- 03 Apr, 2023 10 commits
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John Garry authored
The shost->can_queue value is initially used to set per-HW queue context tag depth in the block layer. This ensures that the shost is not sent too many commands which it can deal with. However lowering sdebug_max_queue separately means that we can easily overload the shost, as in the following example: $ cat /sys/bus/pseudo/drivers/scsi_debug/max_queue 192 $ cat /sys/class/scsi_host/host0/can_queue 192 $ echo 100 > /sys/bus/pseudo/drivers/scsi_debug/max_queue $ cat /sys/class/scsi_host/host0/can_queue 192 $ fio --filename=/dev/sda --direct=1 --rw=read --bs=4k --iodepth=256 --runtime=1200 --numjobs=10 --time_based --group_reporting --name=iops-test-job --eta-newline=1 --readonly --ioengine=io_uring --hipri --exitall_on_error iops-test-job: (g=0): rw=read, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=io_uring, iodepth=256 ... fio-3.28 Starting 10 processes [ 111.269885] scsi_io_completion_action: 400 callbacks suppressed [ 111.269885] blk_print_req_error: 400 callbacks suppressed [ 111.269889] I/O error, dev sda, sector 440 op 0x0:(READ) flags 0x1200000 phys_seg 1 prio class 2 [ 111.269892] sd 0:0:0:0: [sda] tag#132 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK cmd_age=0s [ 111.269897] sd 0:0:0:0: [sda] tag#132 CDB: Read(10) 28 00 00 00 01 68 00 00 08 00 [ 111.277058] I/O error, dev sda, sector 360 op 0x0:(READ) flags 0x1200000 phys_seg 1 prio class 2 [...] Ensure that this cannot happen by allowing sdebug_max_queue be modified only when we have no shosts. As such, any shost->can_queue value will match sdebug_max_queue, and sdebug_max_queue cannot be modified separately. Since retired_max_queue is no longer set, remove support. Continue to apply the restriction that sdebug_host_max_queue cannot be modified when sdebug_host_max_queue is set. Adding support for that would mean extra code, and no one has complained about this restriction previously. A command like the following may be used to remove a shost: echo -1 > /sys/bus/pseudo/drivers/scsi_debug/add_host Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-11-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The functions to update ndelay and delay value first check whether we have any in-flight IO for any host. It does this by checking if any tag is used in the global submit queues. We can achieve the same by setting the host as blocked and then ensuring that we have no in-flight commands with scsi_host_busy(). Note that scsi_host_busy() checks SCMD_STATE_INFLIGHT flag, which is only set per command after we ensure that the host is not blocked, i.e. we see more commands active after the check for scsi_host_busy() returns 0. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-10-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
Instead of iterating all deferred commands in the submission queue structures, use blk_mq_tagset_busy_iter(), which is a standard API for this. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-9-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
Instead of iterating all deferred commands in the submission queue structures, use blk_mq_tagset_busy_iter(), which is a standard API for this. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-8-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
Eventually we will drop the sdebug_queue struct as it is not really required, so start with making the sdebug_queued_cmd dynamically allocated for the lifetime of the scsi_cmnd in the driver. As an interim measure, make sdebug_queued_cmd.sd_dp a pointer to struct sdebug_defer. Also keep a value of the index allocated in sdebug_queued_cmd.qc_arr in struct sdebug_queued_cmd. To deal with an races in accessing the scsi cmnd allocated struct sdebug_queued_cmd, add a spinlock for the scsi command in its priv area. Races may be between scheduling a command for completion, aborting a command, and the command actually completing and freeing the struct sdebug_queued_cmd. [mkp: typo fix] Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-7-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The feature to block queues is quite dubious, since it races with in-flight IO. Indeed, it seems unnecessary for block queues for any times we do so. Anyway, to keep the same behaviour, use standard SCSI API to stop IO being sent - scsi_{un}block_requests(). Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-6-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
There is no reason that calls to block_unblock_all_queues() from different context can't race with one another, so protect with the sdebug_host_list_mutex. There's no need for a more fine-grained per shost locking here (and we don't have a per-host lock anyway). Also simplify some touched code in sdebug_change_qdepth(). Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-5-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The shost list lock, sdebug_host_list_lock, is a spinlock. We would only lock in non-atomic context in this driver, so use a mutex instead, which is friendlier if we need to schedule when iterating. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-4-john.g.garry@oracle.comAcked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
