seeding via CONFIG_RANDOM_TRUST_CPU, provide a boot-time parameter for end users to control the choice. The CONFIG will set the default state instead. Signed-off-by: Kees Cook Signed-off-by: Theodore Ts'o

random: add a config option to trust the CPU's hwrng

2018-07-24T19:43:24+00:00

This gives the user building their own kernel (or a Linux distribution) the option of deciding whether or not to trust the CPU's hardware random number generator (e.g., RDRAND for x86 CPU's) as being correctly implemented and not having a back door introduced (perhaps courtesy of a Nation State's law enforcement or intelligence agencies). This will prevent getrandom(2) from blocking, if there is a willingness to trust the CPU manufacturer. Signed-off-by: Theodore Ts'o

docs: Fix some broken references

2018-06-15T21:10:01+00:00

As we move stuff around, some doc references are broken. Fix some of them via this script: ./scripts/documentation-file-ref-check --fix Manually checked if the produced result is valid, removing a few false-positives. Acked-by: Takashi Iwai Acked-by: Masami Hiramatsu Acked-by: Stephen Boyd Acked-by: Charles Keepax Acked-by: Mathieu Poirier Reviewed-by: Coly Li Signed-off-by: Mauro Carvalho Chehab Acked-by: Jonathan Corbet

char: sparc64: Add privileged ADI driver

2018-06-05T18:24:55+00:00

SPARC M7 and newer processors utilize ADI to version and protect memory. This driver is capable of reading/writing ADI/MCD versions from privileged user space processes. Addresses in the adi file are mapped linearly to physical memory at a ratio of 1:adi_blksz. Thus, a read (or write) of offset K in the file operates upon the ADI version at physical address K * adi_blksz. The version information is encoded as one version per byte. Intended consumers are makedumpfile and crash. Signed-off-by: Tom Hromatka Reviewed-by: Khalid Aziz Reviewed-by: Shannon Nelson Reviewed-by: Anthony Yznaga Reviewed-by: Greg Kroah-Hartman Signed-off-by: David S. Miller

Merge tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2018-04-05T03:07:20+00:00

Pull char/misc updates from Greg KH: "Here is the big set of char/misc driver patches for 4.17-rc1. There are a lot of little things in here, nothing huge, but all important to the different hardware types involved: - thunderbolt driver updates - parport updates (people still care...) - nvmem driver updates - mei updates (as always) - hwtracing driver updates - hyperv driver updates - extcon driver updates - ... and a handful of even smaller driver subsystem and individual driver updates All of these have been in linux-next with no reported issues" * tag 'char-misc-4.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (149 commits) hwtracing: Add HW tracing support menu intel_th: Add ACPI glue layer intel_th: Allow forcing host mode through drvdata intel_th: Pick up irq number from resources intel_th: Don't touch switch routing in host mode intel_th: Use correct method of finding hub intel_th: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate stm class: Make dummy's master/channel ranges configurable stm class: Add SPDX GPL-2.0 header to replace GPLv2 boilerplate MAINTAINERS: Bestow upon myself the care for drivers/hwtracing hv: add SPDX license id to Kconfig hv: add SPDX license to trace Drivers: hv: vmbus: do not mark HV_PCIE as perf_device Drivers: hv: vmbus: respect what we get from hv_get_synint_state() /dev/mem: Avoid overwriting "err" in read_mem() eeprom: at24: use SPDX identifier instead of GPL boiler-plate eeprom: at24: simplify the i2c functionality checking eeprom: at24: fix a line break eeprom: at24: tweak newlines eeprom: at24: refactor at24_probe() ...

char: remove blackfin OTP driver

2018-03-26T13:56:35+00:00

The blackfin architecture is getting removed, so we don't need this driver any more. Acked-by: Greg Kroah-Hartman Acked-by: Aaron Wu Signed-off-by: Arnd Bergmann

char: remove tile-srom.c

2018-03-26T13:56:34+00:00

The tile architecture is being removed, so we no longer need this driver. Acked-by: Greg Kroah-Hartman Signed-off-by: Arnd Bergmann

char: remove obsolete ds1302 rtc driver

2018-03-26T13:56:32+00:00

The m32r architecture was the only user of the old-style rtc driver for ds1302. The architecture is getting removed now, and we have a modern driver for the same hardware in drivers/rtc/rtc-ds1302.c, so this one won't be missed. Acked-by: Greg Kroah-Hartman Signed-off-by: Arnd Bergmann

char: nvram: disable on ARM

2018-03-15T17:01:42+00:00

/dev/nvram was never meant to be used alongside the RTC CMOS driver from drivers/rtc as it already expose the NVRAM through another interface.. Anyway, the last defconfig to enable it properly was removed in 2010 so prevent ARM users from selecting it. Signed-off-by: Alexandre Belloni Acked-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman