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All users have now been converted to printbufs.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
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This converts the seq_bufs in dynevent_cmd and trace_seq to printbufs.
- read_pos in seq_buf doesn't exist in printbuf, so is added to
trace_seq
- seq_buf_to_user doesn't have a printbuf equivalent, so is inlined
into trace_seq_to_user
- seq_buf_putmem_hex currently swabs bytes on little endian, hardcoded
to 8 byte units. This patch switches it to prt_hex_bytes(), which
does _not_ swab.
Otherwise this is largely a direct conversion, with a few slight
refactorings and cleanups.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
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Tracing is the last user of seq_buf, which has been replaced by
printbufs elsewhere; move out of lib/ since it's no longer the standard
API.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
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The upcoming patch to switch tracing from seq_buf to printbuf means
we're no longer pulling in headers that we used to; this adds a missing
include so things don't break.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linux-acpi@vger.kernel.org
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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This implements a new printbuf version of d_path()/mangle_path(), which
will replace the seq_buf version.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
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This converts from seq_buf to printbuf.
This code was using seq_buf for building up dynamically allocated
strings; the conversion uses printbuf's heap allocation functionality to
simplify things (no longer need to calculate size of the output string).
Also, alphabetize the #includes.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
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This converts from seq_buf to printbuf. We're using printbuf in external
buffer mode so this is a direct conversion.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linux-pci@vger.kernel.org
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This converts from seq_buf to printbuf. We're using printbuf in external
buffer mode so it's a trivial direct conversion.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: x86@kernel.org
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This converts from seq_buf to printbuf. We're using printbuf in external
buffer mode, so it's a direct conversion, aside from some trivial
refactoring in cpu_show_meltdown() to make the code more consistent.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org
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This converts from seq_buf to printbuf. Here we're using printbuf with
an external buffer, meaning it's a direct conversion.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: nvdimm@lists.linux.dev
Acked-by: Dan Williams <dan.j.williams@intel.com>
Tested-By: Shivaprasad G Bhat <sbhat@linux.ibm.com>
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This converts from seq_buf to printbuf, which is similar but heap
allocates the string buffer.
Previously in this code the string buffer was allocated on the stack;
this means we've added a new potential memory allocation failure. This
is fine though since it's only for a dev_printk() message.
Memory allocation context: printbuf doesn't take gfp flags, instead we
prefer the new memalloc_no*_(save|restore) interfaces to be used. Here
the surrounding code is already allocating with GFP_KERNEL, so
everything is fine.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: linux-tegra@vger.kernel.org
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This converts memory_stat_format() from seq_buf to printbuf. Printbuf is
simalar to seq_buf except that it heap allocates the string buffer:
here, we were already heap allocating the buffer with kmalloc() so the
conversion is trivial.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Acked-by: Michal Hocko <mhocko@suse.com>
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seq_buf is being deprecated, this converts to printbuf.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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This patch cleans up printf_spec handling: these functions only use
spec.field_width and they do not interpret it in the normal way -
instead it's a number of bits/bytes passed in to print, so these
functions are changed to take that parameter directly.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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- eliminate on-stack buffer in device_node_string
- eliminate unnecessary uses of printf_spec, lift format string
precision/field width to pointer()
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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We're attempting to consolidate printf_spec and format string handling
in the top level vpr_buf(), this changes time_and_date() to not
take printf_spec.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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We're attempting to consolidate printf_spec and format string handling
in the top level vpr_buf(), this changes time_and_date() to not
take printf_spec.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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- We're attempting to consolidate printf_spec and format string
handling in the top level ptr_vprintf(), this changes
mac_address_string() to not take printf_spec
- With the new printbuf helpers there's no need to use a separate stack
allocated buffer, so this patch deletes it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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- We're attempting to consolidate printf_spec and format string
handling in the top level vpr_buf(), this changes ip_addr_string() to
not take printf_spec
- With the new printbuf helpers there's no need to use a separate stack
allocated buffer, so this patch deletes it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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- We're attempting to consolidate printf_spec and format string
handling in the top level vpr_buf(), this changes fourcc_string() to
not take printf_spec
- With the new printbuf helpers there's no need to use a separate stack
allocated buffer, so this patch deletes it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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Two changes:
- We're attempting to consolidate printf_spec and format string
handling in the top level vpr_buf(), this changes resource_string to
not take printf_spec
- With the new printbuf helpers there's no need to use a separate stack
allocated buffer, so this patch deletes it.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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printf_spec is right now something of a mess - it's a grab-bag of state
that's interpreted inconsistently by different code, and it's scattered
throughout vsprintf.c.
