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  1. 03 7月, 2017 4 次提交
  3. 06 6月, 2017 11 次提交
  5. 05 6月, 2017 2 次提交
  7. 19 5月, 2017 9 次提交
  9. 09 5月, 2017 1 次提交
  11. 29 4月, 2017 2 次提交
  13. 20 4月, 2017 1 次提交
    • D
      Annotate hardware config module parameters in drivers/watchdog/ · 5d1c93ce
      由 David Howells 提交于 
      When the kernel is running in secure boot mode, we lock down the kernel to
prevent userspace from modifying the running kernel image.  Whilst this
includes prohibiting access to things like /dev/mem, it must also prevent
access by means of configuring driver modules in such a way as to cause a
device to access or modify the kernel image.

To this end, annotate module_param* statements that refer to hardware
configuration and indicate for future reference what type of parameter they
specify.  The parameter parser in the core sees this information and can
skip such parameters with an error message if the kernel is locked down.
The module initialisation then runs as normal, but just sees whatever the
default values for those parameters is.

Note that we do still need to do the module initialisation because some
drivers have viable defaults set in case parameters aren't specified and
some drivers support automatic configuration (e.g. PNP or PCI) in addition
to manually coded parameters.

This patch annotates drivers in drivers/watchdog/.
Suggested-by: NAlan Cox <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Reviewed-by: NGuenter Roeck <linux@roeck-us.net>
cc: Wim Van Sebroeck <wim@iguana.be>
cc: Zwane Mwaikambo <zwanem@gmail.com>
cc: linux-watchdog@vger.kernel.org
      5d1c93ce
  15. 01 3月, 2017 10 次提交
    • A
      watchdog: retu: restore MFD dependency · 9ad82f11
      由 Arnd Bergmann 提交于 
      The retu watchdog calls into the respective mfd driver, but fails to
link if that is diabled:

drivers/watchdog/built-in.o: In function `retu_wdt_set_timeout':
ziirave_wdt.c:(.text+0x8c88): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8c88): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
drivers/watchdog/built-in.o: In function `retu_wdt_start':
ziirave_wdt.c:(.text+0x8cc8): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8cc8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'

This restores the dependency as it was before

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      9ad82f11
    • A
      watchdog: db8500: add back prmcu dependency · 9297b652
      由 Arnd Bergmann 提交于 
      When the db8500 watchdog is enabled without the PRCMU, we get a lot of
warnings about duplicate or missing helper functions:

In file included from drivers/watchdog/ux500_wdt.c:21:0:
include/linux/mfd/dbx500-prcmu.h:422:19: error: redefinition of 'prcmu_abb_read'
 static inline int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)

This restores the dependency as it was.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      9297b652
    • A
      watchdog: kempld: fix gcc-4.3 build · 3736d4eb
      由 Arnd Bergmann 提交于 
      gcc-4.3 can't decide whether the constant value in
kempld_prescaler[PRESCALER_21] is built-time constant or
not, and gets confused by the logic in do_div():

drivers/watchdog/kempld_wdt.o: In function `kempld_wdt_set_stage_timeout':
kempld_wdt.c:(.text.kempld_wdt_set_stage_timeout+0x130): undefined reference to `__aeabi_uldivmod'

This adds a call to ACCESS_ONCE() to force it to not consider
it to be constant, and leaves the more efficient normal case
in place for modern compilers, using an #ifdef to annotate
why we do this hack.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      3736d4eb
    • N
      watchdog: softdog: fire watchdog even if softirqs do not get to run · 8d5755b3
      由 Niklas Cassel 提交于 
      Checking for timer expiration is done from the softirq TIMER_SOFTIRQ.

Since commit 4cd13c21 ("softirq: Let ksoftirqd do its job"),
pending softirqs are no longer always handled immediately, instead,
if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING,
the handling of the softirqs are deferred, and are instead supposed
to be handled by ksoftirqd, when ksoftirqd gets scheduled.

