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Keep blk_next_bio next to the core bio infrastructure.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220124091107.642561-14-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-13-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Only the priv field of rnbd_dev_blk_io is used, so store the value of
that in bio->bi_private directly and remove the entire bio_set overhead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20220124091107.642561-12-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
The memory mapped in process_rdma is contiguous, so there is no need
to loop over bio_add_page. Remove rnbd_bio_map_kern and just open code
the bio allocation and mapping in the caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jack Wang <jinpu.wang@ionons.com>
Tested-by: Jack Wang <jinpu.wang@ionos.com>
Link: https://lore.kernel.org/r/20220124091107.642561-11-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-10-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use blkdev_issue_flush, which uses an on-stack bio instead of an
opencoded version with a bio embedded into struct pool.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-9-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Use blkdev_issue_flush, which uses an on-stack bio instead of an
opencoded version with a bio embedded into struct dm_snapshot.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-8-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Just open code it next to the bio allocations, which saves a few lines
of code, prepares for future changes and allows to remove the duplicate
bi_opf assignment for the bio_clone_fast case in kcryptd_io_read.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-7-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Remove handling of NULL returns from sleeping bio_alloc calls given that
those can't fail.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-6-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bio_alloc will never fail if it is allowed to sleep, so there is no
need for this loop. Also remove the __GFP_HIGH specifier as it doesn't
make sense here given that we'll always fall back to the mempool anyway.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-5-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bio_alloc will never fail when it can sleep. Remove the now simple
bl_alloc_init_bio helper and open code it in the only caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bio_alloc will never fail when it can sleep. Remove the now simple
nilfs_alloc_seg_bio helper and open code it in the only caller.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
open code mpage_alloc in it's two callers and simplify the results
because of the context:
- __mpage_writepage always passes GFP_NOFS and can thus always sleep and
will never get a NULL return from bio_alloc at all.
- do_mpage_readpage can only get a non-sleeping context for readahead
which never sets PF_MEMALLOC and thus doesn't need the retry loop
either.
Both cases will never have __GFP_HIGH set.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220124091107.642561-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
There is no good reason to keep genhd.h separate from the main blkdev.h
header that includes it. So fold the contents of genhd.h into blkdev.h
and remove genhd.h entirely.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220124093913.742411-4-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
No need to have this declaration in a public header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220124093913.742411-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
No need to have these declarations in a public header.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Link: https://lore.kernel.org/r/20220124093913.742411-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Make the legacy dev_t based autoloading optional and add a deprecation
warning. This kind of autoloading has ceased to be useful about 20 years
ago.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220104071647.164918-1-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
- Various fixes to the realtek-rtl driver
- Make the GICv3 ITS driver compile again in !SMP configurations
- Force reset of the GICv3 ITSs at probe time to avoid issues during kexec
- Yet another kfree/bitmap_free conversion
- Various DT updates (Renesas, SiFive)
(from Marc Zyngier)
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Merge tag 'irq_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fixes from Borislav Petkov:
- Drop an unused private data field in the AIC driver
- Various fixes to the realtek-rtl driver
- Make the GICv3 ITS driver compile again in !SMP configurations
- Force reset of the GICv3 ITSs at probe time to avoid issues during kexec
- Yet another kfree/bitmap_free conversion