We'd like to get it out of the pretty-printers, and have it be solely
the responsibility of vsprintf()/vpr_buf(), the code that parses and
handles format strings.
Most of the code that uses printf_spec is only using it for a minimum &
maximum field width - that can be done at the toplevel by checking how
much we just printed, and padding or truncating it as necessary. This
patch takes those "simple" uses of printf_spec and moves them as far up
the call stack as possible.
This patch also renames some helpers and creates new ones that don't
take printf_spec:
- do_width_precision: new helper that handles with/precision of
printf_spec
- error_string -> error_string_spec
- check_pointer -> check_pointer_spec
- string -> string_spec
Next patches will be reducing/eliminating uses of the *_spec versions.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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The current test code checks that sprintf never writes past the
terminating nul. This is a rather strange requirement, completely
separate from writing past the end of the buffer, which of course we
can't do: writing anywhere to the buffer passed to snprintf, within size
of course, should be perfectly fine.
Since this check has no documentation as to where it comes from or what
depends on it, and it's getting in the way of further refactoring
(printf_spec handling is right now scattered massively throughout the
code, and we'd like to consolidate it) - delete it.
Also, many current pretty-printers building up their output on the
stack, and then copy it to the actual output buffer - by eliminating
this requirement we can kill those extra buffers.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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This adds two new-style printbuf helpers for printing simple u64s, and
converts num_to_str() to be a simple wrapper around prt_u64_minwidth().
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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This patch refactors number() to make it a bit clearer, and it also
changes it to call printbuf_make_room() only once at the start, instead
of in the printbuf output helpers.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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This adds options to printbuf for specifying whether units should be
printed raw (default) or with human readable units, and for controlling
whether human-readable units should be base 2 (default), or base 10.
This also adds new helpers that obey these options:
- pr_human_readable_u64
- pr_human_readable_s64
These obey printbuf->si_units
- pr_units_u64
- pr_units_s64
These obey both printbuf-human_readable_units and printbuf->si_units
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This patch adds two new features to printbuf for structured formatting:
- Indent level: the indent level, as a number of spaces, may be
increased with pr_indent_add() and decreased with pr_indent_sub().
Subsequent lines, when started with pr_newline() (not "\n", although
that may change) will then be intended according to the current
indent level. This helps with pretty-printers that structure a large
amonut of data across multiple lines and multiple functions.
- Tabstops: Tabstops may be set by assigning to the printbuf->tabstops
array.
Then, pr_tab() may be used to advance to the next tabstop, printing
as many spaces as required - leaving previous output left justified
to the previous tabstop. pr_tab_rjust() advances to the next tabstop
but inserts the spaces just after the previous tabstop - right
justifying the previously-outputted text to the next tabstop.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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This makes printbufs optionally heap allocated: a printbuf initialized
with the PRINTBUF initializer will automatically heap allocate and
resize as needed.
Allocations are done with GFP_KERNEL: code should use e.g.
memalloc_nofs_save()/restore() as needed. Since we do not currently have
memalloc_nowait_save()/restore(), in contexts where it is not safe to
block we provide the helpers
printbuf_atomic_inc()
printbuf_atomic_dec()
When the atomic count is nonzero, memory allocations will be done with
GFP_NOWAIT.
On memory allocation failure, output will be truncated. Code that wishes
to check for memory allocation failure (in contexts where we should
return -ENOMEM) should check if printbuf->allocation_failure is set.
Since printbufs are expected to be typically used for log messages and
on a best effort basis, we don't return errors directly.
Other helpers provided by this patch:
- printbuf_make_room(buf, extra)
Reallocates if necessary to make room for @extra bytes (not including
terminating null).
- printbuf_str(buf)
Returns a null terminated string equivalent to the contents of @buf.
If @buf was never allocated (or allocation failed), returns a
constant empty string.
- printbuf_exit(buf)
Releases memory allocated by a printbuf.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
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printbuf now needs to know the number of characters that would have been
written if the buffer was too small, like snprintf(); this changes
string_get_size() to return the return value of snprintf().
