Btrfs updates the device node timestamps for block device special files
when it stop using the device.
Commit 8f96a5bfa1 ("btrfs: update the bdev time directly when closing")
switch that update from the correct layering to directly call the
low-level helper on the bdev inode. This is wrong and got fixed in
commit 54fde91f52 ("btrfs: update device path inode time instead of
bd_inode") by updating the file system inode instead of the bdev inode,
but this kept the incorrect bypassing of the VFS interfaces and file
system ->update_times method. Fix this by using the propet vfs_utimes
interface.
Fixes: 8f96a5bfa1 ("btrfs: update the bdev time directly when closing")
Fixes: 54fde91f52 ("btrfs: update device path inode time instead of bd_inode")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251120064859.2911749-5-hch@lst.de
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This will be used to replace an incorrect direct call into
generic_update_time in btrfs.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251120064859.2911749-4-hch@lst.de
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
FMODE_NOCMTIME used to be just a hack for the legacy XFS handle-based
"invisible I/O", but commit e5e9b24ab8 ("nfsd: freeze c/mtime updates
with outstanding WRITE_ATTRS delegation") started using it from
generic callers.
I'm not sure other file systems are actually read for this in general,
so the above commit should get a closer look, but for it to make any
sense, file_update_time needs to respect the flag.
Lift the check from file_modified_flags to file_update_time so that
users of file_update_time inherit the behavior and so that all the
checks are done in one place.
Fixes: e5e9b24ab8 ("nfsd: freeze c/mtime updates with outstanding WRITE_ATTRS delegation")
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251120064859.2911749-3-hch@lst.de
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Currently the two high-level APIs use two helper functions to implement
almost all of the logic. Refactor the two helpers and the common logic
into a new file_update_time_flags routine that gets the iocb flags or
0 in case of file_update_time passed so that the entire logic is
contained in a single function and can be easily understood and modified.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251120064859.2911749-2-hch@lst.de
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Otherwise it gets inlined notably in walk_component(), which convinces
the compiler to push/pop additional registers in the fast path to
accomodate existence of the inlined version.
Shortens the fast path of that routine from 87 to 71 bytes.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251119144930.2911698-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Stats from nd->depth usage during the venerable kernel build collected like so:
bpftrace -e 'kprobe:terminate_walk,kprobe:walk_component,kprobe:legitimize_links
{ @[probe] = lhist(((struct nameidata *)arg0)->depth, 0, 8, 1); }'
@[kprobe:legitimize_links]:
[0, 1) 6554906 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
[1, 2) 3534 | |
@[kprobe:terminate_walk]:
[0, 1) 12153664 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
@[kprobe:walk_component]:
[0, 1) 53075749 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
[1, 2) 971421 | |
[2, 3) 84946 | |
Additionally a custom probe was added for depth within link_path_walk():
bpftrace -e 'kprobe:link_path_walk_probe { @[probe] = lhist(arg0, 0, 8, 1); }'
@[kprobe:link_path_walk_probe]:
[0, 1) 7528231 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@|
[1, 2) 407905 |@@ |
Given these results:
1. terminate_walk() is called towards the end of the lookup and in this
test it never had any links to clean up.
2. legitimize_links() is also called towards the end of lookup and most
of the time there s 0 depth. Patch consumers to avoid calling into it
in that case.
3. walk_component() is typically called with WALK_MORE and zero depth,
checked in that order. Check depth first and predict it is 0.
4. link_path_walk() also does not deal with a symlink most of the time
when !*name
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251119142954.2909394-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
In the stock variant the compiler spills several registers on the stack
and employs stack smashing protection, adding even more code + a branch
on exit..
The actual fast path is small enough that the compiler inlines it for
all callers -- the symbol is no longer emitted.