- Various DT updates (Renesas, SiFive)
* tag 'irq_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
dt-bindings: interrupt-controller: sifive,plic: Group interrupt tuples
dt-bindings: interrupt-controller: sifive,plic: Fix number of interrupts
dt-bindings: irqchip: renesas-irqc: Add R-Car V3U support
irqchip/gic-v3-its: Reset each ITS's BASERn register before probe
irqchip/gic-v3-its: Fix build for !SMP
irqchip/loongson-pch-ms: Use bitmap_free() to free bitmap
irqchip/realtek-rtl: Service all pending interrupts
irqchip/realtek-rtl: Fix off-by-one in routing
irqchip/realtek-rtl: Map control data to virq
irqchip/apple-aic: Drop unused ipi_hwirq field
except the one it belongs to, to avoid list corruption
- Make sure parent events are always woken up to avoid indefinite hangs
in the traced workload
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Merge tag 'perf_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Borislav Petkov:
- Prevent accesses to the per-CPU cgroup context list from another CPU
except the one it belongs to, to avoid list corruption
- Make sure parent events are always woken up to avoid indefinite hangs
in the traced workload
* tag 'perf_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/core: Fix cgroup event list management
perf: Always wake the parent event
set when querying membarrier(2) commands through MEMBARRIER_CMD_QUERY
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Merge tag 'sched_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Borislav Petkov:
"Make sure the membarrier-rseq fence commands are part of the reported
set when querying membarrier(2) commands through MEMBARRIER_CMD_QUERY"
* tag 'sched_urgent_for_v5.17_rc2_p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/membarrier: Fix membarrier-rseq fence command missing from query bitmask
processor inventory unique number
- Allow writing to MCE thresholding sysfs files again - a previous
change had accidentally disabled it and no one noticed. Goes to show how
much is this stuff used
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Merge tag 'x86_urgent_for_v5.17_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Borislav Petkov:
- Add another Intel CPU model to the list of CPUs supporting the
processor inventory unique number
- Allow writing to MCE thresholding sysfs files again - a previous
change had accidentally disabled it and no one noticed. Goes to show
how much is this stuff used
* tag 'x86_urgent_for_v5.17_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/cpu: Add Xeon Icelake-D to list of CPUs that support PPIN
x86/MCE/AMD: Allow thresholding interface updates after init
Merge misc fixes from Andrew Morton:
"12 patches.
Subsystems affected by this patch series: sysctl, binfmt, ia64, mm
(memory-failure, folios, kasan, and psi), selftests, and ocfs2"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
ocfs2: fix a deadlock when commit trans
jbd2: export jbd2_journal_[grab|put]_journal_head
psi: fix "defined but not used" warnings when CONFIG_PROC_FS=n
psi: fix "no previous prototype" warnings when CONFIG_CGROUPS=n
mm, kasan: use compare-exchange operation to set KASAN page tag
kasan: test: fix compatibility with FORTIFY_SOURCE
tools/testing/scatterlist: add missing defines
mm: page->mapping folio->mapping should have the same offset
memory-failure: fetch compound_head after pgmap_pfn_valid()
ia64: make IA64_MCA_RECOVERY bool instead of tristate
binfmt_misc: fix crash when load/unload module
include/linux/sysctl.h: fix register_sysctl_mount_point() return type
commit 6f1b228529 introduces a regression which can deadlock as
follows:
Task1: Task2:
jbd2_journal_commit_transaction ocfs2_test_bg_bit_allocatable
spin_lock(&jh->b_state_lock) jbd_lock_bh_journal_head
__jbd2_journal_remove_checkpoint spin_lock(&jh->b_state_lock)
jbd2_journal_put_journal_head
jbd_lock_bh_journal_head
Task1 and Task2 lock bh->b_state and jh->b_state_lock in different
order, which finally result in a deadlock.
So use jbd2_journal_[grab|put]_journal_head instead in
ocfs2_test_bg_bit_allocatable() to fix it.
Link: https://lkml.kernel.org/r/20220121071205.100648-3-joseph.qi@linux.alibaba.com
Fixes: 6f1b228529 ("ocfs2: fix race between searching chunks and release journal_head from buffer_head")
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reported-by: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Tested-by: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Reported-by: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "ocfs2: fix a deadlock case".
This fixes a deadlock case in ocfs2. We firstly export jbd2 symbols
jbd2_journal_[grab|put]_journal_head as preparation and later use them
in ocfs2 insread of jbd_[lock|unlock]_bh_journal_head to fix the
deadlock.
This patch (of 2):
This exports symbols jbd2_journal_[grab|put]_journal_head, which will be
used outside modules, e.g. ocfs2.
