Emit an audit record whenever the system clock is changed (i.e. shifted
by a non-zero offset) by a syscall from userspace. The syscalls than can
(at the time of writing) trigger such record are:
- settimeofday(2), stime(2), clock_settime(2) -- via
do_settimeofday64()
- adjtimex(2), clock_adjtime(2) -- via do_adjtimex()
The new records have type AUDIT_TIME_INJOFFSET and contain the following
fields:
- sec -- the 'seconds' part of the offset
- nsec -- the 'nanoseconds' part of the offset
Example record (time was shifted backwards by ~15.875 seconds):
type=TIME_INJOFFSET msg=audit(1530616049.652:13): sec=-16 nsec=124887145
The records of this type will be associated with the corresponding
syscall records.
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Reviewed-by: Richard Guy Briggs <rgb@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
[PM: fixed a line width problem in __audit_tk_injoffset()]
Signed-off-by: Paul Moore <paul@paul-moore.com>
The original conditions that led to the use of list_empty() to optimize
list_for_each_entry_rcu() in auditfilter.c and auditsc.c code have been
removed without removing the list_empty() call, but this code example
has been copied several times. Remove the unnecessary list_empty()
calls.
Please see upstream github issue
https://github.com/linux-audit/audit-kernel/issues/112
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
In commit fa516b66a1 ("EVM: Allow runtime modification of the set of
verified xattrs"), the call to audit_log_start() is missing a context to
link it to an audit event. Since this event is in user context, add
the process' syscall context to the record.
In addition, the orphaned keyword "locked" appears in the record.
Normalize this by changing it to logging the locking string "." as any
other user input in the "xattr=" field.
Please see the github issue
https://github.com/linux-audit/audit-kernel/issues/109
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Acked-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This should never have been defined in the arch tree to begin with,
and now uapi/linux/audit.h header is going to use EM_UNICORE
in order to define AUDIT_ARCH_UNICORE which is needed to implement
syscall_get_arch() which in turn is required to extend
the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Ley Foon Tan <ley.foon.tan@intel.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Ley Foon Tan <lftan@altera.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: nios2-dev@lists.rocketboards.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This should never have been defined in the arch tree to begin with,
and now uapi/linux/audit.h header is going to use EM_NDS32
in order to define AUDIT_ARCH_NDS32 which is needed to implement
syscall_get_arch() which in turn is required to extend
the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Acked-by: Vincent Chen <vincentc@andestech.com>
Acked-by: Greentime Hu <greentime@andestech.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-hexagon@vger.kernel.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This should never have been defined in the arch tree to begin with,
and now uapi/linux/audit.h header is going to use EM_HEXAGON
in order to define AUDIT_ARCH_HEXAGON which is needed to implement
syscall_get_arch() which in turn is required to extend
the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: linux-hexagon@vger.kernel.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Mark Salter <msalter@redhat.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Aurelien Jacquiot <jacquiot.aurelien@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
syscall_get_arch() is required to be implemented on all architectures
in addition to already implemented syscall_get_nr(),
syscall_get_arguments(), syscall_get_error(), and
syscall_get_return_value() functions in order to extend the generic
ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Alexey Brodkin <alexey.brodkin@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
These should never have been defined in the arch tree to begin with, and
now uapi/linux/audit.h header is going to use EM_ARCOMPACT and EM_ARCV2
in order to define AUDIT_ARCH_ARCOMPACT and AUDIT_ARCH_ARCV2 which are
needed to implement syscall_get_arch() which in turn is required to
extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
Acked-by: Vineet Gupta <vgupta@synopsys.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Elvira Khabirova <lineprinter@altlinux.org>
Cc: Eugene Syromyatnikov <esyr@redhat.com>
Cc: Alexey Brodkin <alexey.brodkin@synopsys.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-audit@redhat.com
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Fix sparse warning:
kernel/auditsc.c:1150:6: warning: symbol 'audit_log_cap' was not declared. Should it be static?
kernel/auditsc.c:1908:6: warning: symbol 'audit_copy_inode' was not declared. Should it be static?
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Currently the AUDIT_LOGIN event is a standalone record that isn't
connected to any other records that may be part of its syscall event. To
avoid the confusion of generating two events, connect the records by
using its syscall context.