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Andy Shevchenko <andy@kernel.org>
Acked-by: Andy Shevchenko <andy@kernel.org>
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This converts most of the hexdump code to printbufs, along with some
significant cleanups and a bit of reorganization. The old non-printbuf
functions are mostly left as wrappers around the new printbuf versions.
Big note: byte swabbing behaviour
Previously, hex_dump_to_buffer() would byteswab the groups of bytes
being printed on little endian machines. This behaviour is... not
standard or typical for a hex dumper, and this behaviour was silently
added/changed without documentation (in 2007).
Given that the hex dumpers are just used for debugging output, nothing
is likely to break, and hopefully by reverting to more standard
behaviour the end result will be _less_ confusion, modulo a few kernel
developers who will certainly be annoyed by their tools changing.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Mikulas Patocka <mpatocka@redhat.com>
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This converts vsnprintf() to printbufs: instead of passing around raw
char * pointers for current buf position and end of buf, we have a real
type!
This makes the calling convention for our existing pretty printers a lot
saner and less error prone, plus printbufs add some new helpers that
make the code smaller and more readable, with a lot less crazy pointer
arithmetic.
There are a lot more refactorings to be done: this patch tries to stick
to just converting the calling conventions, as that needs to be done all
at once in order to avoid introducing a ton of wrappers that will just
be deleted.
Thankfully we have good unit tests for printf, and they have been run
and are all passing with this patch.
We have two new exported functions with this patch:
- prt_printf(), which is like snprintf but outputs to a printbuf
- prt_vprintf, like vsnprintf
These are the actual core print routines now - vsnprintf() is a wrapper
around prt_vprintf().
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
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Like the upcoming vsprintf.c conversion, this converts string_escape_mem
to prt_escaped_string(), which uses and outputs to a printbuf, and makes
string_escape_mem() a smaller wrapper to support existing users.
The new printbuf helpers greatly simplify the code.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Cc: Andy Shevchenko <andy@kernel.org>
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This adds printbufs: a printbuf points to a char * buffer and knows the
size of the output buffer as well as the current output position.
Future patches will be adding more features to printbuf, but initially
printbufs are targeted at refactoring and improving our existing code in
lib/vsprintf.c - so this initial printbuf patch has the features
required for that.
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
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git://git.samba.org/sfrench/cifs-2.6
Pull cifs updates from Steve French:
"Mostly cleanup, including smb1 refactoring:
- multichannel perf improvement
- move additional SMB1 code to not be compiled in when legacy support
is disabled.
- bug fixes, including one important one for memory leak
- various cleanup patches
We are still working on and testing some deferred close improvements
including an important lease break fix for case when multiple deferred
closes are still open, and also some additional perf improvements -
those are not included here"
* tag '5.20-rc-smb3-client-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6:
cifs: update internal module number
cifs: alloc_mid function should be marked as static
cifs: remove "cifs_" prefix from init/destroy mids functions
cifs: remove useless DeleteMidQEntry()
cifs: when insecure legacy is disabled shrink amount of SMB1 code
cifs: trivial style fixup
cifs: fix wrong unlock before return from cifs_tree_connect()
cifs: avoid use of global locks for high contention data
cifs: remove remaining build warnings
cifs: list_for_each() -> list_for_each_entry()
cifs: update MAINTAINERS file with reviewers
smb2: small refactor in smb2_check_message()
cifs: Fix memory leak when using fscache
cifs: remove minor build warning
cifs: remove some camelCase and also some static build warnings
cifs: remove unnecessary (void*) conversions.
cifs: remove unnecessary type castings
cifs: remove redundant initialization to variable mnt_sign_enabled
smb3: check xattr value length earlier
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git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull misc updates from Andrew Morton:
"Updates to various subsystems which I help look after. lib, ocfs2,
fatfs, autofs, squashfs, procfs, etc. A relatively small amount of
material this time"
* tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits)
scripts/gdb: ensure the absolute path is generated on initial source
MAINTAINERS: kunit: add David Gow as a maintainer of KUnit
mailmap: add linux.dev alias for Brendan Higgins
mailmap: update Kirill's email
profile: setup_profiling_timer() is moslty not implemented
ocfs2: fix a typo in a comment
ocfs2: use the bitmap API to simplify code
ocfs2: remove some useless functions
lib/mpi: fix typo 'the the' in comment
proc: add some (hopefully) insightful comments
bdi: remove enum wb_congested_state
kernel/hung_task: fix address space of proc_dohung_task_timeout_secs
lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t()
squashfs: support reading fragments in readahead call
squashfs: implement readahead
squashfs: always build "file direct" version of page actor
Revert "squashfs: provide backing_dev_info in order to disable read-ahead"
fs/ocfs2: Fix spelling typo in comment
ia64: old_rr4 added under CONFIG_HUGETLB_PAGE
proc: fix test for "vsyscall=xonly" boot option
...