In clear_luns_changed_on_target(), we iter all devices for all shosts to conditionally clear the SDEBUG_UA_LUNS_CHANGED flag in the per-device uas_bm. One condition to see whether we clear the flag is to test whether the host for the device under consideration is the same as the matching device's (devip) host. This check will only ever pass for devices for the same shost, so only iter the devices for the matching device shost. We can now drop the spinlock'ing of the sdebug_host_list_lock in the same function. This will allow us to use a mutex instead of the spinlock for the global shost lock, as clear_luns_changed_on_target() could be called in non-blocking context, in scsi_debug_queuecommand() -> make_ua() -> clear_luns_changed_on_target() (which is why required a spinlock). Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-3-john.g.garry@oracle.comAcked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
There is a report that the blktests scsi/004 test for "TASK SET FULL" (TSF) now fails. The condition upon we should issue this TSF is when the sdev queue is full. The check for a full queue has an off-by-1 error. Previously we would increment the number of requests in the queue after testing if the queue would be full, i.e. test if one less than full. Since we now use scsi_device_busy() to count the number of requests in the queue, this would already account for the current request, so fix the test for queue full accordingly. Fixes: 151f0ec9 ("scsi: scsi_debug: Drop sdebug_dev_info.num_in_q") Reported-by: kernel test robot <oliver.sang@intel.com> Link: https://lore.kernel.org/oe-lkp/202303201334.18b30edc-oliver.sang@intel.comSigned-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230327074310.1862889-2-john.g.garry@oracle.comAcked-by: Douglas Gilbert <dgilbert@interlog.com> Tested-by: Yi Zhang <yi.zhang@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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- 17 Mar, 2023 11 commits
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John Garry authored
Currently commands completed via poll mode are not included in the statistics gathering for deferred completions and missed CPUs. Poll mode completions should be treated the same as other deferred completion types, so add poll mode completions to the statistics. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-12-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The command abort feature allows us to test aborting a command which has timed-out. The idea is that for specific commands we just don't call scsi_done() and allow the request to timeout, which ensures SCSI EH kicks-in we try to abort the command. Since commit 4a0c6f43 ("scsi: scsi_debug: Add new defer type for mq_poll") this does not seem to work. The issue is that we clear the sd_dp->aborted flag in schedule_resp() before the completion callback has run. When the completion callback actually runs, it calls scsi_done() as normal as sd_dp->aborted unset. This is all very racy. Fix by not clearing sd_dp->aborted in schedule_resp(). Also move the call to blk_abort_request() from schedule_resp() to sdebug_q_cmd_complete(), which makes the code have a more logical sequence. I also note that this feature only works for commands which are classed as "SDEG_RES_IMMED_MASK", but only practically triggered with prior RW commands. So for my experiment I need to run fio to trigger the error on the "nth" command (see inject_on_this_cmd()), and then run something like sg_sync to queue a command to actually trigger the abort. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-11-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
In schedule_resp(), under certain conditions we check whether the per-device queue is full (num_in_q == queue depth - 1) and we may inject a "task set full" (TSF) error if it is. However how we read num_in_q is racy - many threads may see the same "queue is full" value (and also issue a TSF). There is per-queue locking in reading per-device num_in_q, but that would not help. Replace how we read num_in_q at this location with a call to scsi_device_busy(). Calling scsi_device_busy() is likewise racy (as reading num_in_q), so nothing lost or gained. Calling scsi_device_busy() is also slow as it needs to read all bits in the per-device budget bitmap, but we can live with that since we're just a simulator and it's only under a certain configs which we would see this. Also move the "task set full" print earlier as it would only be called now under this condition. However, previously it may not have been called - like returning early - but keep it simple and always call it. At this point we can drop sdebug_dev_info.num_in_q - it is difficult to maintain properly and adds extra normal case command processing. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-10-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The per-device num_in_q value cannot exceed the device queue depth, so drop the check. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-9-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The check for device pointer for the SCSI command is unnecessary, so drop it. The only caller is scsi_try_host_reset() -> eh_host_reset_handler(), and there that pointer cannot be NULL. Indeed, there is already code later in the same function which does not check the device pointer for the SCSI command. