Clean up: The garbage_args and cant_encode tracepoints report the
same information as each other, so combine them into a single
tracepoint class to reduce code duplication and slightly reduce the
size of trace.o.
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Three fixes for the 5.16 cycle:
1. Avoid going beyond last capacity in the power-supply core
2. Replace 1E6L with NSEC_PER_MSEC to avoid floating point calculation
in LLVM resulting in a build failure
3. Fix ADC measurements in bq25890 charger driver
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Merge tag 'for-v5.16-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply
Pull power supply fixes from Sebastian Reichel:
"Three fixes for the 5.16 cycle:
- Avoid going beyond last capacity in the power-supply core
- Replace 1E6L with NSEC_PER_MSEC to avoid floating point calculation
in LLVM resulting in a build failure
- Fix ADC measurements in bq25890 charger driver"
* tag 'for-v5.16-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
power: reset: ltc2952: Fix use of floating point literals
power: bq25890: Enable continuous conversion for ADC at charging
power: supply: core: Break capacity loop
Most flexcan IP cores support 2 RX modes:
- FIFO
- mailbox
Some IP core versions cannot receive CAN RTR messages via mailboxes.
This patch adds quirks to document this.
This information will be used in a later patch to switch from FIFO to
more performant mailbox mode at the expense of losing the ability to
receive RTR messages. This trade off is beneficial in certain use
cases.
Link: https://lore.kernel.org/all/20220107193105.1699523-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Most flexcan IP cores support 2 RX modes:
- FIFO
- mailbox
The names for these modes were chosen to reflect the name of the
rx-offload mode they are using.
The name of the RX modes should better reflect their difference with
regards the flexcan IP core. So this patch renames the various
occurrences of OFF_FIFO to RX_FIFO and OFF_TIMESTAMP to RX_MAILBOX:
| FLEXCAN_TX_MB_RESERVED_OFF_FIFO -> FLEXCAN_TX_MB_RESERVED_RX_FIFO
| FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP -> FLEXCAN_TX_MB_RESERVED_RX_MAILBOX
| FLEXCAN_QUIRK_USE_OFF_TIMESTAMP -> FLEXCAN_QUIRK_USE_RX_MAILBOX
Link: https://lore.kernel.org/all/20220107193105.1699523-4-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This is a preparation patch for the upcoming support to change the
rx-rtr capability via the ethtool API.
Link: https://lore.kernel.org/all/20220107193105.1699523-3-mkl@pengutronix.de
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The .c files in the Makefile are ordered alphabetically. This patch
groups the function prototypes by their corresponding .c file and
brings the into the same order.
Link: https://lore.kernel.org/all/20220105154300.1258636-8-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
A RX overflow usually happens during high system load. Printing
overflow messages to the kernel log, which on embedded systems often
is outputted on the serial console, even increases the system load.
To decrease the system load in these situations, denote the messages
to debug level and wrap them with net_ratelimit().
Link: https://lore.kernel.org/all/20220105154300.1258636-7-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
With patch
| dd8088d5a8 PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter
the usual pm_runtime_get_sync() and pm_runtime_put_noidle()
in-case-of-error dance is no longer needed. Convert the mcp251xfd
driver to use this function.
Link: https://lore.kernel.org/all/20220105154300.1258636-6-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch exchanges the order of open_candev() and
pm_runtime_get_sync(), so that open_candev() is called first.
A usual reason why open_candev() fails is missing CAN bit rate
configuration. It makes no sense to resume the device from PM sleep
first just to put it to sleep if the bit rate is not configured.
Link: https://lore.kernel.org/all/20220105154300.1258636-5-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Clang static analysis reports this problem
janz-ican3.c:1311:2: warning: Undefined or garbage value returned to caller
return dlc;
^~~~~~~~~~
dlc is only set with this conditional
if (!(cf->can_id & CAN_RTR_FLAG))
dlc = cf->len;
But is always returned. So initialize dlc to 0.
Fixes: cc4b08c31b ("can: do not increase tx_bytes statistics for RTR frames")
Link: https://lore.kernel.org/all/20220108143319.3986923-1-trix@redhat.com
Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
- Make the old ALLOCSP ioctl behave in a consistent manner with
newer syscalls like fallocate.