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git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev
Pull fbdev updates from Helge Deller:
"The two major changes in this patchset corrects VGA modes, color
handling and various other smaller fixes in the Atari framebuffer (by
Geert Uytterhoeven), and devm_* conversion, platform data fixes and
header cleanups in the imxfb driver (by Uwe Kleine-König).
Other small patches clean up code in sa1100fb, cirrusfb and omapfb,
fix a refcount leak in amba-clcd (by Liang He), and adds parameter
checks to arkfb, i740fb, vt8623fb and s3fb (by Zheyu Ma)"
* tag 'for-5.20/fbdev-1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: (27 commits)
video: fbdev: s3fb: Check the size of screen before memset_io()
video: fbdev: arkfb: Check the size of screen before memset_io()
video: fbdev: vt8623fb: Check the size of screen before memset_io()
video: fbdev: i740fb: Check the argument of i740_calc_vclk()
video: fbdev: arkfb: Fix a divide-by-zero bug in ark_set_pixclock()
video: fbdev: imxfb: fix return value check in imxfb_probe()
video: fbdev: sis: fix typos in SiS_GetModeID()
video: fbdev: imxfb: Convert request_mem_region + ioremap to devm_ioremap_resource
video: fbdev: imxfb: Fold <linux/platform_data/video-imxfb.h> into only user
video: fbdev: imxfb: Drop unused symbols from header
video: fbdev: imxfb: Drop platform data support
video: fbdev: amba-clcd: Fix refcount leak bugs
video: fbdev: omapfb: Unexport omap*_update_window_async()
video: fbdev: atari: Remove backward bug-compatibility
video: fbdev: atari: Remove unused definitions and variables
video: fbdev: atari: Fix VGA modes
video: fbdev: atari: Fix TT High video mode vertical refresh
video: fbdev: atari: Remove unneeded casts to void *
video: fbdev: atari: Remove unneeded casts from void *
video: fbdev: atari: Fix ext_setcolreg()
...
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
- build fix for old(er) binutils
- build fix for new GCC
- kexec boot environment fix
* tag 'x86-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/entry: Build thunk_$(BITS) only if CONFIG_PREEMPTION=y
x86/numa: Use cpumask_available instead of hardcoded NULL check
x86/bus_lock: Don't assume the init value of DEBUGCTLMSR.BUS_LOCK_DETECT to be zero
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Various fixes: a deadline scheduler fix, a migration fix, a Sparse fix
and a comment fix"
* tag 'sched-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/core: Do not requeue task on CPU excluded from cpus_mask
sched/rt: Fix Sparse warnings due to undefined rt.c declarations
exit: Fix typo in comment: s/sub-theads/sub-threads
sched, cpuset: Fix dl_cpu_busy() panic due to empty cs->cpus_allowed
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Misc fixes to kprobes and the faddr2line script, plus a cleanup"
* tag 'perf-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Fix ';;' typo
scripts/faddr2line: Add CONFIG_DEBUG_INFO check
scripts/faddr2line: Fix vmlinux detection on arm64
x86/kprobes: Update kcb status flag after singlestepping
kprobes: Forbid probing on trampoline and BPF code areas
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Alexander Gordeev:
- Rework copy_oldmem_page() callback to take an iov_iter.
This includes a few prerequisite updates and fixes to the oldmem
reading code.
- Rework cpufeature implementation to allow for various CPU feature
indications, which is not only limited to hardware capabilities, but
also allows CPU facilities.
- Use the cpufeature rework to autoload Ultravisor module when CPU
facility 158 is available.
- Add ELF note type for encrypted CPU state of a protected virtual CPU.
The zgetdump tool from s390-tools package will decrypt the CPU state
using a Customer Communication Key and overwrite respective notes to
make the data accessible for crash and other debugging tools.
- Use vzalloc() instead of vmalloc() + memset() in ChaCha20 crypto
test.