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-8-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The checks for SCSI cmnd, SCSI device, and SCSI host are unnecessary, so drop them. Likewise, drop the NULL check for sdbg_host. The only caller is scsi_try_bus_reset() -> eh_bus_reset_handler(), and there those pointers cannot be NULL. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-7-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The checks for SCSI cmnd, SCSI device, and SCSI host are unnecessary, so drop them. Likewise, drop the NULL check for sdbg_host. The only caller is scsi_try_target_reset() -> eh_target_reset_handler(), and there those pointers cannot be NULL. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-6-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The SCSI cmnd pointer arg would never be NULL, so drop the check. In addition, its SCSI device pointer would never be NULL (so drop that check also). The only caller is scsi_try_bus_device_reset(), and the command and its device pointer could not be NULL when calling eh_device_reset_handler() there. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-5-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
The SCSI cmnd pointer arg would never be NULL, so drop the check. In addition, its SCSI device pointer would never be NULL. The only caller is scsi_send_eh_cmnd() -> scsi_abort_eh_cmnd() -> scsi_try_to_abort_cmd() -> scsi_try_to_abort_cmd(), and in the origin of that chain those pointers cannot be NULL. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-4-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
In sdebug_device_create(), the devip->sdbg_host pointer is needlessly set twice, so stop doing that. Signed-off-by: John Garry <john.g.garry@oracle.com> Acked-by: Douglas Gilbert <dgilbert@interlog.com> Link: https://lore.kernel.org/r/20230313093114.1498305-3-john.g.garry@oracle.comSigned-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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John Garry authored
This driver stores just a pointer to the driver host structure in host->hostdata[]. Most other drivers actually have the driver host structure allocated in host->hostdata[], but this driver is different as we allocate that memory separately before allocating the shost memory. However there is no need to allocate this memory only in host->hostdata[] when we can already look up the driver host structure from shost->dma_dev, so add a macro for this - shost_to_sdebug_host(). Rename to_sdebug_host() -> dev_to_sdebug_host() to avoid ambiguity. Also remove a check for !sdbg_host in find_build_dev_info(), as this cannot be true. Other similar checks will be later removed. Signed-off-by: John Garry <john.g.garry@oracle.com> Link: https://lore.kernel.org/r/20230313093114.1498305-2-john.g.garry@oracle.comAcked-by: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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- 05 Mar, 2023 9 commits
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Linus Torvalds authored
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Linus Torvalds authored
Commit aa47a7c2 ("lib/cpumask: deprecate nr_cpumask_bits") resulted in the cpumask operations potentially becoming hugely less efficient, because suddenly the cpumask was always considered to be variable-sized. The optimization was then later added back in a limited form by commit 6f9c07be ("lib/cpumask: add FORCE_NR_CPUS config option"), but that FORCE_NR_CPUS option is not useful in a generic kernel and more of a special case for embedded situations with fixed hardware. Instead, just re-introduce the optimization, with some changes. Instead of depending on CPUMASK_OFFSTACK being false, and then always using the full constant cpumask width, this introduces three different cpumask "sizes": - the exact size (nr_cpumask_bits) remains identical to nr_cpu_ids. This is used for situations where we should use the exact size. - the "small" size (small_cpumask_bits) is the NR_CPUS constant if it fits in a single word and the bitmap operations thus end up able to trigger the "small_const_nbits()" optimizations. This is used for the operations that have optimized single-word cases that get inlined, notably the bit find and scanning functions. - the "large" size (large_cpumask_bits) is the NR_CPUS constant if it is an sufficiently small constant that makes simple "copy" and "clear" operations more efficient. This is arbitrarily set at four words or less. As a an example of this situation, without this fixed size optimization, cpumask_clear() will generate code like movl nr_cpu_ids(%rip), %edx addq $63, %rdx shrq $3, %rdx andl $-8, %edx callq memset@PLT on x86-64, because it would calculate the "exact" number of longwords that need to be cleared. In contrast, with this patch, using a MAX_CPU of 64 (which is quite a reasonable value to use), the above becomes a single movq $0,cpumask instruction instead, because instead of caring to figure out exactly how many CPU's the system has, it just knows that the cpumask will be a single word and can just clear it all. Note that this does end