Link: https://lkml.kernel.org/r/20220121071205.100648-2-joseph.qi@linux.alibaba.com
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: Andreas Dilger <adilger.kernel@dilger.ca>
Cc: Gautham Ananthakrishna <gautham.ananthakrishna@oracle.com>
Cc: Saeed Mirzamohammadi <saeed.mirzamohammadi@oracle.com>
Cc: "Theodore Ts'o" <tytso@mit.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When CONFIG_PROC_FS is disabled psi code generates the following
warnings:
kernel/sched/psi.c:1364:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=]
1364 | static const struct proc_ops psi_cpu_proc_ops = {
| ^~~~~~~~~~~~~~~~
kernel/sched/psi.c:1355:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=]
1355 | static const struct proc_ops psi_memory_proc_ops = {
| ^~~~~~~~~~~~~~~~~~~
kernel/sched/psi.c:1346:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=]
1346 | static const struct proc_ops psi_io_proc_ops = {
| ^~~~~~~~~~~~~~~
Make definitions of these structures and related functions conditional
on CONFIG_PROC_FS config.
Link: https://lkml.kernel.org/r/20220119223940.787748-3-surenb@google.com
Fixes: 0e94682b73 ("psi: introduce psi monitor")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
When CONFIG_CGROUPS is disabled psi code generates the following
warnings:
kernel/sched/psi.c:1112:21: warning: no previous prototype for 'psi_trigger_create' [-Wmissing-prototypes]
1112 | struct psi_trigger *psi_trigger_create(struct psi_group *group,
| ^~~~~~~~~~~~~~~~~~
kernel/sched/psi.c:1182:6: warning: no previous prototype for 'psi_trigger_destroy' [-Wmissing-prototypes]
1182 | void psi_trigger_destroy(struct psi_trigger *t)
| ^~~~~~~~~~~~~~~~~~~
kernel/sched/psi.c:1249:10: warning: no previous prototype for 'psi_trigger_poll' [-Wmissing-prototypes]
1249 | __poll_t psi_trigger_poll(void **trigger_ptr,
| ^~~~~~~~~~~~~~~~
Change the declarations of these functions in the header to provide the
prototypes even when they are unused.
Link: https://lkml.kernel.org/r/20220119223940.787748-2-surenb@google.com
Fixes: 0e94682b73 ("psi: introduce psi monitor")
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
It has been reported that the tag setting operation on newly-allocated
pages can cause the page flags to be corrupted when performed
concurrently with other flag updates as a result of the use of
non-atomic operations.
Fix the problem by using a compare-exchange loop to update the tag.
Link: https://lkml.kernel.org/r/20220120020148.1632253-1-pcc@google.com
Link: https://linux-review.googlesource.com/id/I456b24a2b9067d93968d43b4bb3351c0cec63101
Fixes: 2813b9c029 ("kasan, mm, arm64: tag non slab memory allocated via pagealloc")
Signed-off-by: Peter Collingbourne <pcc@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
With CONFIG_FORTIFY_SOURCE enabled, string functions will also perform
dynamic checks using __builtin_object_size(ptr), which when failed will
panic the kernel.
Because the KASAN test deliberately performs out-of-bounds operations,
the kernel panics with FORTIFY_SOURCE, for example:
| kernel BUG at lib/string_helpers.c:910!
| invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
| CPU: 1 PID: 137 Comm: kunit_try_catch Tainted: G B 5.16.0-rc3+ #3
| Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
| RIP: 0010:fortify_panic+0x19/0x1b
| ...
| Call Trace:
| kmalloc_oob_in_memset.cold+0x16/0x16
| ...
Fix it by also hiding `ptr` from the optimizer, which will ensure that
__builtin_object_size() does not return a valid size, preventing
fortified string functions from panicking.
Link: https://lkml.kernel.org/r/20220124160744.1244685-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Reported-by: Nico Pache <npache@redhat.com>
Reviewed-by: Nico Pache <npache@redhat.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Brendan Higgins <brendanhiggins@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The cited commits replaced preemptible with pagefault_disabled and
flush_kernel_dcache_page with flush_dcache_page respectively, hence need
to update the corresponding defines in the test.