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Merge tag 'xfs-5.16-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fix from Darrick Wong:
- Make the old ALLOCSP ioctl behave in a consistent manner with newer
syscalls like fallocate.
* tag 'xfs-5.16-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: map unwritten blocks in XFS_IOC_{ALLOC,FREE}SP just like fallocate
The generic function ptrace_report_syscall does a little more
than syscall_trace on m68k. The function ptrace_report_syscall
stops early if PT_TRACED is not set, it sets ptrace_message,
and returns the result of fatal_signal_pending.
Setting ptrace_message to a passed in value of 0 is effectively not
setting ptrace_message, making that additional work a noop.
Returning the result of fatal_signal_pending and letting the caller
ignore the result becomes a noop in this change.
When a process is ptraced, the flag PT_PTRACED is always set in
current->ptrace. Testing for PT_PTRACED in ptrace_report_syscall is
just an optimization to fail early if the process is not ptraced.
Later on in ptrace_notify, ptrace_stop will test current->ptrace under
tasklist_lock and skip performing any work if the task is not ptraced.
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Link: https://lkml.kernel.org/r/20220103213312.9144-8-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
In the function bacct_add_task the code reading task->exit_code was
introduced in commit f3cef7a994 ("[PATCH] csa: basic accounting over
taskstats"), and it is not entirely clear what the taskstats interface
is trying to return as only returning the exit_code of the first task
in a process doesn't make a lot of sense.
As best as I can figure the intent is to return task->exit_code after
a task exits. The field is returned with per task fields, so the
exit_code of the entire process is not wanted. Only the value of the
first task is returned so this is not a useful way to get the per task
ptrace stop code. The ordinary case of returning this value is
returning after a task exits, which also precludes use for getting
a ptrace value.
It is common to for the first task of a process to also be the last
task of a process so this field may have done something reasonable by
accident in testing.
Make ac_exitcode a reliable per task value by always returning it for
every exited task.
Setting ac_exitcode in a sensible mannter makes it possible to continue
to provide this value going forward.
Cc: Balbir Singh <bsingharora@gmail.com>
Fixes: f3cef7a994 ("[PATCH] csa: basic accounting over taskstats")
Link: https://lkml.kernel.org/r/20220103213312.9144-5-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
The function wait_task_zombie is defined to always returns the process not
thread exit status. Unfortunately when process group exit support
was added to wait_task_zombie the WNOWAIT case was overlooked.
Usually tsk->exit_code and tsk->signal->group_exit_code will be in sync
so fixing this is bug probably has no effect in practice. But fix
it anyway so that people aren't scratching their heads about why
the two code paths are different.
History-Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
Fixes: 2c66151cbc2c ("[PATCH] sys_exit() threading improvements, BK-curr")
Link: https://lkml.kernel.org/r/20220103213312.9144-3-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
The comment about coredumps not reaching do_group_exit and the
corresponding BUG_ON are bogus.
What happens and has happened for years is that get_signal calls
do_coredump (which sets SIGNAL_GROUP_EXIT and group_exit_code) and
then do_group_exit passing the signal number. Then do_group_exit
ignores the exit_code it is passed and uses signal->group_exit_code
from the coredump.
The comment and BUG_ON were correct when they were added during the
2.5 development cycle, but became obsolete and incorrect when
get_signal was changed to fall through to do_group_exit after
do_coredump in 2.6.10-rc2.
So remove the stale comment and BUG_ON
Fixes: 63bd6144f191 ("[PATCH] Invalid BUG_ONs in signal.c")
History-Tree: https://git.kernel.org/pub/scm/linux/kernel/git/tglx/history.git
Link: https://lkml.kernel.org/r/20220103213312.9144-2-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
All profile_handoff_task does is notify the task_free_notifier chain.
The helpers task_handoff_register and task_handoff_unregister are used
to add and delete entries from that chain and are never called.
So remove the dead code and make it much easier to read and reason
about __put_task_struct.
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/87fspyw6m0.fsf@email.froward.int.ebiederm.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
When I say remove I mean remove. All profile_task_exit and
profile_munmap do is call a blocking notifier chain. The helpers
profile_task_register and profile_task_unregister are not called
anywhere in the tree. Which means this is all dead code.