up tightening the rules a bit from the original version in another way: operations that set bits in the cpumask are now limited to the actual nr_cpu_ids limit, whereas we used to do the nr_cpumask_bits thing almost everywhere in the cpumask code. But if you just clear bits, or scan for bits, we can use the simpler compile-time constants. In the process, remove 'cpumask_complement()' and 'for_each_cpu_not()' which were not useful, and which fundamentally have to be limited to 'nr_cpu_ids'. Better remove them now than have somebody introduce use of them later. Of course, on x86-64 with MAXSMP there is no sane small compile-time constant for the cpumask sizes, and we end up using the actual CPU bits, and will generate the above kind of horrors regardless. Please don't use MAXSMP unless you really expect to have machines with thousands of cores. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds authored
Pull crypto fix from Herbert Xu: "Fix a regression in the caam driver" * tag 'v6.3-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: caam - Fix edesc/iv ordering mixup
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 updates from Thomas Gleixner: "A small set of updates for x86: - Return -EIO instead of success when the certificate buffer for SEV guests is not large enough - Allow STIPB to be enabled with legacy IBSR. Legacy IBRS is cleared on return to userspace for performance reasons, but the leaves user space vulnerable to cross-thread attacks which STIBP prevents. Update the documentation accordingly" * tag 'x86-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: virt/sev-guest: Return -EIO if certificate buffer is not large enough Documentation/hw-vuln: Document the interaction between IBRS and STIBP x86/speculation: Allow enabling STIBP with legacy IBRS
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq updates from Thomas Gleixner: "A set of updates for the interrupt susbsystem: - Prevent possible NULL pointer derefences in irq_data_get_affinity_mask() and irq_domain_create_hierarchy() - Take the per device MSI lock before invoking code which relies on it being hold - Make sure that MSI descriptors are unreferenced before freeing them. This was overlooked when the platform MSI code was converted to use core infrastructure and results in a fals positive warning - Remove dead code in the MSI subsystem - Clarify the documentation for pci_msix_free_irq() - More kobj_type constification" * tag 'irq-urgent-2023-03-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: genirq/msi, platform-msi: Ensure that MSI descriptors are unreferenced genirq/msi: Drop dead domain name assignment irqdomain: Add missing NULL pointer check in irq_domain_create_hierarchy() genirq/irqdesc: Make kobj_type structures constant PCI/MSI: Clarify usage of pci_msix_free_irq() genirq/msi: Take the per-device MSI lock before validating the control structure genirq/ipi: Fix NULL pointer deref in irq_data_get_affinity_mask()
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull vfs update from Al Viro: "Adding Christian Brauner as VFS co-maintainer" * tag 'pull-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: Adding VFS co-maintainer
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsLinus Torvalds authored
Pull VM_FAULT_RETRY fixes from Al Viro: "Some of the page fault handlers do not deal with the following case correctly: - handle_mm_fault() has returned VM_FAULT_RETRY - there is a pending fatal signal - fault had happened in kernel mode Correct action in such case is not "return unconditionally" - fatal signals are handled only upon return to userland and something like copy_to_user() would end up retrying the faulting instruction and triggering the same fault again and again. What we need to do in such case is to make the caller to treat that as failed uaccess attempt - handle exception if there is an exception handler for faulting instruction or oops if there isn't one. Over the years some architectures had been fixed and now are handling that case properly; some still do not. This series should fix the remaining ones. Status: - m68k, riscv, hexagon, parisc: tested/acked by maintainers. - alpha, sparc32, sparc64: tested locally - bug has been reproduced on the unpatched kernel and verified to be fixed by this series. - ia64, microblaze, nios2, openrisc: build, but otherwise completely untested" * tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: openrisc: fix livelock in uaccess nios2: fix livelock in uaccess microblaze: fix livelock in uaccess ia64: fix livelock in uaccess sparc: fix livelock in uaccess alpha: fix livelock in uaccess parisc: fix livelock in uaccess hexagon: fix livelock in uaccess riscv: fix livelock in uaccess m68k: fix livelock in uaccess
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Masahiro Yamada authored