Please see the github issue
https://github.com/linux-audit/audit-kernel/issues/110
Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
module.name will be allocated unconditionally when auditing load
module, and audit_log_start() can fail with other reasons, or
audit_log_exit maybe not called, caused module.name is not freed
so free module.name in audit_free_context and __audit_syscall_exit
unreferenced object 0xffff88af90837d20 (size 8):
comm "modprobe", pid 1036, jiffies 4294704867 (age 3069.138s)
hex dump (first 8 bytes):
69 78 67 62 65 00 ff ff ixgbe...
backtrace:
[<0000000008da28fe>] __audit_log_kern_module+0x33/0x80
[<00000000c1491e61>] load_module+0x64f/0x3850
[<000000007fc9ae3f>] __do_sys_init_module+0x218/0x250
[<0000000000d4a478>] do_syscall_64+0x117/0x400
[<000000004924ded8>] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[<000000007dc331dd>] 0xffffffffffffffff
Fixes: ca86cad738 ("audit: log module name on init_module")
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Li RongQing <lirongqing@baidu.com>
[PM: manual merge fixup in __audit_syscall_exit()]
Signed-off-by: Paul Moore <paul@paul-moore.com>
Pull x86 asm updates from Thomas Gleixner:
"Two cleanup patches removing dead conditionals and unused code"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm: Remove unused __constant_c_x_memset() macro and inlines
x86/asm: Remove dead __GNUC__ conditionals
Pull perf fixes from Thomas Gleixner:
"Three fixes for the fallout from the TSX errata workaround:
- Prevent memory corruption caused by a unchecked out of bound array
index.
- Two trivial fixes to address compiler warnings"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Make dev_attr_allow_tsx_force_abort static
perf/x86: Fixup typo in stub functions
perf/x86/intel: Fix memory corruption
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Merge tag 'for-linus-5.1b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fix from Juergen Gross:
"A fix for a Xen bug introduced by David's series for excluding
ballooned pages in vmcores"
* tag 'for-linus-5.1b-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen/balloon: Fix mapping PG_offline pages to user space
Two fixes (leak on invalid mount argument and possible deadlock on
i_size update on 32bit smp) and a fall-through warning cleanup
----------------------------------------------------------------
Gustavo A. R. Silva (1):
9p: mark expected switch fall-through
Hou Tao (1):
9p: use inode->i_lock to protect i_size_write() under 32-bit
zhengbin (1):
9p/net: fix memory leak in p9_client_create
fs/9p/v9fs_vfs.h | 23 +++++++++++++++++++++--
fs/9p/vfs_file.c | 6 +++++-
fs/9p/vfs_inode.c | 23 +++++++++++------------
fs/9p/vfs_inode_dotl.c | 27 ++++++++++++++-------------
fs/9p/vfs_super.c | 4 ++--
net/9p/client.c | 2 +-
net/9p/trans_xen.c | 2 +-
7 files changed, 55 insertions(+), 32 deletions(-)
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Merge tag '9p-for-5.1' of git://github.com/martinetd/linux
Pull 9p updates from Dominique Martinet:
"Here is a 9p update for 5.1; there honestly hasn't been much.
Two fixes (leak on invalid mount argument and possible deadlock on
i_size update on 32bit smp) and a fall-through warning cleanup"
* tag '9p-for-5.1' of git://github.com/martinetd/linux:
9p/net: fix memory leak in p9_client_create
9p: use inode->i_lock to protect i_size_write() under 32-bit
9p: mark expected switch fall-through
When this .gitignore was added, lxdialog was an independent hostprogs-y.
Now that all objects in lxdialog/ are directly linked to mconf, the
lxdialog is no longer generated.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Currently, every arch/*/include/uapi/asm/Kbuild explicitly includes
the common Kbuild.asm file. Factor out the duplicated include directives
to scripts/Makefile.asm-generic so that no architecture would opt out
of the mandatory-y mechanism.
um is not forced to include mandatory-y since it is a very exceptional
case which does not support UAPI.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The generic-y is redundant under the following condition:
- arch has its own implementation
- the same header is added to generated-y
- the same header is added to mandatory-y
If a redundant generic-y is found, the warning like follows is displayed:
scripts/Makefile.asm-generic:20: redundant generic-y found in arch/arm/include/asm/Kbuild: timex.h
I fixed up arch Kbuild files found by this.
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
During a simple no-op (nothing changed) build I saw 39 invocations of
the C compiler with the argument "-print-file-name=include". We don't
need to call the C compiler 39 times for this--one time will suffice.
Let's change NOSTDINC_FLAGS to a simply expanded variable to avoid
this since there doesn't appear to be any reason it should be
recursively expanded.
On my build this shaved ~400 ms off my "no-op" build.
Note that the recursive expansion seems to date back to the (really
old) commit e8f5bdb02c ("[PATCH] Makefile include path ordering").
It's a little unclear to me if the point of that patch was to switch
the variable to be recursively expanded (which it did) or to avoid
directly assigning to NOSTDINC_FLAGS (AKA to switch to +=) because
someone else (out of tree?) was setting it. I presume later since if
the only goal was to switch to recursive expansion the patch would
have just removed the ":".
