- 12 Nov, 2019 9 commits
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Tejun Heo authored
The current kernfs exportfs implementation uses the generic_fh_*() helpers and FILEID_INO32_GEN[_PARENT] which limits ino to 32bits. Let's implement custom exportfs operations and fid type to remove the restriction. * FILEID_KERNFS is a single u64 value whose content is kernfs_node->id. This is the only native fid type. * For backward compatibility with blk_log_action() path which exposes (ino,gen) pairs which userland assembles into FILEID_INO32_GEN keys, combine the generic keys into 64bit IDs in the same order. Signed-off-by:
Tejun Heo <tj@kernel.org> Reviewed-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Namhyung Kim <namhyung@kernel.org>
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Tejun Heo authored
kernfs_find_and_get_node_by_ino() looks the kernfs_node matching the specified ino. On top of that, kernfs_get_node_by_id() and kernfs_fh_get_inode() implement full ID matching by testing the rest of ID. On surface, confusingly, the two are slightly different in that the latter uses 0 gen as wildcard while the former doesn't - does it mean that the latter can't uniquely identify inodes w/ 0 gen? In practice, this is a distinction without a difference because generation number starts at 1. There are no actual IDs with 0 gen, so it can always safely used as wildcard. Let's simplify the code by renaming kernfs_find_and_get_node_by_ino() to kernfs_find_and_get_node_by_id(), moving all lookup logics into it, and removing now unnecessary kernfs_get_node_by_id(). Signed-off-by:
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Tejun Heo authored
kernfs_node->id is currently a union kernfs_node_id which represents either a 32bit (ino, gen) pair or u64 value. I can't see much value in the usage of the union - all that's needed is a 64bit ID which the current code is already limited to. Using a union makes the code unnecessarily complicated and prevents using 64bit ino without adding practical benefits. This patch drops union kernfs_node_id and makes kernfs_node->id a u64. ino is stored in the lower 32bits and gen upper. Accessors - kernfs[_id]_ino() and kernfs[_id]_gen() - are added to retrieve the ino and gen. This simplifies ID handling less cumbersome and will allow using 64bit inos on supported archs. This patch doesn't make any functional changes. Signed-off-by:
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Tejun Heo authored
kernfs node can be created in two separate steps - allocation and activation. This is used to make kernfs nodes visible only after the internal states attached to the node are fully initialized. kernfs_find_and_get_node_by_id() currently allows lookups of nodes which aren't activated yet and thus can expose nodes are which are still being prepped by kernfs users. Fix it by disallowing lookups of nodes which aren't activated yet. kernfs_find_and_get_node_by_ino() Signed-off-by:
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Tejun Heo authored
kernfs_find_and_get_node_by_ino() uses RCU protection. It's currently a bit buggy because it can look up a node which hasn't been activated yet and thus may end up exposing a node that the kernfs user is still prepping. While it can be fixed by pushing it further in the current direction, it's already complicated and isn't clear whether the complexity is justified. The main use of kernfs_find_and_get_node_by_ino() is for exportfs operations. They aren't super hot and all the follow-up operations (e.g. mapping to path) use normal locking anyway. Let's switch to a dumber locking scheme and protect the lookup with kernfs_idr_lock. Signed-off-by:
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Tejun Heo authored
netprio uses cgroup ID to index the priority mapping table. This is currently okay as cgroup IDs are allocated using idr and packed. However, cgroup IDs will be changed to use full 64bit range and won't be packed making this impractical. netprio doesn't care what type of IDs it uses as long as they can identify the controller instances and are packed. Let's switch to css IDs instead of cgroup IDs. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Reviewed-by:
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Tejun Heo authored
Writeback TPs currently use mix of 32 and 64bits for inos. This isn't currently broken because only cgroup inos are using 32bits and they're limited to 32bits. cgroup inos will make use of 64bits. Let's uniformly use ino_t. While at it, switch the default cgroup ino value used when cgroup is disabled to 1 instead of -1U as root cgroup always uses ino 1. Signed-off-by:
Jan Kara <jack@suse.cz> Reviewed-by:
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Tejun Heo authored
When the 32bit ino wraps around, kernfs increments the generation number to distinguish reused ino instances. The wrap-around detection tests whether the allocated ino is lower than what the cursor but the cursor is pointing to the next ino to allocate so the condition never triggers. Fix it by remembering the last ino and comparing against that. Signed-off-by:
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Hewenliang authored
It is necessary to set fd to -1 when inotify_add_watch() fails in cg_prepare_for_wait. Otherwise the fd which has been closed in cg_prepare_for_wait may be misused in other functions such as cg_enter_and_wait_for_frozen and cg_freeze_wait. Fixes: 5313bfe4 ("selftests: cgroup: add freezer controller self-tests") Signed-off-by:
Hewenliang <hewenliang4@huawei.com> Signed-off-by:
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- 07 Nov, 2019 1 commit
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Honglei Wang authored
It's not necessary to adjust the task state and revisit the state of source and destination cgroups if the cgroups are not in freeze state and the task itself is not frozen. And in this scenario, it wakes up the task who's not supposed to be ready to run. Don't do the unnecessary task state adjustment can help stop waking up the task without a reason. Signed-off-by:
Honglei Wang <honglei.wang@oracle.com> Acked-by:
Roman Gushchin <guro@fb.com> Signed-off-by:
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- 06 Nov, 2019 1 commit
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Tejun Heo authored
cgroup->bstat_pending is used to determine the base stat delta to propagate to the parent. While correct, this is different from how percpu delta is determined for no good reason and the inconsistency makes the code more difficult to understand. This patch makes parent propagation delta calculation use the same method as percpu to global propagation. * cgroup_base_stat_accumulate() is renamed to cgroup_base_stat_add() and cgroup_base_stat_sub() is added. * percpu propagation calculation is updated to use the above helpers. * cgroup->bstat_pending is replaced with cgroup->last_bstat and updated to use the same calculation as percpu propagation. Signed-off-by:
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- 25 Oct, 2019 1 commit
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Tejun Heo authored
cgroup_enable_task_cg_lists() is used to lazyily initialize task cgroup associations on the first use to reduce fork / exit overheads on systems which don't use cgroup. Unfortunately, locking around it has never been actually correct and its value is dubious given how the vast majority of systems use cgroup right away from boot. This patch removes the optimization. For now, replace the cg_list based branches with WARN_ON_ONCE()'s to be on the safe side. We can simplify the logic further in the future. Signed-off-by:
Oleg Nesterov <oleg@redhat.com> Signed-off-by:
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- 24 Oct, 2019 1 commit
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Aleksa Sarai authored
Because pids->limit can be changed concurrently (but we don't want to take a lock because it would be needlessly expensive), use atomic64_ts instead. Fixes: commit 49b786ea ("cgroup: implement the PIDs subsystem") Cc: stable@vger.kernel.org # v4.3+ Signed-off-by:
Aleksa Sarai <cyphar@cyphar.com> Signed-off-by:
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- 07 Oct, 2019 6 commits
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Michal Koutný authored
test_core tests various cgroup creation/removal and task migration paths. Run the tests repeatedly with interfering noise (for lockdep checks). Currently, forking noise and subsystem enabled/disabled switching are the implemented noises. Signed-off-by:
Michal Koutný <mkoutny@suse.com> Signed-off-by:
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Michal Koutný authored
Add two new tests that verify that thread and threadgroup migrations work as expected. Signed-off-by:
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Michal Koutný authored
Simplify task migration by being oblivious about its PID during migration. This allows to easily migrate individual threads as well. This change brings no functional change and prepares grounds for thread granularity migrating tests. Signed-off-by:
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Michal Koutný authored