So remove the dead code and make it easier to read do_exit.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lkml.kernel.org/r/20220103213312.9144-1-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Fix kernel-doc warnings in kernel/signal.c:
kernel/signal.c:1830: warning: Function parameter or member 'force_coredump' not described in 'force_sig_seccomp'
kernel/signal.c:2873: warning: missing initial short description on line:
* signal_delivered -
Also add a closing parenthesis to the comments in signal_delivered().
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Richard Weinberger <richard@nod.at>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Marco Elver <elver@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20211222031027.29694-1-rdunlap@infradead.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This helper is misleading. It tests for an ongoing exec as well as
the process having received a fatal signal.
Sometimes it is appropriate to treat an on-going exec differently than
a process that is shutting down due to a fatal signal. In particular
taking the fast path out of exit_signals instead of retargeting
signals is not appropriate during exec, and not changing the the exit
code in do_group_exit during exec.
Removing the helper makes it more obvious what is going on as both
cases must be coded for explicitly.
While removing the helper fix the two cases where I have observed
using signal_group_exit resulted in the wrong result.
In exit_signals only test for SIGNAL_GROUP_EXIT so that signals are
retargetted during an exec.
In do_group_exit use 0 as the exit code during an exec as de_thread
does not set group_exit_code. As best as I can determine
group_exit_code has been is set to 0 most of the time during
de_thread. During a thread group stop group_exit_code is set to the
stop signal and when the thread group receives SIGCONT group_exit_code
is reset to 0.
Link: https://lkml.kernel.org/r/20211213225350.27481-8-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
The only remaining user of group_exit_task is exec. Rename the field
so that it is clear which part of the code uses it.
Update the comment above the definition of group_exec_task to document
how it is currently used.
Link: https://lkml.kernel.org/r/20211213225350.27481-7-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Currently the coredump code sets group_exit_task so that
signal_group_exit() will return true during a coredump. Now that the
coredump code always sets SIGNAL_GROUP_EXIT there is no longer a need
to set signal->group_exit_task.
Link: https://lkml.kernel.org/r/20211213225350.27481-6-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
After the previous cleanups "signal->core_state" is set whenever
SIGNAL_GROUP_COREDUMP is set and "signal->core_state" is tested
whenver the code wants to know if a coredump is in progress. The
remaining tests of SIGNAL_GROUP_COREDUMP also test to see if
SIGNAL_GROUP_EXIT is set. Similarly the only place that sets
SIGNAL_GROUP_COREDUMP also sets SIGNAL_GROUP_EXIT.
Which makes SIGNAL_GROUP_COREDUMP unecessary and redundant. So stop
setting SIGNAL_GROUP_COREDUMP, stop testing SIGNAL_GROUP_COREDUMP, and
remove it's definition.
With the setting of SIGNAL_GROUP_COREDUMP gone, coredump_finish no
longer needs to clear SIGNAL_GROUP_COREDUMP out of signal->flags
by setting SIGNAL_GROUP_EXIT.
Link: https://lkml.kernel.org/r/20211213225350.27481-5-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
There are only a few places that test SIGNAL_GROUP_EXIT and
are not also already testing SIGNAL_GROUP_COREDUMP.
This will not affect the callers of signal_group_exit as zap_process
also sets group_exit_task so signal_group_exit will continue to return
true at the same times.
This does not affect wait_task_zombie as the none of the threads
wind up in EXIT_ZOMBIE state during a coredump.
This does not affect oom_kill.c:__task_will_free_mem as
sig->core_state is tested and handled before SIGNAL_GROUP_EXIT is
tested for.
This does not affect complete_signal as signal->core_state is tested
for to ensure the coredump case is handled appropriately.
Link: https://lkml.kernel.org/r/20211213225350.27481-4-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Ever since commit 6cd8f0acae ("coredump: ensure that SIGKILL always
kills the dumping thread") it has been possible for a SIGKILL received
during a coredump to set SIGNAL_GROUP_EXIT and trigger a process
shutdown (for a second time).
Update the logic to explicitly allow coredumps so that coredumps can
set SIGNAL_GROUP_EXIT and shutdown like an ordinary process.
Link: https://lkml.kernel.org/r/87zgo6ytyf.fsf_-_@email.froward.int.ebiederm.org
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
In preparation for removing the flag SIGNAL_GROUP_COREDUMP, change
__task_will_free_mem to test signal->core_state instead of the flag
SIGNAL_GROUP_COREDUMP.