Forcing noinline on it just for code-measurement purposes shows the fast
path dropping from 111 to 39 bytes.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251114201803.2183505-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Commit 2f952c9e8f ("fs: split fileattr related helpers into separate
file") added various exports without users despite claiming to be a
simple refactor. Drop them again.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20251119101415.2732320-1-hch@lst.de
Signed-off-by: Christian Brauner <brauner@kernel.org>
Replace the now deprecated kmap_atomic() with kmap_local_page().
Optimize for the non-highmem cases and avoid disabling preemption and
pagefaults, the caller's context is atomic anyway, but that is irrelevant
to kmap. The memcpy itself does not require any such semantics and the
mapping would hold valid across context switches anyway. Further, highmem
is planned to to be removed[1].
[1] https://lore.kernel.org/all/4ff89b72-03ff-4447-9d21-dd6a5fe1550f@app.fastmail.com/
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Link: https://patch.msgid.link/20251118210706.1816303-1-dave@stgolabs.net
Signed-off-by: Christian Brauner <brauner@kernel.org>
Rationale:
- ND_ROOT_PRESET is only set in a condition already marked unlikely
- LOOKUP_IS_SCOPED already has unlikely on it, but inconsistently
applied
- set_root() only fails if there is a bug
- most names are not empty (see !*s)
- most of the time path_init() does not encounter LOOKUP_CACHED without
LOOKUP_RCU
- LOOKUP_IN_ROOT is a rarely seen flag
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251105150630.756606-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
On stock kernel gcc 14 emits avoidable register spillage:
endbr64
call ffffffff81374630 <__fentry__>
push %r13
push %r12
push %rbx
sub $0x8,%rsp
[snip]
Total fast path is 99 bytes.
Moving the slowpath out avoids it and shortens the fast path to 74
bytes.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251110095634.1433061-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Helps out some of the asm, the routine is still a mess.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251109125254.1288882-1-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Support for block sizes greater than the page size depends on large
folios, which in turn require CONFIG_TRANSPARENT_HUGEPAGE to be enabled.
Because the code is wrapped in multiple layers of abstraction, this
dependency is rather obscure, so users may not realize it and may be
unsure how to enable LBS.
As suggested by Theodore, I have added hint messages in sb_set_blocksize
so that users can distinguish whether a mount failure with block size
larger than page size is due to lack of filesystem support or the absence
of CONFIG_TRANSPARENT_HUGEPAGE.
Suggested-by: Theodore Ts'o <tytso@mit.edu>
Link: https://patch.msgid.link/20251110043226.GD2988753@mit.edu
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Link: https://patch.msgid.link/20251110124714.1329978-1-libaokun@huaweicloud.com
Reviewed-by: Zhang Yi <yi.zhang@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Mateusz Guzik <mjguzik@gmail.com> says:
In short, MAY_WRITE checks are elided.
This obsoletes the idea of pre-computing if perm checks are necessary as
that turned out to be too hairy. The new code has 2 more branches per
path component compared to that idea, but the perf difference for
typical paths (< 6 components) was basically within noise. To be
revisited if someone(tm) removes other slowdowns.
Instead of the pre-computing thing I added IOP_FASTPERM_MAY_EXEC so that
filesystems like btrfs can still avoid the hard work.
* patches from https://patch.msgid.link/20251107142149.989998-1-mjguzik@gmail.com:
fs: retire now stale MAY_WRITE predicts in inode_permission()
btrfs: utilize IOP_FASTPERM_MAY_EXEC
fs: speed up path lookup with cheaper handling of MAY_EXEC
Link: https://patch.msgid.link/20251107142149.989998-1-mjguzik@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
The primary non-MAY_WRITE consumer now uses lookup_inode_permission_may_exec().
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251107142149.989998-4-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Root filesystem was ext4, btrfs was mounted on /testfs.
Then issuing access(2) in a loop on /testfs/repos/linux/include/linux/fs.h
on Sapphire Rapids (ops/s):
before: 3447976
after: 3620879 (+5%)
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251107142149.989998-3-mjguzik@gmail.com
Acked-by: David Sterba <dsterba@suse.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
The generic inode_permission() routine does work which is known to be of
no significance for lookup. There are checks for MAY_WRITE, while the
requested permission is MAY_EXEC. Additionally devcgroup_inode_permission()
is called to check for devices, but it is an invariant the inode is a
directory.