There are reports of users who use thread migrations between cgroups and they report performance drop after d59cfc09 ("sched, cgroup: replace signal_struct->group_rwsem with a global percpu_rwsem"). The effect is pronounced on machines with more CPUs. The migration is affected by forking noise happening in the background, after the mentioned commit a migrating thread must wait for all (forking) processes on the system, not only of its threadgroup. There are several places that need to synchronize with migration: a) do_exit, b) de_thread, c) copy_process, d) cgroup_update_dfl_csses, e) parallel migration (cgroup_{proc,thread}s_write). In the case of self-migrating thread, we relax the synchronization on cgroup_threadgroup_rwsem to avoid the cost of waiting. d) and e) are excluded with cgroup_mutex, c) does not matter in case of single thread migration and the executing thread cannot exec(2) or exit(2) while it is writing into cgroup.threads. In case of do_exit because of signal delivery, we either exit before the migration or finish the migration (of not yet PF_EXITING thread) and die afterwards. This patch handles only the case of self-migration by writing "0" into cgroup.threads. For simplicity, we always take cgroup_threadgroup_rwsem with numeric PIDs. This change improves migration dependent workload performance similar to per-signal_struct state. Signed-off-by:
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Michal Koutný authored
We no longer take cgroup_mutex in cgroup_exit and the exiting tasks are not moved to init_css_set, reflect that in several comments to prevent confusion. Signed-off-by:
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Miaohe Lin authored
Like commit 13d82fb7 ("cgroup: short-circuit cset_cgroup_from_root() on the default hierarchy"), short-circuit current_cgns_cgroup_from_root() on the default hierarchy. Signed-off-by:
Miaohe Lin <linmiaohe@huawei.com> Signed-off-by:
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- 06 Oct, 2019 4 commits
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Linus Torvalds authored
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Linus Torvalds authored
In commit 4ed28639 ("fs, elf: drop MAP_FIXED usage from elf_map") we changed elf to use MAP_FIXED_NOREPLACE instead of MAP_FIXED for the executable mappings. Then, people reported that it broke some binaries that had overlapping segments from the same file, and commit ad55eac7 ("elf: enforce MAP_FIXED on overlaying elf segments") re-instated MAP_FIXED for some overlaying elf segment cases. But only some - despite the summary line of that commit, it only did it when it also does a temporary brk vma for one obvious overlapping case. Now Russell King reports another overlapping case with old 32-bit x86 binaries, which doesn't trigger that limited case. End result: we had better just drop MAP_FIXED_NOREPLACE entirely, and go back to MAP_FIXED. Yes, it's a sign of old binaries generated with old tool-chains, but we do pride ourselves on not breaking existing setups. This still leaves MAP_FIXED_NOREPLACE in place for the load_elf_interp() and the old load_elf_library() use-cases, because nobody has reported breakage for those. Yet. Note that in all the cases seen so far, the overlapping elf sections seem to be just re-mapping of the same executable with different section attributes. We could possibly introduce a new MAP_FIXED_NOFILECHANGE flag or similar, which acts like NOREPLACE, but allows just remapping the same executable file using different protection flags. It's not clear that would make a huge difference to anything, but if people really hate that "elf remaps over previous maps" behavior, maybe at least a more limited form of remapping would alleviate some concerns. Alternatively, we should take a look at our elf_map() logic to see if we end up not mapping things properly the first time. In the meantime, this is the minimal "don't do that then" patch while people hopefully think about it more. Reported-by:
Russell King <linux@armlinux.org.uk> Fixes: 4ed28639 ("fs, elf: drop MAP_FIXED usage from elf_map") Fixes: ad55eac7 ("elf: enforce MAP_FIXED on overlaying elf segments") Cc: Michal Hocko <mhocko@suse.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org>
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git://git.infradead.org/users/hch/dma-mappingLinus Torvalds authored
Pull dma-mapping regression fix from Christoph Hellwig: "Revert an incorret hunk from a patch that caused problems on various arm boards (Andrey Smirnov)" * tag 'dma-mapping-5.4-1' of git://git.infradead.org/users/hch/dma-mapping: dma-mapping: fix false positive warnings in dma_common_free_remap()
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git://git.kernel.org/pub/scm/linux/kernel/git/soc/socLinus Torvalds authored