- Fix incorrect recovery of kretprobe modified return address in
stacktrace.
- Switch the NMI handler to use generic irqentry_nmi_enter() and
irqentry_nmi_exit() helper functions.
- Rework the cryptographic Adjunct Processors (AP) pass-through design
to support dynamic changes to the AP matrix of a running guest as
well as to implement more of the AP architecture.
- Minor boot code cleanups.
- Grammar and typo fixes to hmcdrv and tape drivers.
* tag 's390-5.20-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (46 commits)
Revert "s390/smp: enforce lowcore protection on CPU restart"
Revert "s390/smp: rework absolute lowcore access"
Revert "s390/smp,ptdump: add absolute lowcore markers"
s390/unwind: fix fgraph return address recovery
s390/nmi: use irqentry_nmi_enter()/irqentry_nmi_exit()
s390: add ELF note type for encrypted CPU state of a PV VCPU
s390/smp,ptdump: add absolute lowcore markers
s390/smp: rework absolute lowcore access
s390/setup: rearrange absolute lowcore initialization
s390/boot: cleanup adjust_to_uv_max() function
s390/smp: enforce lowcore protection on CPU restart
s390/tape: fix comment typo
s390/hmcdrv: fix Kconfig "its" grammar
s390/docs: fix warnings for vfio_ap driver doc
s390/docs: fix warnings for vfio_ap driver lock usage doc
s390/crash: support multi-segment iterators
s390/crash: use static swap buffer for copy_to_user_real()
s390/crash: move copy_to_user_real() to crash_dump.c
s390/zcore: fix race when reading from hardware system area
s390/crash: fix incorrect number of bytes to copy to user space
...
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Pull MIPS updates from Thomas Bogendoerfer:
- added support for Netgear WNR3500L v2
- removed support for VR41xx SoC and platforms based on it
- cleanups and fixes
* tag 'mips_6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux: (25 commits)
MIPS: tlbex: Explicitly compare _PAGE_NO_EXEC against 0
Revert "MIPS: octeon: Remove vestiges of CONFIG_CAVIUM_RESERVE32"
MIPS: Introduce CAVIUM_RESERVE32 Kconfig option
MIPS: msi-octeon: eliminate kernel-doc warnings
MIPS: Fix comment typo
MIPS: BMIPS: Utilize cfe_die() for invalid DTB
MIPS: CFE: Add cfe_die()
MIPS: Fixed __debug_virt_addr_valid()
MIPS: BCM47XX: Add support for Netgear WNR3500L v2
MIPS: Remove VR41xx support
MIPS: dts: align gpio-key node names with dtschema
MIPS: dts: correct gpio-keys names and properties
MIPS: cpuinfo: Fix a warning for CONFIG_CPUMASK_OFFSTACK
MIPS: Make phys_to_virt utilize __va()
MIPS: vdso: Utilize __pa() for gic_pfn
MIPS: mm: Use the bitmap API to allocate bitmaps
MIPS: math-emu: Use the bitmap API to allocate bitmaps
MIPS: Loongson64: Fix section mismatch warning
mips: cavium-octeon: Fix missing of_node_put() in octeon2_usb_clocks_start
MIPS: mscc: ocelot: enable FDMA usage
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman:
- Add support for syscall stack randomization
- Add support for atomic operations to the 32 & 64-bit BPF JIT
- Full support for KASAN on 64-bit Book3E
- Add a watchdog driver for the new PowerVM hypervisor watchdog
- Add a number of new selftests for the Power10 PMU support
- Add a driver for the PowerVM Platform KeyStore
- Increase the NMI watchdog timeout during live partition migration, to
avoid timeouts due to increased memory access latency
- Add support for using the 'linux,pci-domain' device tree property for
PCI domain assignment
- Many other small features and fixes
Thanks to Alexey Kardashevskiy, Andy Shevchenko, Arnd Bergmann, Athira
Rajeev, Bagas Sanjaya, Christophe Leroy, Erhard Furtner, Fabiano Rosas,
Greg Kroah-Hartman, Greg Kurz, Haowen Bai, Hari Bathini, Jason A.