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
* The man page for dpkg-source(1) notes:
> -b, --build directory [format-specific-parameters]
> Build a source package (--build since dpkg 1.17.14).
> <...>
>
> dpkg-source will build the source package with the first
> format found in this ordered list: the format indicated
> with the --format command line option, the format
> indicated in debian/source/format, “1.0”. The fallback
> to “1.0” is deprecated and will be removed at some point
> in the future, you should always document the desired
> source format in debian/source/format. See section
> SOURCE PACKAGE FORMATS for an extensive description of
> the various source package formats.
Thus it would be more foolproof to explicitly use 1.0 (as we always
did) than to rely on dpkg-source's defaults.
* In a similar vein, debian/rules is not made executable by mkdebian,
and dpkg-source warns about that but still silently fixes the file.
Let's be explicit once again.
Signed-off-by: Arseny Maslennikov <ar@cs.msu.ru>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.
The implementation of this semantic code search is:
In a function, for a local variable returned by calling
of_find_device_by_node(),
a, if it is released by a function such as
put_device()/of_dev_put()/platform_device_put() after the last use,
it is considered that there is no reference leak;
b, if it is passed back to the caller via
dev_get_drvdata()/platform_get_drvdata()/get_device(), etc., the
reference will be released in other functions, and the current function
also considers that there is no reference leak;
c, for the rest of the situation, the current function should release the
reference by calling put_device, this code search will report the
corresponding error message.
By using this semantic code search, we have found some object reference leaks,
such as:
commit 11907e9d35 ("ASoC: fsl-asoc-card: fix object reference leaks in
fsl_asoc_card_probe")
commit a12085d139 ("mtd: rawnand: atmel: fix possible object reference leak")
commit 11493f2685 ("mtd: rawnand: jz4780: fix possible object reference leak")
There are still dozens of reference leaks in the current kernel code.
Further, for the case of b, the object returned to other functions may also
have a reference leak, we will continue to develop other cocci scripts to
further check the reference leak.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Reviewed-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Markus Elfring <Markus.Elfring@web.de>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
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Merge tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux
Pull pidfd system call from Christian Brauner:
"This introduces the ability to use file descriptors from /proc/<pid>/
as stable handles on struct pid. Even if a pid is recycled the handle
will not change. For a start these fds can be used to send signals to
the processes they refer to.
With the ability to use /proc/<pid> fds as stable handles on struct
pid we can fix a long-standing issue where after a process has exited
its pid can be reused by another process. If a caller sends a signal
to a reused pid it will end up signaling the wrong process.
With this patchset we enable a variety of use cases. One obvious
example is that we can now safely delegate an important part of
process management - sending signals - to processes other than the
parent of a given process by sending file descriptors around via scm
rights and not fearing that the given process will have been recycled
in the meantime. It also allows for easy testing whether a given
process is still alive or not by sending signal 0 to a pidfd which is
quite handy.
There has been some interest in this feature e.g. from systems
management (systemd, glibc) and container managers. I have requested
and gotten comments from glibc to make sure that this syscall is
suitable for their needs as well. In the future I expect it to take on
most other pid-based signal syscalls. But such features are left for
the future once they are needed.
This has been sitting in linux-next for quite a while and has not
caused any issues. It comes with selftests which verify basic
functionality and also test that a recycled pid cannot be signaled via
a pidfd.
Jon has written about a prior version of this patchset. It should
cover the basic functionality since not a lot has changed since then:
https://lwn.net/Articles/773459/
The commit message for the syscall itself is extensively documenting
the syscall, including it's functionality and extensibility"
* tag 'pidfd-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
selftests: add tests for pidfd_send_signal()
signal: add pidfd_send_signal() syscall
* Replace the /sys/class/dax device model with /sys/bus/dax, and include
a compat driver so distributions can opt-in to the new ABI.
* Allow for an alternative driver for the device-dax address-range
* Introduce the 'kmem' driver to hotplug / assign a device-dax
address-range to the core-mm.
* Arrange for the device-dax target-node to be onlined so that the newly
added memory range can be uniquely referenced by numa apis.
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Merge tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull device-dax updates from Dan Williams:
"New device-dax infrastructure to allow persistent memory and other
"reserved" / performance differentiated memories, to be assigned to
the core-mm as "System RAM".