scatterlist.c: In function ‘sg_miter_stop’:
scatterlist.c:919:4: warning: implicit declaration of function ‘flush_dcache_page’ [-Wimplicit-function-declaration]
flush_dcache_page(miter->page);
^~~~~~~~~~~~~~~~~
In file included from linux/scatterlist.h:8:0,
from scatterlist.c:9:
scatterlist.c:922:18: warning: implicit declaration of function ‘pagefault_disabled’ [-Wimplicit-function-declaration]
WARN_ON_ONCE(!pagefault_disabled());
^
linux/mm.h:23:25: note: in definition of macro ‘WARN_ON_ONCE’
int __ret_warn_on = !!(condition); \
^~~~~~~~~
Link: https://lkml.kernel.org/r/20220118082105.1737320-1-maorg@nvidia.com
Fixes: 723aca2085 ("mm/scatterlist: replace the !preemptible warning in sg_miter_stop()")
Fixes: 0e84f5dbf8 ("scatterlist: replace flush_kernel_dcache_page with flush_dcache_page")
Signed-off-by: Maor Gottlieb <maorg@nvidia.com>
Tested-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
As with the other members of folio, the offset of page->mapping and
folio->mapping must be the same. The compile-time check was
inadvertently removed during development. Add it back.
[willy@infradead.org: changelog redo]
Link: https://lkml.kernel.org/r/20220104011734.21714-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
memory_failure_dev_pagemap() at the moment assumes base pages (e.g.
dax_lock_page()). For devmap with compound pages fetch the
compound_head in case a tail page memory failure is being handled.
Currently this is a nop, but in the advent of compound pages in
dev_pagemap it allows memory_failure_dev_pagemap() to keep working.
Without this fix memory-failure handling (i.e. MCEs on pmem) with
device-dax configured namespaces will regress (and crash).
Link: https://lkml.kernel.org/r/20211202204422.26777-2-joao.m.martins@oracle.com
Reported-by: Jane Chu <jane.chu@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@nec.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
In linux-next, IA64_MCA_RECOVERY uses the (new) function
make_task_dead(), which is not exported for use by modules. Instead of
exporting it for one user, convert IA64_MCA_RECOVERY to be a bool
Kconfig symbol.
In a config file from "kernel test robot <lkp@intel.com>" for a
different problem, this linker error was exposed when
CONFIG_IA64_MCA_RECOVERY=m.
Fixes this build error:
ERROR: modpost: "make_task_dead" [arch/ia64/kernel/mca_recovery.ko] undefined!
Link: https://lkml.kernel.org/r/20220124213129.29306-1-rdunlap@infradead.org
Fixes: 0e25498f8c ("exit: Add and use make_task_dead.")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
We should unregister the table upon module unload otherwise something
horrible will happen when we load binfmt_misc module again. Also note
that we should keep value returned by register_sysctl_mount_point() and
release it later, otherwise it will leak.
Also, per Christian's comment, to fully restore the old behavior that
won't break userspace the check(binfmt_misc_header) should be
eliminated.
To reproduce:
modprobe binfmt_misc
modprobe -r binfmt_misc
modprobe binfmt_misc
modprobe -r binfmt_misc
modprobe binfmt_misc
resulting in
modprobe: can't load module binfmt_misc (kernel/fs/binfmt_misc.ko): Cannot allocate memory
and an unhappy kernel:
binfmt_misc: Failed to create fs/binfmt_misc sysctl mount point
binfmt_misc: Failed to create fs/binfmt_misc sysctl mount point
BUG: unable to handle page fault for address: fffffbfff8004802
Call Trace:
init_misc_binfmt+0x2d/0x1000 [binfmt_misc]
Link: https://lkml.kernel.org/r/20220124181812.1869535-2-ztong0001@gmail.com
Fixes: 3ba442d533 ("fs: move binfmt_misc sysctl to its own file")
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Co-developed-by: Christian Brauner<brauner@kernel.org>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Iurii Zaikin <yzaikin@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The CONFIG_SYSCTL=n stub returns the wrong type.