Both fields are protected by siglock and both live in signal_struct so
there are no real tradeoffs here, just a change to which field is
being tested.
Link: https://lkml.kernel.org/r/20211213225350.27481-3-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
With kernel threads on architectures that still have set_fs/get_fs
running as KERNEL_DS moving force_uaccess_begin does not appear safe.
Calling force_uaccess_begin is a noop on anything people care about.
Update the comment to explain why this code while looking like an
obvious candidate for moving to make_task_dead probably needs to
remain in do_exit until set_fs/get_fs are entirely removed from the
kernel.
Fixes: 05ea0424f0 ("exit: Move oops specific logic from do_exit into make_task_dead")
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/YdUxGKRcSiDy8jGg@zeniv-ca.linux.org.uk
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Change the task state to EXIT_DEAD and take an extra rcu_refernce
to guarantee the task will not be reaped and that it will not be
freed.
Link: https://lkml.kernel.org/r/YdUzjrLAlRiNLQp2@zeniv-ca.linux.org.uk
Pointed-out-by: Al Viro <viro@zeniv.linux.org.uk>
Fixes: 7f80a2fd7d ("exit: Stop poorly open coding do_task_dead in make_task_dead")
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
There have historically been two big uses of do_exit. The first is
it's design use to be the guts of the exit(2) system call. The second
use is to terminate a task after something catastrophic has happened
like a NULL pointer in kernel code. The function make_task_dead
has been added to accomidate the second use.
The call to do_exit in Linvalidmask is clearly not a normal userspace
exit. As failure handling there are two possible ways to go.
If userspace can trigger the issue force_exit_sig should be called.
Otherwise make_task_dead probably from the implementation of die
is appropriate.
Replace the call of do_exit in Linvalidmask with make_task_dead as
I don't know xtensa and especially xtensa assembly language well
enough to do anything else.
Link: https://lkml.kernel.org/r/YdUmN7n4W5YETUhW@zeniv-ca.linux.org.uk
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field. Move the s390 dasd sysfs code to use default_groups field
which has been the preferred way since commit aa30f47cf6 ("kobject:
Add support for default attribute groups to kobj_type") so that we can
soon get rid of the obsolete default_attrs field.
Cc: Stefan Haberland <sth@linux.ibm.com>
Cc: Jan Hoeppner <hoeppner@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220106095401.3274637-1-gregkh@linuxfoundation.org
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
There are currently 2 ways to create a set of sysfs files for a
kobj_type, through the default_attrs field, and the default_groups
field. Move the sclp_sd sysfs code to use default_groups field which
has been the preferred way since commit aa30f47cf6 ("kobject: Add
support for default attribute groups to kobj_type") so that we can
soon get rid of the obsolete default_attrs field.
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20220106095252.3273905-1-gregkh@linuxfoundation.org
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
When CONFIG_SYSFS is not enabled provide stubs for the helper functions
to not break their callers.
Fixes: 539b9c94ac ("power: supply: add helpers for charge_behaviour sysfs")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20220108153158.189489-1-linux@weissschuh.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Fix leaking the registered gpiod_lookup tables when the kcalloc() for the
i2c_clients array fails.
Fixes: ef2ac11493 ("platform/x86: x86-android-tablets: Add support for registering GPIO lookup tables")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20220108154947.136593-1-hdegoede@redhat.com
The Surface Go 3 needs some board data in order to configure the
TPS68470 PMIC - add entries to the tables in tps68470_board_data.c
that define the configuration that's needed.
Signed-off-by: Daniel Scally <djrscally@gmail.com>
Link: https://lore.kernel.org/r/20220106232045.41291-1-djrscally@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
When building ARCH=csky defconfig:
arch/csky/kernel/traps.c: In function 'die':
arch/csky/kernel/traps.c:112:17: error: implicit declaration of function
'make_dead_task' [-Werror=implicit-function-declaration]
112 | make_dead_task(SIGSEGV);
| ^~~~~~~~~~~~~~
The function's name is make_task_dead(), change it so there is no more
build error.
Fixes: 0e25498f8c ("exit: Add and use make_task_dead.")
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Guo Ren <guoren@kernel.org>
Link: https://lkml.kernel.org/r/20211227184851.2297759-4-nathan@kernel.org
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