Pull ARM SoC fixes from Olof Johansson: "A few fixes this time around: - Fixup of some clock specifications for DRA7 (device-tree fix) - Removal of some dead/legacy CPU OPP/PM code for OMAP that throws warnings at boot - A few more minor fixups for OMAPs, most around display - Enable STM32 QSPI as =y since their rootfs sometimes comes from there - Switch CONFIG_REMOTEPROC to =y since it went from tristate to bool - Fix of thermal zone definition for ux500 (5.4 regression)" * tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: ARM: multi_v7_defconfig: Fix SPI_STM32_QSPI support ARM: dts: ux500: Fix up the CPU thermal zone arm64/ARM: configs: Change CONFIG_REMOTEPROC from m to y ARM: dts: am4372: Set memory bandwidth limit for DISPC ARM: OMAP2+: Fix warnings with broken omap2_set_init_voltage() ARM: OMAP2+: Add missing LCDC midlemode for am335x ARM: OMAP2+: Fix missing reset done flag for am3 and am43 ARM: dts: Fix gpio0 flags for am335x-icev2 ARM: omap2plus_defconfig: Enable more droid4 devices as loadable modules ARM: omap2plus_defconfig: Enable DRM_TI_TFP410 DTS: ARM: gta04: introduce legacy spi-cs-high to make display work again ARM: dts: Fix wrong clocks for dra7 mcasp clk: ti: dra7: Fix mcasp8 clock bits
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- 05 Oct, 2019 17 commits
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - remove unneeded ar-option and KBUILD_ARFLAGS - remove long-deprecated SUBDIRS - fix modpost to suppress false-positive warnings for UML builds - fix namespace.pl to handle relative paths to ${objtree}, ${srctree} - make setlocalversion work for /bin/sh - make header archive reproducible - fix some Makefiles and documents * tag 'kbuild-fixes-v5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kheaders: make headers archive reproducible kbuild: update compile-test header list for v5.4-rc2 kbuild: two minor updates for Documentation/kbuild/modules.rst scripts/setlocalversion: clear local variable to make it work for sh namespace: fix namespace.pl script to support relative paths video/logo: do not generate unneeded logo C files video/logo: remove unneeded *.o pattern from clean-files integrity: remove pointless subdir-$(CONFIG_...) integrity: remove unneeded, broken attempt to add -fshort-wchar modpost: fix static EXPORT_SYMBOL warnings for UML build kbuild: correct formatting of header in kbuild module docs kbuild: remove SUBDIRS support kbuild: remove ar-option and KBUILD_ARFLAGS
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Twelve patches mostly small but obvious fixes or cosmetic but small updates" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: qla2xxx: Fix Nport ID display value scsi: qla2xxx: Fix N2N link up fail scsi: qla2xxx: Fix N2N link reset scsi: qla2xxx: Optimize NPIV tear down process scsi: qla2xxx: Fix stale mem access on driver unload scsi: qla2xxx: Fix unbound sleep in fcport delete path. scsi: qla2xxx: Silence fwdump template message scsi: hisi_sas: Make three functions static scsi: megaraid: disable device when probe failed after enabled device scsi: storvsc: setup 1:1 mapping between hardware queue and CPU queue scsi: qedf: Remove always false 'tmp_prio < 0' statement scsi: ufs: skip shutdown if hba is not powered scsi: bnx2fc: Handle scope bits when array returns BUSY or TSF
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Linus Torvalds authored
This makes getdents() and getdents64() do sanity checking on the pathname that it gives to user space. And to mitigate the performance impact of that, it first cleans up the way it does the user copying, so that the code avoids doing the SMAP/PAN updates between each part of the dirent structure write. I really wanted to do this during the merge window, but didn't have time. The conversion of filldir to unsafe_put_user() is something I've had around for years now in a private branch, but the extra pathname checking finally made me clean it up to the point where it is mergable. It's worth noting that the filename validity checking really should be a bit smarter: it would be much better to delay the error reporting until the end of the readdir, so that non-corrupted filenames are still returned. But that involves bigger changes, so let's see if anybody actually hits the corrupt directory entry case before worrying about it further. * branch 'readdir': Make filldir[64]() verify the directory entry filename is valid Convert filldir[64]() from __put_user() to unsafe_put_user()
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Linus Torvalds authored