Fixes: ee9efac48a ("sysctl: add helper to register a sysctl mount point")
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
- Drop an unused private data field in the AIC driver
- Various fixes to the realtek-rtl driver
- Make the GICv3 ITS driver compile again in !SMP configurations
- Force reset of the GICv3 ITSs at probe time to avoid issues during kexec
- Yet another kfree/bitmap_free conversion
- Various DT updates (Renesas, SiFive)
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Merge tag 'irqchip-fixes-5.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip fixes from Marc Zyngier:
- Drop an unused private data field in the AIC driver
- Various fixes to the realtek-rtl driver
- Make the GICv3 ITS driver compile again in !SMP configurations
- Force reset of the GICv3 ITSs at probe time to avoid issues during kexec
- Yet another kfree/bitmap_free conversion
- Various DT updates (Renesas, SiFive)
Link: https://lore.kernel.org/r/20220128174217.517041-1-maz@kernel.org
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Merge tag 'pci-v5.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull pci fixes from Bjorn Helgaas:
- Fix compilation warnings in new mt7621 driver (Sergio Paracuellos)
- Restore the sysfs "rom" file for VGA shadow ROMs, which was broken
when converting "rom" to be a static attribute (Bjorn Helgaas)
* tag 'pci-v5.17-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI/sysfs: Find shadow ROM before static attribute initialization
PCI: mt7621: Remove unused function pcie_rmw()
PCI: mt7621: Drop of_match_ptr() to avoid unused variable
- fix a bug with hogs not being set-up in gpio-sim when user-space sets the
chip label to an empty string
- include the gpio-sim documentation in the index
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Merge tag 'gpio-fixes-for-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio fixes from Bartosz Golaszewski:
"Two fixes for the gpio-simulator:
- fix a bug with hogs not being set-up in gpio-sim when user-space
sets the chip label to an empty string
- include the gpio-sim documentation in the index"
* tag 'gpio-fixes-for-v5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
gpio: sim: add doc file to index file
gpio: sim: check the label length when setting up device properties
Here are two small char/misc driver fixes for 5.17-rc2 that fix some
reported issues. They include:
- fix up a merge issue in the at25.c driver that ended up
dropping some lines in the driver. The removed lines ended
being needed, so this restores it and the driver works again.
- counter core fix where the wrong error was being returned,
NULL should be the correct error for when memory is gone here,
like the kmalloc() core does.
Both 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 'char-misc-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are two small char/misc driver fixes for 5.17-rc2 that fix some
reported issues. They are:
- fix up a merge issue in the at25.c driver that ended up dropping
some lines in the driver. The removed lines ended being needed, so
this restores it and the driver works again.
- counter core fix where the wrong error was being returned, NULL
should be the correct error for when memory is gone here, like the
kmalloc() core does.
Both of these have been in linux-next this week with no reported
issues"
* tag 'char-misc-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
counter: fix an IS_ERR() vs NULL bug
eeprom: at25: Restore missing allocation
Here are some small bug fixes and reverts for reported problems with the
tty core and drivers. They include:
- revert the fifo use for the 8250 console mode. It caused too
many regressions and problems, and had a bug in it as well.
This is being reworked and should show up in a later -rc1
release, but it's not ready for 5.17
- rpmsg tty race fix
- restore the cyclades.h uapi header file. Turns out a compiler
test suite used it for some unknown reason. Bring it back
just for the parts that are used by the builder test so they
continue to build. No functionality is restored as no one
actually has this hardware anymore, nor is it really tested.
- stm32 driver fixes
- n_gsm flow control fixes
- pl011 driver fix
- rs485 initialization fix
All of these have been in linux-next this week with no reported
problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial driver fixes from Greg KH:
"Here are some small bug fixes and reverts for reported problems with
the tty core and drivers. They include:
- revert the fifo use for the 8250 console mode. It caused too many
regressions and problems, and had a bug in it as well. This is
being reworked and should show up in a later -rc1 release, but it's
not ready for 5.17
- rpmsg tty race fix
- restore the cyclades.h uapi header file. Turns out a compiler test
suite used it for some unknown reason. Bring it back just for the
parts that are used by the builder test so they continue to build.
No functionality is restored as no one actually has this hardware
anymore, nor is it really tested.