Some users want to use persistent memory as additional volatile
memory. They are willing to cope with potential performance
differences, for example between DRAM and 3D Xpoint, and want to use
typical Linux memory management apis rather than a userspace memory
allocator layered over an mmap() of a dax file. The administration
model is to decide how much Persistent Memory (pmem) to use as System
RAM, create a device-dax-mode namespace of that size, and then assign
it to the core-mm. The rationale for device-dax is that it is a
generic memory-mapping driver that can be layered over any "special
purpose" memory, not just pmem. On subsequent boots udev rules can be
used to restore the memory assignment.
One implication of using pmem as RAM is that mlock() no longer keeps
data off persistent media. For this reason it is recommended to enable
NVDIMM Security (previously merged for 5.0) to encrypt pmem contents
at rest. We considered making this recommendation an actively enforced
requirement, but in the end decided to leave it as a distribution /
administrator policy to allow for emulation and test environments that
lack security capable NVDIMMs.
Summary:
- Replace the /sys/class/dax device model with /sys/bus/dax, and
include a compat driver so distributions can opt-in to the new ABI.
- Allow for an alternative driver for the device-dax address-range
- Introduce the 'kmem' driver to hotplug / assign a device-dax
address-range to the core-mm.
- Arrange for the device-dax target-node to be onlined so that the
newly added memory range can be uniquely referenced by numa apis"
NOTE! I'm not entirely happy with the whole "PMEM as RAM" model because
we currently have special - and very annoying rules in the kernel about
accessing PMEM only with the "MC safe" accessors, because machine checks
inside the regular repeat string copy functions can be fatal in some
(not described) circumstances.
And apparently the PMEM modules can cause that a lot more than regular
RAM. The argument is that this happens because PMEM doesn't necessarily
get scrubbed at boot like RAM does, but that is planned to be added for
the user space tooling.
Quoting Dan from another email:
"The exposure can be reduced in the volatile-RAM case by scanning for
and clearing errors before it is onlined as RAM. The userspace tooling
for that can be in place before v5.1-final. There's also runtime
notifications of errors via acpi_nfit_uc_error_notify() from
background scrubbers on the DIMM devices. With that mechanism the
kernel could proactively clear newly discovered poison in the volatile
case, but that would be additional development more suitable for v5.2.
I understand the concern, and the need to highlight this issue by
tapping the brakes on feature development, but I don't see PMEM as RAM
making the situation worse when the exposure is also there via DAX in
the PMEM case. Volatile-RAM is arguably a safer use case since it's
possible to repair pages where the persistent case needs active
application coordination"
* tag 'devdax-for-5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
device-dax: "Hotplug" persistent memory for use like normal RAM
mm/resource: Let walk_system_ram_range() search child resources
mm/memory-hotplug: Allow memory resources to be children
mm/resource: Move HMM pr_debug() deeper into resource code
mm/resource: Return real error codes from walk failures
device-dax: Add a 'modalias' attribute to DAX 'bus' devices
device-dax: Add a 'target_node' attribute
device-dax: Auto-bind device after successful new_id
acpi/nfit, device-dax: Identify differentiated memory with a unique numa-node
device-dax: Add /sys/class/dax backwards compatibility
device-dax: Add support for a dax override driver
device-dax: Move resource pinning+mapping into the common driver
device-dax: Introduce bus + driver model
device-dax: Start defining a dax bus model
device-dax: Remove multi-resource infrastructure
device-dax: Kill dax_region base
device-dax: Kill dax_region ida
This is the final round of mostly small fixes and performance
improvements to our initial submit. The main regression fix is the
ia64 simscsi build failure which was missed in the serial number
elimination conversion.
Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com>
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Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull more SCSI updates from James Bottomley:
"This is the final round of mostly small fixes and performance
improvements to our initial submit.
The main regression fix is the ia64 simscsi build failure which was
missed in the serial number elimination conversion"
* tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: (24 commits)
scsi: ia64: simscsi: use request tag instead of serial_number
scsi: aacraid: Fix performance issue on logical drives
scsi: lpfc: Fix error codes in lpfc_sli4_pci_mem_setup()
scsi: libiscsi: Hold back_lock when calling iscsi_complete_task
scsi: hisi_sas: Change SERDES_CFG init value to increase reliability of HiLink
scsi: hisi_sas: Send HARD RESET to clear the previous affiliation of STP target port
scsi: hisi_sas: Set PHY linkrate when disconnected
scsi: hisi_sas: print PHY RX errors count for later revision of v3 hw
scsi: hisi_sas: Fix a timeout race of driver internal and SMP IO
scsi: hisi_sas: Change return variable type in phy_up_v3_hw()
scsi: qla2xxx: check for kstrtol() failure
scsi: lpfc: fix 32-bit format string warning
scsi: lpfc: fix unused variable warning
scsi: target: tcmu: Switch to bitmap_zalloc()
scsi: libiscsi: fall back to sendmsg for slab pages
scsi: qla2xxx: avoid printf format warning
scsi: lpfc: resolve static checker warning in lpfc_sli4_hba_unset
scsi: lpfc: Correct __lpfc_sli_issue_iocb_s4 lockdep check
scsi: ufs: hisi: fix ufs_hba_variant_ops passing
scsi: qla2xxx: Fix panic in qla_dfs_tgt_counters_show
...