Absent a ->permission func, execution lands in generic_permission()
which checks upfront if the requested permission is granted for
everyone.
We can elide the branches which are guaranteed to be false and cut
straight to the check if everyone happens to be allowed MAY_EXEC on the
inode (which holds true most of the time).
Moreover, filesystems which provide their own ->permission routine can
take advantage of the optimization by setting the IOP_FASTPERM_MAY_EXEC
flag on their inodes, which they can legitimately do if their MAY_EXEC
handling matches generic_permission().
As a simple benchmark, as part of compilation gcc issues access(2) on
numerous long paths, for example /usr/lib/gcc/x86_64-linux-gnu/12/crtendS.o
Issuing access(2) on it in a loop on ext4 on Sapphire Rapids (ops/s):
before: 3797556
after: 3987789 (+5%)
Note: this depends on the not-yet-landed ext4 patch to mark inodes with
cache_no_acl()
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251107142149.989998-2-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Now that we build with -fms-extensions, union pipe_index can be
included as an anonymous member in struct pipe_inode_info, avoiding
the duplication.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Link: https://patch.msgid.link/20251023082142.2104456-1-linux@rasmusvillemoes.dk
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
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Merge patch "kbuild: Add '-fms-extensions' to areas with dedicated CFLAGS"
Nathan Chancellor <nathan@kernel.org> says:
Shared branch between Kbuild and other trees for enabling
'-fms-extensions' for 6.19.
* tag 'kbuild-ms-extensions-6.19' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/kbuild/linux:
kbuild: Add '-fms-extensions' to areas with dedicated CFLAGS
Kbuild: enable -fms-extensions
jfs: Rename _inline to avoid conflict with clang's '-fms-extensions'
Link: https://patch.msgid.link/20251101-kbuild-ms-extensions-dedicated-cflags-v1-1-38004aba524b@kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Replace deprecated simple_strtoul() with kstrtouint() for better error
handling and input validation. Return 0 on parsing failure to indicate
invalid parameter, maintaining existing behavior for valid inputs.
The simple_strtoul() function is deprecated in favor of kstrtoint()
family functions which provide better error handling and are recommended
for new code and replacements.
Signed-off-by: Kaushlendra Kumar <kaushlendra.kumar@intel.com>
Link: https://patch.msgid.link/20251103080627.1844645-1-kaushlendra.kumar@intel.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Qu Wenruo <wqu@suse.com> says:
The first patch is a cleanup related to sync_inodes_one_sb() callback.
Since it always wait for the writeback, there is no need to pass any
parameter for it.
The second patch is a fix mostly affecting btrfs, as btrfs requires a
explicit sync_fc() call with wait == 1, to commit its super blocks,
and sync_bdevs() won't cut it at all.
However the current emergency sync never passes wait == 1, it means
btrfs will writeback all dirty data and metadata, but still no super
block update, resulting everything still pointing back to the old
data/metadata.
This lead to a problem where btrfs doesn't seem to do anything during
emergency sync.
The second patch fixes the problem by passing wait == 1 for the second
iteration of sync_fs_one_sb().
* patches from https://patch.msgid.link/cover.1762142636.git.wqu@suse.com:
fs: fully sync all fses even for an emergency sync
fs: do not pass a parameter for sync_inodes_one_sb()
Link: https://patch.msgid.link/cover.1762142636.git.wqu@suse.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
[BUG]
There is a bug report that during emergency sync, btrfs only write back
all the dirty data and metadadta, but no full transaction commit,
resulting the super block still pointing to the old trees, thus the end
user can only see the old data, not the newer one.
[CAUSE]
Initially this looks like a btrfs specific bug, since ext4 doesn't get
affected by this one.