Donenfeld, Jason Wang, Jiang Jian, Joel Stanley, Juerg Haefliger, Kajol
Jain, Kees Cook, Laurent Dufour, Madhavan Srinivasan, Masahiro Yamada,
Maxime Bizon, Miaoqian Lin, Murilo Opsfelder Araújo, Nathan Lynch,
Naveen N. Rao, Nayna Jain, Nicholas Piggin, Ning Qiang, Pali Rohár,
Petr Mladek, Rashmica Gupta, Sachin Sant, Scott Cheloha, Segher
Boessenkool, Stephen Rothwell, Uwe Kleine-König, Wolfram Sang, Xiu
Jianfeng, and Zhouyi Zhou.
* tag 'powerpc-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (191 commits)
powerpc/64e: Fix kexec build error
EDAC/ppc_4xx: Include required of_irq header directly
powerpc/pci: Fix PHB numbering when using opal-phbid
powerpc/64: Init jump labels before parse_early_param()
selftests/powerpc: Avoid GCC 12 uninitialised variable warning
powerpc/cell/axon_msi: Fix refcount leak in setup_msi_msg_address
powerpc/xive: Fix refcount leak in xive_get_max_prio
powerpc/spufs: Fix refcount leak in spufs_init_isolated_loader
powerpc/perf: Include caps feature for power10 DD1 version
powerpc: add support for syscall stack randomization
powerpc: Move system_call_exception() to syscall.c
powerpc/powernv: rename remaining rng powernv_ functions to pnv_
powerpc/powernv/kvm: Use darn for H_RANDOM on Power9
powerpc/powernv: Avoid crashing if rng is NULL
selftests/powerpc: Fix matrix multiply assist test
powerpc/signal: Update comment for clarity
powerpc: make facility_unavailable_exception 64s
powerpc/platforms/83xx/suspend: Remove write-only global variable
powerpc/platforms/83xx/suspend: Prevent unloading the driver
powerpc/platforms/83xx/suspend: Reorder to get rid of a forward declaration
...
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git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V updates from Palmer Dabbelt:
- Enabling the FPU is now a static_key
- Improvements to the Svpbmt support
- CPU topology bindings for a handful of systems
- Support for systems with 64-bit hart IDs
- Many settings have been enabled in the defconfig, including both
support for the StarFive systems and many of the Docker requirements
There are also a handful of cleanups and improvements, as usual.
* tag 'riscv-for-linus-5.20-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (28 commits)
riscv: enable Docker requirements in defconfig
riscv: convert the t-head pbmt errata to use the __nops macro
riscv: introduce nops and __nops macros for NOP sequences
RISC-V: Add fast call path of crash_kexec()
riscv: mmap with PROT_WRITE but no PROT_READ is invalid
riscv/efi_stub: Add 64bit boot-hartid support on RV64
riscv: cpu: Add 64bit hartid support on RV64
riscv: smp: Add 64bit hartid support on RV64
riscv: spinwait: Fix hartid variable type
riscv: cpu_ops_sbi: Add 64bit hartid support on RV64
riscv: dts: sifive: "fix" pmic watchdog node name
riscv: dts: canaan: Add k210 topology information
riscv: dts: sifive: Add fu740 topology information
riscv: dts: sifive: Add fu540 topology information
riscv: dts: starfive: Add JH7100 CPU topology
RISC-V: Add CONFIG_{NON,}PORTABLE
riscv: config: enable SOC_STARFIVE in defconfig
riscv: dts: microchip: Add mpfs' topology information
riscv: Kconfig.socs: Add comments
riscv: Kconfig.erratas: Add comments
...
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Pull 9p updates from Dominique Martinet:
- a couple of fixes
- add a tracepoint for fid refcounting
- some cleanup/followup on fid lookup
- some cleanup around req refcounting
* tag '9p-for-5.20' of https://github.com/martinetd/linux:
net/9p: Initialize the iounit field during fid creation
net: 9p: fix refcount leak in p9_read_work() error handling
9p: roll p9_tag_remove into p9_req_put
9p: Add client parameter to p9_req_put()
9p: Drop kref usage
9p: Fix some kernel-doc comments
9p fid refcount: cleanup p9_fid_put calls
9p fid refcount: add a 9p_fid_ref tracepoint
9p fid refcount: add p9_fid_get/put wrappers
9p: Fix minor typo in code comment
9p: Remove unnecessary variable for old fids while walking from d_parent
9p: Make the path walk logic more clear about when cloning is required
9p: Track the root fid with its own variable during lookups
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git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
Pull gfs2 updates from Andreas Gruenbacher:
- Instantiate glocks ouside of the glock state engine, in the contect
of the process taking the glock. This moves unnecessary complexity
out of the core glock code. Clean up the instantiate logic to be more
sensible.