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Merge tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block
Pull more block layer changes from Jens Axboe:
"This is a collection of both stragglers, and fixes that came in after
I finalized the initial pull. This contains:
- An MD pull request from Song, with a few minor fixes
- Set of NVMe patches via Christoph
- Pull request from Konrad, with a few fixes for xen/blkback
- pblk fix IO calculation fix (Javier)
- Segment calculation fix for pass-through (Ming)
- Fallthrough annotation for blkcg (Mathieu)"
* tag 'for-5.1/block-post-20190315' of git://git.kernel.dk/linux-block: (25 commits)
blkcg: annotate implicit fall through
nvme-tcp: support C2HData with SUCCESS flag
nvmet: ignore EOPNOTSUPP for discard
nvme: add proper write zeroes setup for the multipath device
nvme: add proper discard setup for the multipath device
nvme: remove nvme_ns_config_oncs
nvme: disable Write Zeroes for qemu controllers
nvmet-fc: bring Disconnect into compliance with FC-NVME spec
nvmet-fc: fix issues with targetport assoc_list list walking
nvme-fc: reject reconnect if io queue count is reduced to zero
nvme-fc: fix numa_node when dev is null
nvme-fc: use nr_phys_segments to determine existence of sgl
nvme-loop: init nvmet_ctrl fatal_err_work when allocate
nvme: update comment to make the code easier to read
nvme: put ns_head ref if namespace fails allocation
nvme-trace: fix cdw10 buffer overrun
nvme: don't warn on block content change effects
nvme: add get-feature to admin cmds tracer
md: Fix failed allocation of md_register_thread
It's wrong to add len to sector_nr in raid10 reshape twice
...
Highlights include:
Bugfixes:
- Fix an Oops in SUNRPC back channel tracepoints
- Fix a SUNRPC client regression when handling oversized replies
- Fix the minimal size for SUNRPC reply buffer allocation
- rpc_decode_header() must always return a non-zero value on error
- Fix a typo in pnfs_update_layout()
Cleanups:
- Remove redundant check for the reply length in call_decode()
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Merge tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Highlights include:
Bugfixes:
- Fix an Oops in SUNRPC back channel tracepoints
- Fix a SUNRPC client regression when handling oversized replies
- Fix the minimal size for SUNRPC reply buffer allocation
- rpc_decode_header() must always return a non-zero value on error
- Fix a typo in pnfs_update_layout()
Cleanup:
- Remove redundant check for the reply length in call_decode()"
* tag 'nfs-for-5.1-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
SUNRPC: Remove redundant check for the reply length in call_decode()
SUNRPC: Handle the SYSTEM_ERR rpc error
SUNRPC: rpc_decode_header() must always return a non-zero value on error
SUNRPC: Use the ENOTCONN error on socket disconnect
SUNRPC: Fix the minimal size for reply buffer allocation
SUNRPC: Fix a client regression when handling oversized replies
pNFS: Fix a typo in pnfs_update_layout
fix null pointer deref in tracepoints in back channel
One fix to prevent runtime allocation of 16GB pages when running in a VM (as
opposed to bare metal), because it doesn't work.
A small fix to our recently added KCOV support to exempt some more code from
being instrumented.
Plus a few minor build fixes, a small dead code removal and a defconfig update.
Thanks to:
Alexey Kardashevskiy, Aneesh Kumar K.V, Christophe Leroy, Jason Yan, Joel
Stanley, Mahesh Salgaonkar, Mathieu Malaterre.
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Merge tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"One fix to prevent runtime allocation of 16GB pages when running in a
VM (as opposed to bare metal), because it doesn't work.
A small fix to our recently added KCOV support to exempt some more
code from being instrumented.
Plus a few minor build fixes, a small dead code removal and a
defconfig update.
Thanks to: Alexey Kardashevskiy, Aneesh Kumar K.V, Christophe Leroy,
Jason Yan, Joel Stanley, Mahesh Salgaonkar, Mathieu Malaterre"
* tag 'powerpc-5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s: Include <asm/nmi.h> header file to fix a warning
powerpc/powernv: Fix compile without CONFIG_TRACEPOINTS
powerpc/mm: Disable kcov for SLB routines
powerpc: remove dead code in head_fsl_booke.S
powerpc/configs: Sync skiroot defconfig
powerpc/hugetlb: Don't do runtime allocation of 16G pages in LPAR configuration
Pull vfs mount infrastructure fix from Al Viro:
"Fixup for sysfs braino.