But the root problem here is, a combination of btrfs features and the no
wait nature of emergency sync.
Firstly do_sync_work() will call sync_inodes_one_sb() for every fs, to
writeback all the dirty pages for the fs.
Btrfs will properly writeback all dirty pages, including both data and
the updated metadata. So far so good.
Then sync_fs_one_sb() called with @nowait, in the case of btrfs it means
no full transaction commit, thus no super block update.
At this stage, btrfs is only one super block update away to be fully committed.
I believe it's the more or less the same for other fses too.
The problem is the next step, sync_bdevs().
Normally other fses have their super block already updated in the page
cache of the block device, but btrfs only updates the super block during
full transaction commit.
So sync_bdevs() may work for other fses, but not for btrfs, btrfs is
still using its older super block, all pointing back to the old metadata
and data.
Thus if after emergency sync, power loss happened, the end user will
only see the old data, not the newer one, despite that everything but the
super block is already written back.
[FIX]
Since the emergency sync is already executing in a workqueue, I didn't
see much need to only do a nowait sync.
Especially after the fact that sync_inodes_one_sb() always wait for the
writeback to finish.
Instead for the second iteration of sync_fs_one_sb(), pass wait == 1
into it, so fses like btrfs can properly commit its super blocks.
Reported-by: Askar Safin <safinaskar@gmail.com>
Link: https://lore.kernel.org/linux-btrfs/20251101150429.321537-1-safinaskar@gmail.com/
Signed-off-by: Qu Wenruo <wqu@suse.com>
Link: https://patch.msgid.link/7b7fd40c5fe440b633b6c0c741d96ce93eb5a89a.1762142636.git.wqu@suse.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
The function sync_inodes_one_sb() will always wait for the writeback,
and ignore the optional parameter.
Explicitly pass NULL as parameter for the call sites inside
do_sync_work().
Signed-off-by: Qu Wenruo <wqu@suse.com>
Link: https://patch.msgid.link/8079af1c4798cb36887022a8c51547a727c353cf.1762142636.git.wqu@suse.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
1. we already expect the refcount is 1.
2. path creation predicts name == iname
I verified this straightens out the asm, no functional changes.
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://patch.msgid.link/20251029134952.658450-1-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
eCryptfs uses MD5 for a couple unusual purposes: to "mix" the key into
the IVs for file contents encryption (similar to ESSIV), and to prepend
some key-dependent bytes to the plaintext when encrypting filenames
(which is useless since eCryptfs encrypts the filenames with ECB).
Currently, eCryptfs computes these MD5 hashes using the crypto_shash
API. Update it to instead use the MD5 library API. This is simpler and
faster: the library doesn't require memory allocations, can't fail, and
provides direct access to MD5 without overhead such as indirect calls.
To preserve the existing behavior of eCryptfs support being disabled
when the kernel is booted with "fips=1", make ecryptfs_get_tree() check
fips_enabled itself. Previously it relied on crypto_alloc_shash("md5")
failing. I don't know for sure that this is actually needed; e.g., it
could be argued that eCryptfs's use of MD5 isn't for a security purpose
as far as FIPS is concerned. But this preserves the existing behavior.
Tested by verifying that an existing eCryptfs can still be mounted with
a kernel that has this commit, with all the files matching. Also tested
creating a filesystem with this commit and mounting+reading it without.
Signed-off-by: Eric Biggers <ebiggers@kernel.org>
Link: https://patch.msgid.link/20251011200010.193140-1-ebiggers@kernel.org
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
iomap_dio_zero() uses a custom allocated memory of zeroes for padding
zeroes. This was a temporary solution until there was a way to request a
zero folio that was greater than the PAGE_SIZE.
Use largest_zero_folio() function instead of using the custom allocated
memory of zeroes. There is no guarantee from largest_zero_folio()
function that it will always return a PMD sized folio. Adapt the code so
that it can also work if largest_zero_folio() returns a ZERO_PAGE.