- In gfs2_glock_async_wait(), cancel pending locking request upon
failure. Make sure all glocks are left in a consistent state.
- Various other minor cleanups and fixes.
* tag 'gfs2-v5.19-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
gfs2: List traversal in do_promote is safe
gfs2: do_promote glock holder stealing fix
gfs2: Use better variable name
gfs2: Make go_instantiate take a glock
gfs2: Add new go_held glock operation
gfs2: Revert 'Fix "truncate in progress" hang'
gfs2: Instantiate glocks ouside of glock state engine
gfs2: Fix up gfs2_glock_async_wait
gfs2: Minor gfs2_glock_nq_m cleanup
gfs2: Fix spelling mistake in comment
gfs2: Rewrap overlong comment in do_promote
gfs2: Remove redundant NULL check before kfree
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This reverts commit 4bf7fda4dce22214c70c49960b1b6438e6260b67.
It turns out that it was hopelessly naive to think that this would work,
considering that we've always done this. The first machine I actually
tested this on broke at bootup, getting to
Reached target cryptsetup.target - Local Encrypted Volumes.
and then hanging. It's unclear what actually fails, since there's a lot
else going on around that time (eg amdgpu probing also happens around
that same time, but it could be some other random init thing that didn't
complete earlier and just caused the boot to hang at that point).
The expectations that we should default to some unsafe and untested mode
seems entirely unfounded, and the belief that this wouldn't affect
modern systems is clearly entirely false. The machine in question is
about two years old, so it's not exactly shiny, but it's also not some
dusty old museum piece PDP-11 in a closet.
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: John Garry <john.garry@huawei.com>
Cc: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull more device mapper updates from Mike Snitzer:
- Add flags argument to dm_bufio_client_create and introduce
DM_BUFIO_CLIENT_NO_SLEEP flag to have dm-bufio use spinlock rather
than mutex for its locking.
- Add optional "try_verify_in_tasklet" feature to DM verity target.
This feature gives users the option to improve IO latency by using a
tasklet to verify, using hashes in bufio's cache, rather than wait to
schedule a work item via workqueue. But if there is a bufio cache
miss, or an error, then the tasklet will fallback to using workqueue.
- Incremental changes to both dm-bufio and the DM verity target to use
jump_label to minimize cost of branching associated with the niche
"try_verify_in_tasklet" feature. DM-bufio in particular is used by
quite a few other DM targets so it doesn't make sense to incur
additional bufio cost in those targets purely for the benefit of this
niche verity feature if the feature isn't ever used.
- Optimize verity_verify_io, which is used by both workqueue and
tasklet based verification, if FEC is not configured or tasklet based
verification isn't used.
- Remove DM verity target's verify_wq's use of the WQ_CPU_INTENSIVE
flag since it uses WQ_UNBOUND. Also, use the WQ_HIGHPRI flag if
"try_verify_in_tasklet" is specified.