- stm32 driver fixes
- n_gsm flow control fixes
- pl011 driver fix
- rs485 initialization fix
All of these have been in linux-next this week with no reported
problems"
* tag 'tty-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
kbuild: remove include/linux/cyclades.h from header file check
serial: core: Initialize rs485 RTS polarity already on probe
serial: pl011: Fix incorrect rs485 RTS polarity on set_mctrl
serial: stm32: fix software flow control transfer
serial: stm32: prevent TDR register overwrite when sending x_char
tty: n_gsm: fix SW flow control encoding/handling
serial: 8250: of: Fix mapped region size when using reg-offset property
tty: rpmsg: Fix race condition releasing tty port
tty: Partially revert the removal of the Cyclades public API
tty: Add support for Brainboxes UC cards.
Revert "tty: serial: Use fifo in 8250 console driver"
Here are some small USB driver fixes for 5.17-rc2 that resolve a number
of reported problems. These include:
- typec driver fixes
- xhci platform driver fixes for suspending
- ulpi core fix
- role.h build fix
- new device ids
- syzbot-reported bugfixes
- gadget driver fixes
- dwc3 driver fixes
- other small fixes
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-5.17-rc2' 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 for 5.17-rc2 that resolve a
number of reported problems. These include:
- typec driver fixes
- xhci platform driver fixes for suspending
- ulpi core fix
- role.h build fix
- new device ids
- syzbot-reported bugfixes
- gadget driver fixes
- dwc3 driver fixes
- other small fixes
All of these have been in linux-next this week with no reported
issues"
* tag 'usb-5.17-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
usb: cdnsp: Fix segmentation fault in cdns_lost_power function
usb: dwc2: gadget: don't try to disable ep0 in dwc2_hsotg_suspend
usb: gadget: at91_udc: fix incorrect print type
usb: dwc3: xilinx: Fix error handling when getting USB3 PHY
usb: dwc3: xilinx: Skip resets and USB3 register settings for USB2.0 mode
usb: xhci-plat: fix crash when suspend if remote wake enable
usb: common: ulpi: Fix crash in ulpi_match()
usb: gadget: f_sourcesink: Fix isoc transfer for USB_SPEED_SUPER_PLUS
ucsi_ccg: Check DEV_INT bit only when starting CCG4
USB: core: Fix hang in usb_kill_urb by adding memory barriers
usb-storage: Add unusual-devs entry for VL817 USB-SATA bridge
usb: typec: tcpm: Do not disconnect when receiving VSAFE0V
usb: typec: tcpm: Do not disconnect while receiving VBUS off
usb: typec: Don't try to register component master without components
usb: typec: Only attempt to link USB ports if there is fwnode
usb: typec: tcpci: don't touch CC line if it's Vconn source
usb: roles: fix include/linux/usb/role.h compile issue
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Merge tag 'block-5.17-2022-01-28' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
- NVMe pull request
- add the IGNORE_DEV_SUBNQN quirk for Intel P4500/P4600 SSDs (Wu
Zheng)
- remove the unneeded ret variable in nvmf_dev_show (Changcheng
Deng)
- Fix for a hang regression introduced with a patch in the merge
window, where low queue depth devices would not always get woken
correctly (Laibin)
- Small series fixing an IO accounting issue with bio backed dm devices
(Mike, Yu)
* tag 'block-5.17-2022-01-28' of git://git.kernel.dk/linux-block:
dm: properly fix redundant bio-based IO accounting
dm: revert partial fix for redundant bio-based IO accounting
block: add bio_start_io_acct_time() to control start_time
blk-mq: Fix wrong wakeup batch configuration which will cause hang
nvme-fabrics: remove the unneeded ret variable in nvmf_dev_show
nvme-pci: add the IGNORE_DEV_SUBNQN quirk for Intel P4500/P4600 SSDs
blk-mq: fix missing blk_account_io_done() in error path
block: fix memory leak in disk_register_independent_access_ranges
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Merge tag 'io_uring-5.17-2022-01-28' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Just two small fixes this time:
- Fix a bug that can lead to node registration taking 1 second, when
it should finish much quicker (Dylan)
- Remove an unused argument from a function (Usama)"
* tag 'io_uring-5.17-2022-01-28' of git://git.kernel.dk/linux-block:
io_uring: remove unused argument from io_rsrc_node_alloc
io_uring: fix bug in slow unregistering of nodes
- Fix VM debug warnings on boot triggered via __set_fixmap().