Capabilities checks for sysfs mount do include those on netns, but
only if CONFIG_NET_NS is enabled. Sorry, should've caught that
earlier..."
* 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fix sysfs_init_fs_context() in !CONFIG_NET_NS case
Permission checks on current's netns should be done only when
netns are enabled.
Reported-by: Dominik Brodowski <linux@dominikbrodowski.net>
Fixes: 23bf1b6be9
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge tag '5.1-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6
Pull more smb3 updates from Steve French:
"Various tracing and debugging improvements, crediting fixes, some
cleanup, and important fallocate fix (fixes three xfstests) and lock
fix.
Summary:
- Various additional dynamic tracing tracepoints
- Debugging improvements (including ability to query the server via
SMB3 fsctl from userspace tools which can help with stats and
debugging)
- One minor performance improvement (root directory inode caching)
- Crediting (SMB3 flow control) fixes
- Some cleanup (docs and to mknod)
- Important fixes: one to smb3 implementation of fallocate zero range
(which fixes three xfstests) and a POSIX lock fix"
* tag '5.1-rc-smb3' of git://git.samba.org/sfrench/cifs-2.6: (22 commits)
CIFS: fix POSIX lock leak and invalid ptr deref
SMB3: Allow SMB3 FSCTL queries to be sent to server from tools
cifs: fix incorrect handling of smb2_set_sparse() return in smb3_simple_falloc
smb2: fix typo in definition of a few error flags
CIFS: make mknod() an smb_version_op
cifs: minor documentation updates
cifs: remove unused value pointed out by Coverity
SMB3: passthru query info doesn't check for SMB3 FSCTL passthru
smb3: add dynamic tracepoints for simple fallocate and zero range
cifs: fix smb3_zero_range so it can expand the file-size when required
cifs: add SMB2_ioctl_init/free helpers to be used with compounding
smb3: Add dynamic trace points for various compounded smb3 ops
cifs: cache FILE_ALL_INFO for the shared root handle
smb3: display volume serial number for shares in /proc/fs/cifs/DebugData
cifs: simplify how we handle credits in compound_send_recv()
smb3: add dynamic tracepoint for timeout waiting for credits
smb3: display security information in /proc/fs/cifs/DebugData more accurately
cifs: add a timeout argument to wait_for_free_credits
cifs: prevent starvation in wait_for_free_credits for multi-credit requests
cifs: wait_for_free_credits() make it possible to wait for >=1 credits
...
Pull UML updates from Richard Weinberger:
"Bugfix for the UML block device driver"
* 'for-linus-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
um: Fix for a possible OOPS in ubd initialization
um: Remove duplicated include from vector_user.c
for 32-bit guests
s390: interrupt cleanup, introduction of the Guest Information Block,
preparation for processor subfunctions in cpu models
PPC: bug fixes and improvements, especially related to machine checks
and protection keys
x86: many, many cleanups, including removing a bunch of MMU code for
unnecessary optimizations; plus AVIC fixes.
Generic: memcg accounting
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- some cleanups
- direct physical timer assignment
- cache sanitization for 32-bit guests
s390:
- interrupt cleanup
- introduction of the Guest Information Block
- preparation for processor subfunctions in cpu models
PPC:
- bug fixes and improvements, especially related to machine checks
and protection keys
x86:
- many, many cleanups, including removing a bunch of MMU code for
unnecessary optimizations
- AVIC fixes
Generic:
- memcg accounting"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (147 commits)
kvm: vmx: fix formatting of a comment
KVM: doc: Document the life cycle of a VM and its resources
MAINTAINERS: Add KVM selftests to existing KVM entry
Revert "KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()"
KVM: PPC: Book3S: Add count cache flush parameters to kvmppc_get_cpu_char()
KVM: PPC: Fix compilation when KVM is not enabled
KVM: Minor cleanups for kvm_main.c
KVM: s390: add debug logging for cpu model subfunctions
KVM: s390: implement subfunction processor calls
arm64: KVM: Fix architecturally invalid reset value for FPEXC32_EL2
KVM: arm/arm64: Remove unused timer variable
KVM: PPC: Book3S: Improve KVM reference counting
KVM: PPC: Book3S HV: Fix build failure without IOMMU support
Revert "KVM: Eliminate extra function calls in kvm_get_dirty_log_protect()"
x86: kvmguest: use TSC clocksource if invariant TSC is exposed
KVM: Never start grow vCPU halt_poll_ns from value below halt_poll_ns_grow_start
KVM: Expose the initial start value in grow_halt_poll_ns() as a module parameter
KVM: grow_halt_poll_ns() should never shrink vCPU halt_poll_ns
KVM: x86/mmu: Consolidate kvm_mmu_zap_all() and kvm_mmu_zap_mmio_sptes()
KVM: x86/mmu: WARN if zapping a MMIO spte results in zapping children
...
error checks.