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Replace simple_strtol() with the recommended kstrtoint() for parsing the
'ramdisk_start=' boot parameter. Unlike simple_strtol(), which returns a
a long, kstrtoint() converts the string directly to an integer and
avoids implicit casting.
Check the return value of kstrtoint() and reject invalid values. This
adds error handling while preserving existing behavior for valid values,
and removes use of the deprecated simple_strtol() helper.
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This is a follow up to commit c4781dc3d1 ("Kbuild: enable
-fms-extensions") but in a separate change due to being substantially
different from the initial submission.
There are many places within the kernel that use their own CFLAGS
instead of the main KBUILD_CFLAGS, meaning code written with the main
kernel's use of '-fms-extensions' in mind that may be tangentially
included in these areas will result in "error: declaration does not
declare anything" messages from the compiler.
Add '-fms-extensions' to all these areas to ensure consistency, along
with -Wno-microsoft-anon-tag to silence clang's warning about use of the
extension that the kernel cares about using. parisc does not build with
clang so it does not need this warning flag. LoongArch does not need it
either because -W flags from KBUILD_FLAGS are pulled into cflags-vdso.
Reported-by: Christian Brauner <brauner@kernel.org>
Closes: https://lore.kernel.org/20251030-meerjungfrau-getrocknet-7b46eacc215d@brauner/
Reviewed-by: Christian Brauner <brauner@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Building fs/jfs with clang and '-fms-extensions' errors with:
In file included from fs/jfs/jfs_unicode.c:8:
fs/jfs/jfs_incore.h:86:13: error: type name does not allow function specifier to be specified
86 | unchar _inline[128];
| ^
fs/jfs/jfs_incore.h:86:20: error: expected member name or ';' after declaration specifiers
86 | unchar _inline[128];
| ~~~~~~~~~~~~~~^
'-fms-extensions' in clang enables several other Microsoft specific
keywords such as _inline [1], presumably for compatibility with MSVC, as
Microsoft's documentation [2] mentions:
For compatibility with previous versions, _inline and _forceinline are
synonyms for __inline and __forceinline, respectively
Rename the _inline array in 'struct jfs_inode_info' to _inline_sym to
avoid this conflict, which is not a large workaround as this member is
only ever referred to via the i_inline macro.
Link: 249883d0c5/clang/include/clang/Basic/TokenKinds.def (L744-L79) [1]
Link: https://learn.microsoft.com/en-us/cpp/c-language/inline-functions [2]
Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Link: https://patch.msgid.link/20251023-jfs-fix-conflict-with-clang-ms-ext-v1-1-e219d59a1e68@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Here are some small char/misc/android driver fixes for 6.18-rc3 for
reported issues. Included in here are:
- rust binder fixes for reported issues
- mei device id addition
- mei driver fixes
- comedi bugfix
- most usb driver bugfixes
- fastrpc memory leak fix
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc/android driver fixes for 6.18-rc3 for
reported issues. Included in here are:
- rust binder fixes for reported issues
- mei device id addition
- mei driver fixes
- comedi bugfix
- most usb driver bugfixes
- fastrpc memory leak fix
All of these have been in linux-next for a while with no reported
issues"
* tag 'char-misc-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
most: usb: hdm_probe: Fix calling put_device() before device initialization
most: usb: Fix use-after-free in hdm_disconnect
binder: remove "invalid inc weak" check
mei: txe: fix initialization order
comedi: fix divide-by-zero in comedi_buf_munge()
mei: late_bind: Fix -Wincompatible-function-pointer-types-strict
misc: fastrpc: Fix dma_buf object leak in fastrpc_map_lookup
mei: me: add wildcat lake P DID
misc: amd-sbi: Clarify that this is a BMC driver
nvmem: rcar-efuse: add missing MODULE_DEVICE_TABLE
binder: Fix missing kernel-doc entries in binder.c
rust_binder: report freeze notification only when fully frozen
rust_binder: don't delete FreezeListener if there are pending duplicates
rust_binder: freeze_notif_done should resend if wrong state
rust_binder: remove warning about orphan mappings
rust_binder: clean `clippy::mem_replace_with_default` warning
Here are some small staging driver fixes for the gpib subsystem to
resolve some reported issues. Included in here are:
- memory leak fixes
- error code fixes
- proper protocol fixes
All of these have been in linux-next for almost 2 weeks now with no
reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are some small staging driver fixes for the gpib subsystem to
resolve some reported issues. Included in here are:
- memory leak fixes
- error code fixes
- proper protocol fixes
All of these have been in linux-next for almost 2 weeks now with no
reported issues"
* tag 'staging-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: gpib: Fix device reference leak in fmh_gpib driver
staging: gpib: Return -EINTR on device clear
staging: gpib: Fix sending clear and trigger events
staging: gpib: Fix no EOI on 1 and 2 byte writes
Here are some small tty and serial driver fixes for reported issues.