* tag 'for-6.0/dm-changes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm verity: have verify_wq use WQ_HIGHPRI if "try_verify_in_tasklet"
dm verity: remove WQ_CPU_INTENSIVE flag since using WQ_UNBOUND
dm verity: only copy bvec_iter in verity_verify_io if in_tasklet
dm verity: optimize verity_verify_io if FEC not configured
dm verity: conditionally enable branching for "try_verify_in_tasklet"
dm bufio: conditionally enable branching for DM_BUFIO_CLIENT_NO_SLEEP
dm verity: allow optional args to alter primary args handling
dm verity: Add optional "try_verify_in_tasklet" feature
dm bufio: Add DM_BUFIO_CLIENT_NO_SLEEP flag
dm bufio: Add flags argument to dm_bufio_client_create
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git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping updates from Christoph Hellwig:
- convert arm32 to the common dma-direct code (Arnd Bergmann, Robin
Murphy, Christoph Hellwig)
- restructure the PCIe peer to peer mapping support (Logan Gunthorpe)
- allow the IOMMU code to communicate an optional DMA mapping length
and use that in scsi and libata (John Garry)
- split the global swiotlb lock (Tianyu Lan)
- various fixes and cleanup (Chao Gao, Dan Carpenter, Dongli Zhang,
Lukas Bulwahn, Robin Murphy)
* tag 'dma-mapping-5.20-2022-08-06' of git://git.infradead.org/users/hch/dma-mapping: (45 commits)
swiotlb: fix passing local variable to debugfs_create_ulong()
dma-mapping: reformat comment to suppress htmldoc warning
PCI/P2PDMA: Remove pci_p2pdma_[un]map_sg()
RDMA/rw: drop pci_p2pdma_[un]map_sg()
RDMA/core: introduce ib_dma_pci_p2p_dma_supported()
nvme-pci: convert to using dma_map_sgtable()
nvme-pci: check DMA ops when indicating support for PCI P2PDMA
iommu/dma: support PCI P2PDMA pages in dma-iommu map_sg
iommu: Explicitly skip bus address marked segments in __iommu_map_sg()
dma-mapping: add flags to dma_map_ops to indicate PCI P2PDMA support
dma-direct: support PCI P2PDMA pages in dma-direct map_sg
dma-mapping: allow EREMOTEIO return code for P2PDMA transfers
PCI/P2PDMA: Introduce helpers for dma_map_sg implementations
PCI/P2PDMA: Attempt to set map_type if it has not been set
lib/scatterlist: add flag for indicating P2PDMA segments in an SGL
swiotlb: clean up some coding style and minor issues
dma-mapping: update comment after dmabounce removal
scsi: sd: Add a comment about limiting max_sectors to shost optimal limit
ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors
scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit
...
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git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu updates from Joerg Roedel:
- The most intrusive patch is small and changes the default allocation
policy for DMA addresses.
Before the change the allocator tried its best to find an address in
the first 4GB. But that lead to performance problems when that space
gets exhaused, and since most devices are capable of 64-bit DMA these
days, we changed it to search in the full DMA-mask range from the
beginning.
This change has the potential to uncover bugs elsewhere, in the
kernel or the hardware. There is a Kconfig option and a command line
option to restore the old behavior, but none of them is enabled by
default.
- Add Robin Murphy as reviewer of IOMMU code and maintainer for the
dma-iommu and iova code
- Chaning IOVA magazine size from 1032 to 1024 bytes to save memory
- Some core code cleanups and dead-code removal
- Support for ACPI IORT RMR node
- Support for multiple PCI domains in the AMD-Vi driver
- ARM SMMU changes from Will Deacon:
- Add even more Qualcomm device-tree compatible strings
- Support dumping of IMP DEF Qualcomm registers on TLB sync
timeout
- Fix reference count leak on device tree node in Qualcomm driver
- Intel VT-d driver updates from Lu Baolu:
- Make intel-iommu.h private
- Optimize the use of two locks
- Extend the driver to support large-scale platforms
- Cleanup some dead code
- MediaTek IOMMU refactoring and support for TTBR up to 35bit
- Basic support for Exynos SysMMU v7
- VirtIO IOMMU driver gets a map/unmap_pages() implementation
- Other smaller cleanups and fixes
* tag 'iommu-updates-v5.20-or-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (116 commits)
iommu/amd: Fix compile warning in init code
iommu/amd: Add support for AVIC when SNP is enabled
iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement
ACPI/IORT: Fix build error implicit-function-declaration
drivers: iommu: fix clang -wformat warning
iommu/arm-smmu: qcom_iommu: Add of_node_put() when breaking out of loop
iommu/arm-smmu-qcom: Add SM6375 SMMU compatible
dt-bindings: arm-smmu: Add compatible for Qualcomm SM6375
MAINTAINERS: Add Robin Murphy as IOMMU SUBSYTEM reviewer
iommu/amd: Do not support IOMMUv2 APIs when SNP is enabled
iommu/amd: Do not support IOMMU_DOMAIN_IDENTITY after SNP is enabled
iommu/amd: Set translation valid bit only when IO page tables are in use
iommu/amd: Introduce function to check and enable SNP
iommu/amd: Globally detect SNP support
iommu/amd: Process all IVHDs before enabling IOMMU features
iommu/amd: Introduce global variable for storing common EFR and EFR2
iommu/amd: Introduce Support for Extended Feature 2 Register
iommu/amd: Change macro for IOMMU control register bit shift to decimal value
iommu/exynos: Enable default VM instance on SysMMU v7
iommu/exynos: Add SysMMU v7 register set
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