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Merge tag 'trace-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes and cleanups from Steven Rostedt:
"This contains a series of last minute clean ups, small fixes and error
checks"
* tag 'trace-v5.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing/probe: Verify alloc_trace_*probe() result
tracing/probe: Check event/group naming rule at parsing
tracing/probe: Check the size of argument name and body
tracing/probe: Check event name length correctly
tracing/probe: Check maxactive error cases
tracing: kdb: Fix ftdump to not sleep
trace/probes: Remove kernel doc style from non kernel doc comment
tracing/probes: Make reserved_field_names static
- Fix a NULL-pointer dereference issue in the ACPI device
matching code of the AMD IOMMU driver
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Merge tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull IOMMU fix from Joerg Roedel:
"Fix a NULL-pointer dereference issue in the ACPI device matching code
of the AMD IOMMU driver"
* tag 'iommu-fix-v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/amd: Fix NULL dereference bug in match_hid_uid
- An improvement from Ard Biesheuvel, who noted that the identity map
setup was taking a long time due to flush_cache_louis().
- Update a comment about dma_ops from Wolfram Sang.
- Remove use of "-p" with ld, where this flag has been a no-op since
2004.
- Remove the printing of the virtual memory layout, which is no longer
useful since we hide pointers.
- Correct SCU help text.
- Remove legacy TWD registration method.
- Add pgprot_device() implementation for mapping PCI sysfs resource
files.
- Initialise PFN limits earlier for kmemleak.
- Fix argument count to match macro definition (affects clang builds)
- Use unified assembler language almost everywhere for clang, and
other clang improvements (from Stefan Agner, Nathan Chancellor).
- Support security extension for noMMU and other noMMU cleanups
(from Vladimir Murzin).
- Remove unnecessary SMP bringup code (which was incorrectly copy'n'
pasted from the ARM platform implementations) and remove it from
the arch code to discourge further copys of it appearing.
- Add Cortex A9 erratum preventing kexec working on some SoCs.
- AMBA bus identification updates from Mike Leach.
- More use of raw spinlocks to avoid -RT kernel issues
(from Yang Shi and Sebastian Andrzej Siewior).
- MCPM hyp/svc mode mismatch fixes from Marek Szyprowski.
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Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM updates from Russell King:
- An improvement from Ard Biesheuvel, who noted that the identity map
setup was taking a long time due to flush_cache_louis().
- Update a comment about dma_ops from Wolfram Sang.
- Remove use of "-p" with ld, where this flag has been a no-op since
2004.
- Remove the printing of the virtual memory layout, which is no longer
useful since we hide pointers.
- Correct SCU help text.
- Remove legacy TWD registration method.
- Add pgprot_device() implementation for mapping PCI sysfs resource
files.
- Initialise PFN limits earlier for kmemleak.
- Fix argument count to match macro definition (affects clang builds)
- Use unified assembler language almost everywhere for clang, and other
clang improvements (from Stefan Agner, Nathan Chancellor).
- Support security extension for noMMU and other noMMU cleanups (from
Vladimir Murzin).
- Remove unnecessary SMP bringup code (which was incorrectly copy'n'
pasted from the ARM platform implementations) and remove it from the
arch code to discourge further copys of it appearing.
- Add Cortex A9 erratum preventing kexec working on some SoCs.
- AMBA bus identification updates from Mike Leach.
- More use of raw spinlocks to avoid -RT kernel issues (from Yang Shi
and Sebastian Andrzej Siewior).
- MCPM hyp/svc mode mismatch fixes from Marek Szyprowski.
* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (32 commits)
ARM: 8849/1: NOMMU: Fix encodings for PMSAv8's PRBAR4/PRLAR4
ARM: 8848/1: virt: Align GIC version check with arm64 counterpart
ARM: 8847/1: pm: fix HYP/SVC mode mismatch when MCPM is used
ARM: 8845/1: use unified assembler in c files
ARM: 8844/1: use unified assembler in assembly files
ARM: 8843/1: use unified assembler in headers
ARM: 8841/1: use unified assembler in macros
ARM: 8840/1: use a raw_spinlock_t in unwind
ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
ARM: 8837/1: coresight: etmv4: Update ID register table to add UCI support
ARM: 8836/1: drivers: amba: Update component matching to use the CoreSight UCI values.