include/linux/compiler-intel.h had no update in the past 3 years. We often forget about the third C compiler to build the kernel. For example, commit a0a12c3e ("asm goto: eradicate CC_HAS_ASM_GOTO") only mentioned GCC and Clang. init/Kconfig defines CC_IS_GCC and CC_IS_CLANG but not CC_IS_ICC, and nobody has reported any issue. I guess the Intel Compiler support is broken, and nobody is caring about it. Harald Arnesen pointed out ICC (classic Intel C/C++ compiler) is deprecated: $ icc -v icc: remark #10441: The Intel(R) C++ Compiler Classic (ICC) is deprecated and will be removed from product release in the second half of 2023. The Intel(R) oneAPI DPC++/C++ Compiler (ICX) is the recommended compiler moving forward. Please transition to use this compiler. Use '-diag-disable=10441' to disable this message. icc version 2021.7.0 (gcc version 12.1.0 compatibility) Arnd Bergmann provided a link to the article, "Intel C/C++ compilers complete adoption of LLVM". lib/zstd/common/compiler.h and lib/zstd/compress/zstd_fast.c were kept untouched for better sync with https://github.com/facebook/zstd Link: https://www.intel.com/content/www/us/en/developer/articles/technical/adoption-of-llvm-complete-icx.htmlSigned-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Al Viro authored
Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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- 04 Mar, 2023 8 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linuxLinus Torvalds authored
Pull more i2c updates from Wolfram Sang: "Some improvements/fixes for the newly added GXP driver and a Kconfig dependency fix" * tag 'i2c-for-6.3-rc1-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: gxp: fix an error code in probe i2c: gxp: return proper error on address NACK i2c: gxp: remove "empty" switch statement i2c: Disable I2C_APPLE when I2C_PASEMI is a builtin
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Linus Torvalds authored
The migration code ends up temporarily stashing information of the wrong type in unused fields of the newly allocated destination folio. That all works fine, but gcc does complain about the pointer type mis-use: mm/migrate.c: In function ‘__migrate_folio_extract’: mm/migrate.c:1050:20: note: randstruct: casting between randomized structure pointer types (ssa): ‘struct anon_vma’ and ‘struct address_space’ 1050 | *anon_vmap = (void *)dst->mapping; | ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ and gcc is actually right to complain since it really doesn't understand that this is a very temporary special case where this is ok. This could be fixed in different ways by just obfuscating the assignment sufficiently that gcc doesn't see what is going on, but the truly "proper C" way to do this is by explicitly using a union. Using unions for type conversions like this is normally hugely ugly and syntactically nasty, but this really is one of the few cases where we want to make it clear that we're not doing type conversion, we're really re-using the value bit-for-bit just using another type. IOW, this should not become a common pattern, but in this one case using that odd union is probably the best way to document to the compiler what is conceptually going on here. [ Side note: there are valid cases where we convert pointers to other pointer types, notably the whole "folio vs page" situation, where the types actually have fundamental commonalities. The fact that the gcc note is limited to just randomized structures means that we don't see equivalent warnings for those cases, but it migth also mean that we miss other cases where we do play these kinds of dodgy games, and this kind of explicit conversion might be a good idea. ] I verified that at least for an allmodconfig build on x86-64, this generates the exact same code, apart from line numbers and assembler comment changes. Fixes: 64c8902e ("migrate_pages: split unmap_and_move() to _unmap() and _move()") Cc: Huang, Ying <ying.huang@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Linus Torvalds authored
Merge tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "17 hotfixes. Eight are for MM and seven are for other parts of the kernel. Seven are cc:stable and eight address post-6.3 issues or were judged unsuitable for -stable backporting" * tag 'mm-hotfixes-stable-2023-03-04-13-12' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: mailmap: map Dikshita Agarwal's old address to his current one mailmap: map Vikash Garodia's old address to his current one fs/cramfs/inode.c: initialize file_ra_state fs: hfsplus: fix UAF issue in hfsplus_put_super panic: fix the panic_print NMI backtrace setting lib: parser: update documentation for match_NUMBER functions kasan, x86: don't rename memintrinsics in uninstrumented files kasan: test: fix test for new meminstrinsic instrumentation kasan: treat meminstrinsic as builtins in uninstrumented files kasan: emit different calls for instrumentable memintrinsics ocfs2: fix non-auto defrag path not working issue ocfs2: fix defrag path triggering jbd2 ASSERT mailmap: map Georgi Djakov's old Linaro address to his current one mm/hwpoison: convert TTU_IGNORE_HWPOISON to TTU_HWPOISON lib/zlib: DFLTCC deflate does not write all available bits for Z_NO_FLUSH mm/damon/paddr: fix missing folio_put() mm/mremap: fix dup_anon_vma() in vma_merge() case 4
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git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linuxLinus Torvalds authored
Pull powerpc fixes from Michael Ellerman: - Drop orphaned VAS MAINTAINERS entry - Fix build errors with clang and KCSAN - Avoid build errors seen with LD_DEAD_CODE_DATA_ELIMINATION together with recordmcount Thanks to Nathan Chancellor. * tag 'powerpc-6.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc: Avoid dead code/data elimination when using recordmcount powerpc/vmlinux.lds: Add .text.asan/tsan sections powerpc: Drop orphaned VAS MAINTAINERS entry