Included in here are:
- sh-sci serial driver fixes
- 8250_dw and _mtk driver fixes
- sc16is7xx driver bugfix
- new 8250_exar device ids added
All of these have been in linux-next this past week with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small tty and serial driver fixes for reported issues.
Included in here are:
- sh-sci serial driver fixes
- 8250_dw and _mtk driver fixes
- sc16is7xx driver bugfix
- new 8250_exar device ids added
All of these have been in linux-next this past week with no reported
issues"
* tag 'tty-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: 8250_mtk: Enable baud clock and manage in runtime PM
serial: 8250_dw: handle reset control deassert error
dt-bindings: serial: sh-sci: Fix r8a78000 interrupts
serial: sc16is7xx: remove useless enable of enhanced features
serial: 8250_exar: add support for Advantech 2 port card with Device ID 0x0018
tty: serial: sh-sci: fix RSCI FIFO overrun handling
Here are some small USB driver fixes and new device ids for 6.18-rc3.
Included in here are:
- new option serial driver device ids added
- dt bindings fixes for numerous platforms
- xhci bugfixes for many reported regressions
- usbio dependency bugfix
- dwc3 driver fix
- raw-gadget bugfix
All of these have been in linux-next this week with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB driver fixes from Greg KH:
"Here are some small USB driver fixes and new device ids for 6.18-rc3.
Included in here are:
- new option serial driver device ids added
- dt bindings fixes for numerous platforms
- xhci bugfixes for many reported regressions
- usbio dependency bugfix
- dwc3 driver fix
- raw-gadget bugfix
All of these have been in linux-next this week with no reported issues"
* tag 'usb-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
USB: serial: option: add Telit FN920C04 ECM compositions
USB: serial: option: add Quectel RG255C
tcpm: switch check for role_sw device with fw_node
usb/core/quirks: Add Huawei ME906S to wakeup quirk
usb: raw-gadget: do not limit transfer length
USB: serial: option: add UNISOC UIS7720
xhci: dbc: enable back DbC in resume if it was enabled before suspend
xhci: dbc: fix bogus 1024 byte prefix if ttyDBC read races with stall event
usb: xhci-pci: Fix USB2-only root hub registration
dt-bindings: usb: qcom,snps-dwc3: Fix bindings for X1E80100
usb: misc: Add x86 dependency for Intel USBIO driver
dt-bindings: usb: switch: split out ports definition
usb: dwc3: Don't call clk_bulk_disable_unprepare() twice
dt-bindings: usb: dwc3-imx8mp: dma-range is required only for imx8mp
a Clang build
- Make sure a Retbleed mitigation message is printed only when necessary
- Correct the last Zen1 microcode revision for which Entrysign sha256 check is
needed
- Fix a NULL ptr deref when mounting the resctrl fs on a system which supports
assignable counters but where L3 total and local bandwidth monitoring has
been disabled at boot
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Merge tag 'x86_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Remove dead code leftovers after a recent mitigations cleanup which
fail a Clang build
- Make sure a Retbleed mitigation message is printed only when
necessary
- Correct the last Zen1 microcode revision for which Entrysign sha256
check is needed
- Fix a NULL ptr deref when mounting the resctrl fs on a system which
supports assignable counters but where L3 total and local bandwidth