This has been discussed several times, and now filesystem people are talking about doing it individually at the filesystem layer, so head that off at the pass and just do it in getdents{64}(). This is partially based on a patch by Jann Horn, but checks for NUL bytes as well, and somewhat simplified. There's also commentary about how it might be better if invalid names due to filesystem corruption don't cause an immediate failure, but only an error at the end of the readdir(), so that people can still see the filenames that are ok. There's also been discussion about just how much POSIX strictly speaking requires this since it's about filesystem corruption. It's really more "protect user space from bad behavior" as pointed out by Jann. But since Eric Biederman looked up the POSIX wording, here it is for context: "From readdir: The readdir() function shall return a pointer to a structure representing the directory entry at the current position in the directory stream specified by the argument dirp, and position the directory stream at the next entry. It shall return a null pointer upon reaching the end of the directory stream. The structure dirent defined in the <dirent.h> header describes a directory entry. From definitions: 3.129 Directory Entry (or Link) An object that associates a filename with a file. Several directory entries can associate names with the same file. ... 3.169 Filename A name consisting of 1 to {NAME_MAX} bytes used to name a file. The characters composing the name may be selected from the set of all character values excluding the slash character and the null byte. The filenames dot and dot-dot have special meaning. A filename is sometimes referred to as a 'pathname component'." Note that I didn't bother adding the checks to any legacy interfaces that nobody uses. Also note that if this ends up being noticeable as a performance regression, we can fix that to do a much more optimized model that checks for both NUL and '/' at the same time one word at a time. We haven't really tended to optimize 'memchr()', and it only checks for one pattern at a time anyway, and we really _should_ check for NUL too (but see the comment about "soft errors" in the code about why it currently only checks for '/') See the CONFIG_DCACHE_WORD_ACCESS case of hash_name() for how the name lookup code looks for pathname terminating characters in parallel. Link: https://lore.kernel.org/lkml/20190118161440.220134-2-jannh@google.com/ Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Jann Horn <jannh@google.com> Cc: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: -
Linus Torvalds authored
We really should avoid the "__{get,put}_user()" functions entirely, because they can easily be mis-used and the original intent of being used for simple direct user accesses no longer holds in a post-SMAP/PAN world. Manually optimizing away the user access range check makes no sense any more, when the range check is generally much cheaper than the "enable user accesses" code that the __{get,put}_user() functions still need. So instead of __put_user(), use the unsafe_put_user() interface with user_access_{begin,end}() that really does generate better code these days, and which is generally a nicer interface. Under some loads, the multiple user writes that filldir() does are actually quite noticeable. This also makes the dirent name copy use unsafe_put_user() with a couple of macros. We do not want to make function calls with SMAP/PAN disabled, and the code this generates is quite good when the architecture uses "asm goto" for unsafe_put_user() like x86 does. Note that this doesn't bother with the legacy cases. Nobody should use them anyway, so performance doesn't really matter there. Signed-off-by: -
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/netLinus Torvalds authored
Pull networking fixes from David Miller: 1) Fix ieeeu02154 atusb driver use-after-free, from Johan Hovold. 2) Need to validate TCA_CBQ_WRROPT netlink attributes, from Eric Dumazet. 3) txq null deref in mac80211, from Miaoqing Pan. 4) ionic driver needs to select NET_DEVLINK, from Arnd Bergmann. 5) Need to disable bh during nft_connlimit GC, from Pablo Neira Ayuso. 6) Avoid division by zero in taprio scheduler, from Vladimir Oltean. 7) Various xgmac fixes in stmmac driver from Jose Abreu. 8) Avoid 64-bit division in mlx5 leading to link errors on 32-bit from Michal Kubecek. 9) Fix bad VLAN check in rtl8366 DSA driver, from Linus Walleij. 10) Fix sleep while atomic in sja1105, from Vladimir Oltean. 11) Suspend/resume deadlock in stmmac, from Thierry Reding. 12) Various UDP GSO fixes from Josh Hunt. 13) Fix slab out of bounds access in tcp_zerocopy_receive(), from Eric Dumazet. 14) Fix OOPS in __ipv6_ifa_notify(), from David Ahern. 