If a user space process with a real-time policy starts to misbehave
by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING,
what will happen is that all softirqs will get deferred, while ksoftirqd,
which is supposed to handle the deferred softirqs, will never get to run.

To make sure that the watchdog is able to fire even when we do not get
to run softirqs, replace the timers with hrtimers.
Signed-off-by: NNiklas Cassel <niklas.cassel@axis.com>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      8d5755b3
    • A
      watchdog: kempld: revert to full dependency · ed4a9eca
      由 Arnd Bergmann 提交于 
      The kempld watchdog driver requires the respective MFD driver:

drivers/watchdog/built-in.o: In function `kempld_wdt_probe':
kempld_wdt.c:(.text+0x5c78): undefined reference to `kempld_get_mutex'
kempld_wdt.c:(.text+0x5c84): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5c8e): undefined reference to `kempld_release_mutex'
kempld_wdt.c:(.text+0x5d1c): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5d2c): undefined reference to `kempld_write8'

This adds the Kconfig dependency back.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      ed4a9eca
    • A
      watchdog: bcm2835: add CONFIG_OF dependency · 2672b7e0
      由 Arnd Bergmann 提交于 
      Without CONFIG_OF, the driver fails to link:

drivers/watchdog/built-in.o: In function `bcm2835_power_off':
bcm2835_wdt.c:(.text+0x1946): undefined reference to `of_find_device_by_node'

This adds a new dependency, to allow the COMPILE_TEST check to succeed.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      2672b7e0
    • A
      watchdog: sp805: add back AMBA dependency · 3eafee95
      由 Arnd Bergmann 提交于 
      The driver fails to link if ARM_AMBA is disabled:

drivers/watchdog/sp805_wdt.o: In function `sp805_wdt_driver_init':
sp805_wdt.c:(.init.text+0x4): undefined reference to `amba_driver_register'

It seems that the COMPILE_TEST was added in the wrong place, as there
is no architecture dependency, but a bus dependency. This moves
the dependency accordingly.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      3eafee95
    • A
      watchdog: menf21bmc: add I2C dependency · 6fb303a8
      由 Arnd Bergmann 提交于 
      This driver fails to link when CONFIG_I2C is disabled or a loadable module while
the watchdog is built-in:

drivers/watchdog/built-in.o: In function `menf21bmc_wdt_shutdown':
menf21bmc_wdt.c:(.text+0x9b44): undefined reference to `i2c_smbus_write_word_data'
menf21bmc_wdt.c:(.text+0x9b44): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `i2c_smbus_write_word_data'

This adds a Kconfig dependency for it, to enforce a valid configuration.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      6fb303a8
    • A
      watchdog: geode: restore hard CS5535_MFGPT dependency · 0369fdf2
      由 Arnd Bergmann 提交于 
      Wtihout CONFIG_CS5535_MFGPT, the driver does not link right:

drivers/watchdog/built-in.o: In function `geodewdt_probe':
geodewdt.c:(.init.text+0xca3): undefined reference to `cs5535_mfgpt_alloc_timer'
geodewdt.c:(.init.text+0xcd4): undefined reference to `cs5535_mfgpt_write'
geodewdt.c:(.init.text+0xcef): undefined reference to `cs5535_mfgpt_toggle_event'

This adds back the dependency on this base driver.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      0369fdf2
    • A
      watchdog: wm831x watchdog really needs mfd · d0e32fba
      由 Arnd Bergmann 提交于 
      The wm831x watchdog driver can now be built without the wm831x mfd
driver, which results in a link error:

(.text+0x1a95c): undefined reference to `wm831x_set_bits'
(.text+0x1a95c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_set_bits'
(.text+0x1a968): undefined reference to `wm831x_reg_lock'
(.text+0x1a968): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_lock'
(.text+0x1a9dc): undefined reference to `wm831x_reg_unlock'
(.text+0x1a9dc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_unlock'

This adds back the dependency that was removed. We can still build test
this driver on all architectures by enabling the MFD driver for it first.

Fixes: da2a68b3 ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NGuenter Roeck <linux@roeck-us.net>
      d0e32fba