monitoring has been disabled at boot
* tag 'x86_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/bugs: Remove dead code which might prevent from building
x86/bugs: Qualify RETBLEED_INTEL_MSG
x86/microcode: Fix Entrysign revision check for Zen1/Naples
x86,fs/resctrl: Fix NULL pointer dereference with events force-disabled in mbm_event mode
subsystem after a rework
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Merge tag 'irq_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Borislav Petkov:
- Restore the original buslock locking in a couple of places in the irq
core subsystem after a rework
* tag 'irq_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/manage: Add buslock back in to enable_irq()
genirq/manage: Add buslock back in to __disable_irq_nosync()
genirq/chip: Add buslock back in to irq_set_handler()
- Add one more Rust noreturn function to objtool's list
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Merge tag 'objtool_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull objtool fixes from Borislav Petkov:
- Fix x32 build due to wrong format specifier on that sub-arch
- Add one more Rust noreturn function to objtool's list
* tag 'objtool_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
objtool: Fix failure when being compiled on x32 system
objtool/rust: add one more `noreturn` Rust function
throttled otherwise task movement and manipulation would lead to dangling
cfs_rq references and an eventual crash
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Merge tag 'sched_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Borislav Petkov:
- Make sure a CFS runqueue on a throttled hierarchy has its PELT clock
throttled otherwise task movement and manipulation would lead to
dangling cfs_rq references and an eventual crash
* tag 'sched_urgent_for_v6.18_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/fair: Start a cfs_rq on throttled hierarchy with PELT clock throttled
- In Device::parent(), do not make any assumptions on the device
context of the parent device.
- Check visibility before changing ownership of a sysfs attribute
group.
- In topology_parse_cpu_capacity(), replace an incorrect usage of
PTR_ERR_OR_ZERO() with IS_ERR_OR_NULL().
- In devcoredump, fix a circular locking dependency between
struct devcd_entry::mutex and kernfs.
- Do not warn about a pending fw_devlink sync state.
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Merge tag 'driver-core-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core fixes from Danilo Krummrich:
- In Device::parent(), do not make any assumptions on the device
context of the parent device
- Check visibility before changing ownership of a sysfs attribute
group
- In topology_parse_cpu_capacity(), replace an incorrect usage of
PTR_ERR_OR_ZERO() with IS_ERR_OR_NULL()
- In devcoredump, fix a circular locking dependency between
struct devcd_entry::mutex and kernfs
- Do not warn about a pending fw_devlink sync state
* tag 'driver-core-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core:
arch_topology: Fix incorrect error check in topology_parse_cpu_capacity()
rust: device: fix device context of Device::parent()
sysfs: check visibility before changing group attribute ownership
devcoredump: Fix circular locking dependency with devcd->mutex.
driver core: fw_devlink: Don't warn about sync_state() pending
A small collection of FireWire fixes. This includes collections to sparse
and API documentation.