- Fix a debug warning in the 64-bit Book3S PMU handling code.
- Fix nested guest HFSCR handling with multiple vCPUs on Power9 or later.
- Fix decrementer storm caused by a recent change, seen with some configs.
Thanks to: Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy, Fabiano Rosas, Maxime
Bizon, Nicholas Piggin, Sachin Sant.
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Merge tag 'powerpc-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix VM debug warnings on boot triggered via __set_fixmap().
- Fix a debug warning in the 64-bit Book3S PMU handling code.
- Fix nested guest HFSCR handling with multiple vCPUs on Power9 or
later.
- Fix decrementer storm caused by a recent change, seen with some
configs.
Thanks to Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy,
Fabiano Rosas, Maxime Bizon, Nicholas Piggin, and Sachin Sant.
* tag 'powerpc-5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/64s/interrupt: Fix decrementer storm
KVM: PPC: Book3S HV Nested: Fix nested HFSCR being clobbered with multiple vCPUs
powerpc/perf: Fix power_pmu_disable to call clear_pmi_irq_pending only if PMI is pending
powerpc/fixmap: Fix VM debug warning on unmap
- Errata workarounds for Cortex-A510: broken hardware dirty bit
management, detection code for the TRBE (tracing) bugs with the actual
fixes going in via the CoreSight tree.
- Cortex-X2 errata handling for TRBE (inheriting the workarounds from
Cortex-A710).
- Fix ex_handler_load_unaligned_zeropad() to use the correct struct
members.
- A couple of kselftest fixes for FPSIMD.
- Silence the vdso "no previous prototype" warning.
- Mark start_backtrace() notrace and NOKPROBE_SYMBOL.
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- Errata workarounds for Cortex-A510: broken hardware dirty bit
management, detection code for the TRBE (tracing) bugs with the
actual fixes going in via the CoreSight tree.
- Cortex-X2 errata handling for TRBE (inheriting the workarounds from
Cortex-A710).
- Fix ex_handler_load_unaligned_zeropad() to use the correct struct
members.
- A couple of kselftest fixes for FPSIMD.
- Silence the vdso "no previous prototype" warning.
- Mark start_backtrace() notrace and NOKPROBE_SYMBOL.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: cpufeature: List early Cortex-A510 parts as having broken dbm
kselftest/arm64: Correct logging of FPSIMD register read via ptrace
kselftest/arm64: Skip VL_INHERIT tests for unsupported vector types
arm64: errata: Add detection for TRBE trace data corruption
arm64: errata: Add detection for TRBE invalid prohibited states
arm64: errata: Add detection for TRBE ignored system register writes
arm64: Add Cortex-A510 CPU part definition
arm64: extable: fix load_unaligned_zeropad() reg indices
arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL
arm64: errata: Update ARM64_ERRATUM_[2119858|2224489] with Cortex-X2 ranges
arm64: Add Cortex-X2 CPU part definition
arm64: vdso: Fix "no previous prototype" warning
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Merge tag 'docs-5.17-3' of git://git.lwn.net/linux
Pull documentation fixes from Jonathan Corbet:
"A few documentation fixes for 5.17"
* tag 'docs-5.17-3' of git://git.lwn.net/linux:
docs/vm: Fix typo in *harden*
Documentation: arm: marvell: Extend Avanta list
docs: fix typo in Documentation/kernel-hacking/locking.rst
docs: Hook the RTLA documents into the kernel docs build
Record the start_time for a bio but defer the starting block core's IO
accounting until after IO is submitted using bio_start_io_acct_time().
This approach avoids the need to mess around with any of the
individual IO stats in response to a bio_split() that follows bio
submission.
Reported-by: Bud Brown <bubrown@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: stable@vger.kernel.org
Depends-on: e45c47d1f9 ("block: add bio_start_io_acct_time() to control start_time")
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220128155841.39644-4-snitzer@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
bio_start_io_acct_time() interface is like bio_start_io_acct() that
allows start_time to be passed in. This gives drivers the ability to
defer starting accounting until after IO is issued (but possibily not
entirely due to bio splitting).
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20220128155841.39644-2-snitzer@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