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git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/soundLinus Torvalds authored
Pull sound fixes from Takashi Iwai: "A collection of various small fixes that have been gathered since the last PR. The majority of changes are for ASoC, and there is a small change in ASoC PCM core, but the rest are all for driver- specific fixes / quirks / updates" * tag 'sound-fix-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (32 commits) ALSA: ice1712: Delete unreachable code in aureon_add_controls() ALSA: ice1712: Do not left ice->gpio_mutex locked in aureon_add_controls() ALSA: hda/realtek: Add quirk for HP EliteDesk 800 G6 Tower PC ALSA: hda/realtek: Improve support for Dell Precision 3260 ASoC: mediatek: mt8195: add missing initialization ASoC: mediatek: mt8188: add missing initialization ASoC: amd: yc: Add DMI entries to support HP OMEN 16-n0xxx (8A43) ASoC: zl38060 add gpiolib dependency ASoC: sam9g20ek: Disable capture unless building with microphone input ASoC: mt8192: Fix range for sidetone positive gain ASoC: mt8192: Report an error if when an invalid sidetone gain is written ASoC: mt8192: Fix event generation for controls ASoC: mt8192: Remove spammy log messages ASoC: mchp-pdmc: fix poc noise at capture startup ASoC: dt-bindings: sama7g5-pdmc: add microchip,startup-delay-us binding ASoC: soc-pcm: add option to start DMA after DAI ASoC: mt8183: Fix event generation for I2S DAI operations ASoC: mt8183: Remove spammy logging from I2S DAI driver ASoC: mt6358: Remove undefined HPx Mux enumeration values ASoC: mt6358: Validate Wake on Voice 2 writes ...
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git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supplyLinus Torvalds authored
Pull more power supply updates from Sebastian Reichel: - Fix DT binding for Richtek RT9467 - Fix a NULL pointer check in the power-supply core - Document meaning of absent "present" property * tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply: dt-bindings: power: supply: Revise Richtek RT9467 compatible name ABI: testing: sysfs-class-power: Document absence of "present" property power: supply: fix null pointer check order in __power_supply_register
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull more cifs updates from Steve French: - xfstest generic/208 fix (memory leak) - minor netfs fix (to address smatch warning) - a DFS fix for stable - a reconnect race fix - two multichannel fixes - RDMA (smbdirect) fix - two additional writeback fixes from David * tag '6.3-rc-smb3-client-fixes-part2' of git://git.samba.org/sfrench/cifs-2.6: cifs: Fix memory leak in direct I/O cifs: prevent data race in cifs_reconnect_tcon() cifs: improve checking of DFS links over STATUS_OBJECT_NAME_INVALID iov: Fix netfs_extract_user_to_sg() cifs: Fix cifs_write_back_from_locked_folio() cifs: reuse cifs_match_ipaddr for comparison of dstaddr too cifs: match even the scope id for ipv6 addresses cifs: Fix an uninitialised variable cifs: Add some missing xas_retry() calls
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Linus Torvalds authored
The usermodehelper code uses two fake pointers for the two capability cases: CAP_BSET for reading and writing 'usermodehelper_bset', and CAP_PI to read and write 'usermodehelper_inheritable'. This seems to be a completely unnecessary indirection, since we could instead just use the pointers themselves, and never have to do any "if this then that" kind of logic. So just get rid of the fake pointer values, and use the real pointer values instead. Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Christoph Hellwig <hch@lst.de> Cc: Kees Cook <keescook@chromium.org> Cc: Iurii Zaikin <yzaikin@google.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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- 03 Mar, 2023 2 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linuxLinus Torvalds authored
Pull coccinelle updates from Julia Lawall: "Changes in make coccicheck and improve a semantic patch This makes a couple of changes in make coccicheck related to shell commands. It also updates the api/atomic_as_refcounter semantic patch to include WARNING in the output message, as done in other cases" * tag 'cocci-for-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/jlawall/linux: scripts: coccicheck: Use /usr/bin/env scripts: coccicheck: Avoid warning about spurious escape coccinelle: api/atomic_as_refcounter: include message type in output
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https://github.com/Rust-for-Linux/linuxLinus Torvalds authored
Pull Rust fix from Miguel Ojeda: "A single build error fix: there was a change during the merge window to a C header parsed by the Rust bindings generator, introducing a type that it does not handle well. The fix tells the generator to treat the type as opaque (for now)" * tag 'rust-fixes-6.3-rc1' of https://github.com/Rust-for-Linux/linux: rust: bindgen: Add `alt_instr` as opaque type
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