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Merge tag 'firewire-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394
Pull firewire fixes from Takashi Sakamoto:
"A small collection of FireWire fixes. This includes corrections to
sparse and API documentation"
* tag 'firewire-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394:
firewire: init_ohci1394_dma: add missing function parameter documentation
firewire: core: fix __must_hold() annotation
Several RISC-V fixes for v6.18-rc3:
- Close a race during boot between userspace vDSO usage and some
late-initialized vDSO data
- Improve performance on systems with non-CPU-cache-coherent
DMA-capable peripherals by enabling write combining on
pgprot_dmacoherent() allocations
- Add human-readable detail for RISC-V IPI tracing
- Provide more information to zsmalloc on 64-bit RISC-V to improve
allocation
- Silence useless boot messages about CPUs that have been disabled in
DT
- Resolve some compiler and smatch warnings and remove a redundant macro
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Merge tag 'riscv-for-linus-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Paul Walmsley:
- Close a race during boot between userspace vDSO usage and some
late-initialized vDSO data
- Improve performance on systems with non-CPU-cache-coherent
DMA-capable peripherals by enabling write combining on
pgprot_dmacoherent() allocations
- Add human-readable detail for RISC-V IPI tracing
- Provide more information to zsmalloc on 64-bit RISC-V to improve
allocation
- Silence useless boot messages about CPUs that have been disabled in
DT
- Resolve some compiler and smatch warnings and remove a redundant
macro
* tag 'riscv-for-linus-6.18-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
riscv: hwprobe: avoid uninitialized variable use in hwprobe_arch_id()
riscv: cpufeature: avoid uninitialized variable in has_thead_homogeneous_vlenb()
riscv: hwprobe: Fix stale vDSO data for late-initialized keys at boot
riscv: add a forward declaration for cpuinfo_op
RISC-V: Don't print details of CPUs disabled in DT
riscv: Remove the PER_CPU_OFFSET_SHIFT macro
riscv: mm: Define MAX_POSSIBLE_PHYSMEM_BITS for zsmalloc
riscv: Register IPI IRQs with unique names
ACPI: RIMT: Fix unused function warnings when CONFIG_IOMMU_API is disabled
RISC-V: Define pgprot_dmacoherent() for non-coherent devices
Signed-off-by: Carlos Maiolino <cem@kernel.org>
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Merge tag 'xfs-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Carlos Maiolino:
"The main highlight here is a fix for a bug brought in by the removal
of attr2 mount option, where some installations might actually have
'attr2' explicitly configured in fstab preventing system to boot by
not being able to remount the rootfs as RW.
Besides that there are a couple fix to the zonefs implementation,
changing XFS_ONLINE_SCRUB_STATS to depend on DEBUG_FS (was select
before), and some other minor changes"
* tag 'xfs-fixes-6.18-rc3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix locking in xchk_nlinks_collect_dir
xfs: loudly complain about defunct mount options
xfs: always warn about deprecated mount options
xfs: don't set bt_nr_sectors to a negative number
xfs: don't use __GFP_NOFAIL in xfs_init_fs_context
xfs: cache open zone in inode->i_private
xfs: avoid busy loops in GCD
xfs: XFS_ONLINE_SCRUB_STATS should depend on DEBUG_FS
xfs: do not tightly pack-write large files
xfs: Improve CONFIG_XFS_RT Kconfig help
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Merge tag 'v6.18-rc2-smb-server-fixes' of git://git.samba.org/ksmbd
Pull smb server fixes from Steve French:
"smbdirect (RDMA) fixes in order avoid potential submission queue
overflows:
- free transport teardown fix
- credit related fixes (five server related, one client related)"
* tag 'v6.18-rc2-smb-server-fixes' of git://git.samba.org/ksmbd:
smb: server: let free_transport() wait for SMBDIRECT_SOCKET_DISCONNECTED
smb: client: make use of smbdirect_socket.send_io.lcredits.*
smb: server: make use of smbdirect_socket.send_io.lcredits.*
smb: server: simplify sibling_list handling in smb_direct_flush_send_list/send_done
smb: server: smb_direct_disconnect_rdma_connection() already wakes all waiters on error
smb: smbdirect: introduce smbdirect_socket.send_io.lcredits.*
smb: server: allocate enough space for RW WRs and ib_drain_qp()
Clang is not happy with set but unused variable (this is visible
with `make W=1` build:
kernel/sched/sched.h:3744:18: error: variable 'cpumask' set but not used [-Werror,-Wunused-but-set-variable]
It seems like the variable was never used along with the assignment
that does not have side effects as far as I can see. Remove those
altogether.
Fixes: 223baf9d17 ("sched: Fix performance regression introduced by mm_cid")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Eric Biggers <ebiggers@kernel.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