ARM: 8838/1: drivers: amba: Updates to component identification for driver matching.
ARM: 8833/1: Ensure that NEON code always compiles with Clang
ARM: avoid Cortex-A9 livelock on tight dmb loops
ARM: smp: remove arch-provided "pen_release"
ARM: actions: remove boot_lock and pen_release
ARM: oxnas: remove CPU hotplug implementation
ARM: qcom: remove unnecessary boot_lock
ARM: 8832/1: NOMMU: Limit visibility for CONFIG_FLASH_{MEM_BASE,SIZE}
ARM: 8831/1: NOMMU: pmsa-v8: remove unneeded semicolon
...
transport improvements, and a reworking of the peer_db_addr to all for
better abstraction
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Merge tag 'ntb-5.1' of git://github.com/jonmason/ntb
Pull NTB updates from Jon Mason:
- fixes for switchtec debugability and mapping table entries
- NTB transport improvements
- a reworking of the peer_db_addr for better abstraction
* tag 'ntb-5.1' of git://github.com/jonmason/ntb:
NTB: add new parameter to peer_db_addr() db_bit and db_data
NTB: ntb_transport: Ensure the destination buffer is mapped for TX DMA
NTB: ntb_transport: Free MWs in ntb_transport_link_cleanup()
ntb_hw_switchtec: Added support of >=4G memory windows
ntb_hw_switchtec: NT req id mapping table register entry number should be 512
ntb_hw_switchtec: debug print 64bit aligned crosslink BAR Numbers
- fix memory access if logo is bigger than the screen (Manfred
Schlaegl)
- silence fbcon logo on 'quiet' boots (Prarit Bhargava)
- use kvmalloc() for scrollback buffer in fbcon (Konstantin Khorenko)
- misc fixes (Colin Ian King, YueHaibing, Matteo Croce, Mathieu
Malaterre, Anders Roxell, Arnd Bergmann)
- misc cleanups (Rob Herring, Lubomir Rintel, Greg Kroah-Hartman,
Jani Nikula, Michal Vokáč)
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Merge tag 'fbdev-v5.1' of git://github.com/bzolnier/linux
Pull fbdev updates from Bartlomiej Zolnierkiewicz:
"Just a couple of small fixes and cleanups:
- fix memory access if logo is bigger than the screen (Manfred
Schlaegl)
- silence fbcon logo on 'quiet' boots (Prarit Bhargava)
- use kvmalloc() for scrollback buffer in fbcon (Konstantin Khorenko)
- misc fixes (Colin Ian King, YueHaibing, Matteo Croce, Mathieu
Malaterre, Anders Roxell, Arnd Bergmann)
- misc cleanups (Rob Herring, Lubomir Rintel, Greg Kroah-Hartman,
Jani Nikula, Michal Vokáč)"
* tag 'fbdev-v5.1' of git://github.com/bzolnier/linux:
fbdev: mbx: fix a misspelled variable name
fbdev: omap2: fix warnings in dss core
video: fbdev: Fix potential NULL pointer dereference
fbcon: Silence fbcon logo on 'quiet' boots
printk: Export console_printk
ARM: dts: imx28-cfa10036: Fix the reset gpio signal polarity
video: ssd1307fb: Do not hard code active-low reset sequence
dt-bindings: display: ssd1307fb: Remove reset-active-low from examples
fbdev: fbmem: fix memory access if logo is bigger than the screen
video/fbdev: refactor video= cmdline parsing
fbdev: mbx: fix up debugfs file creation
fbdev: omap2: no need to check return value of debugfs_create functions
video: fbdev: geode: remove ifdef OLPC noise
video: offb: annotate implicit fall throughs
omapfb: fix typo
fbdev: Use of_node_name_eq for node name comparisons
fbcon: use kvmalloc() for scrollback buffer
fbdev: chipsfb: remove set but not used variable 'size'
fbdev/via: fix spelling mistake "Expandsion" -> "Expansion"
Pull i2c fixes from Wolfram Sang:
"A set of driver bugfixes and an improvement for a core helper"
* 'i2c/for-current-fixed' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
i2c: i2c-designware-platdrv: Always use a dynamic adapter number
i2c: i2c-designware-platdrv: Cleanup setting of the adapter number
i2c: add extra check to safe DMA buffer helper
i2c: i2c-stm32f7: Fix SDADEL minimum formula
i2c: rcar: explain the lockless design
i2c: rcar: fix concurrency issue related to ICDMAER
i2c: sis630: correct format strings
i2c: mediatek: modify threshold passed to i2c_get_dma_safe_msg_buf()
Ondrej Mosnacek