15) Memory leak in NFC's llcp_sock_bind, from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (72 commits) selftests/net: add nettest to .gitignore net: qlogic: Fix memory leak in ql_alloc_large_buffers nfc: fix memory leak in llcp_sock_bind() sch_dsmark: fix potential NULL deref in dsmark_init() net: phy: at803x: use operating parameters from PHY-specific status net: phy: extract pause mode net: phy: extract link partner advertisement reading net: phy: fix write to mii-ctrl1000 register ipv6: Handle missing host route in __ipv6_ifa_notify net: phy: allow for reset line to be tied to a sleepy GPIO controller net: ipv4: avoid mixed n_redirects and rate_tokens usage r8152: Set macpassthru in reset_resume callback cxgb4:Fix out-of-bounds MSI-X info array access Revert "ipv6: Handle race in addrconf_dad_work" net: make sock_prot_memory_pressure() return "const char *" rxrpc: Fix rxrpc_recvmsg tracepoint qmi_wwan: add support for Cinterion CLS8 devices tcp: fix slab-out-of-bounds in tcp_zerocopy_receive() lib: textsearch: fix escapes in example code udp: only do GSO if # of segs > 1 ... -
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull s390 fixes from Vasily Gorbik: - defconfig updates - Fix build errors with CC_OPTIMIZE_FOR_SIZE due to usage of "i" constraint for function arguments. Two kvm changes acked-by Christian Borntraeger. - Fix -Wunused-but-set-variable warnings in mm code. - Avoid a constant misuse in qdio. - Handle a case when cpumf is temporarily unavailable. * tag 's390-5.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: KVM: s390: mark __insn32_query() as __always_inline KVM: s390: fix __insn32_query() inline assembly s390: update defconfigs s390/pci: mark function(s) __always_inline s390/mm: mark function(s) __always_inline s390/jump_label: mark function(s) __always_inline s390/cpu_mf: mark function(s) __always_inline s390/atomic,bitops: mark function(s) __always_inline s390/mm: fix -Wunused-but-set-variable warnings s390: mark __cpacf_query() as __always_inline s390/qdio: clarify size of the QIB parm area s390/cpumf: Fix indentation in sampling device driver s390/cpumsf: Check for CPU Measurement sampling s390/cpumf: Use consistant debug print format
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Heiko Carstens authored
__insn32_query() will not compile if the compiler decides to not inline it, since it contains an inline assembly with an "i" constraint with variable contents. Acked-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Vasily Gorbik <gor@linux.ibm.com>
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Heiko Carstens authored
The inline assembly constraints of __insn32_query() tell the compiler that only the first byte of "query" is being written to. Intended was probably that 32 bytes are written to. Fix and simplify the code and just use a "memory" clobber. Fixes: d6681397 ("KVM: s390: provide query function for instructions returning 32 byte") Cc: stable@vger.kernel.org # v5.2+ Acked-by:
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Andrey Smirnov authored
Commit 5cf45379 ("dma-mapping: introduce a dma_common_find_pages helper") changed invalid input check in dma_common_free_remap() from: if (!area || !area->flags != VM_DMA_COHERENT) to if (!area || !area->flags != VM_DMA_COHERENT || !area->pages) which seem to produce false positives for memory obtained via dma_common_contiguous_remap() This triggers the following warning message when doing "reboot" on ZII VF610 Dev Board Rev B: WARNING: CPU: 0 PID: 1 at kernel/dma/remap.c:112 dma_common_free_remap+0x88/0x8c trying to free invalid coherent area: 9ef82980 Modules linked in: CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.3.0-rc6-next-20190820 #119 Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) Backtrace: [<8010d1ec>] (dump_backtrace) from [<8010d588>] (show_stack+0x20/0x24) r7:8015ed78 r6:00000009 r5:00000000 r4:9f4d9b14 [<8010d568>] (show_stack) from [<8077e3f0>] (dump_stack+0x24/0x28) [<8077e3cc>] (dump_stack) from [<801197a0>] (__warn.part.3+0xcc/0xe4) [<801196d4>] (__warn.part.3) from [<80119830>] (warn_slowpath_fmt+0x78/0x94) r6:00000070 r5:808e540c r4:81c03048 [<801197bc>] (warn_slowpath_fmt) from [<8015ed78>] (dma_common_free_remap+0x88/0x8c) r3:9ef82980 r2:808e53e0 r7:00001000 r6:a0b1e000 r5:a0b1e000 r4:00001000 [<8015ecf0>] (dma_common_free_remap) from [<8010fa9c>] (remap_allocator_free+0x60/0x68) r5:81c03048 r4:9f4d9b78 [<8010fa3c>] (remap_allocator_free) from [<801100d0>] (__arm_dma_free.constprop.3+0xf8/0x148) r5:81c03048 r4:9ef82900 [<8010ffd8>] (__arm_dma_free.constprop.3) from [<80110144>] (arm_dma_free+0x24/0x2c) r5:9f563410 r4:80110120 [<80110120>] (arm_dma_free) from [<8015d80c>] (dma_free_attrs+0xa0/0xdc) [<8015d76c>] (dma_free_attrs) from [<8020f3e4>] (dma_pool_destroy+0xc0/0x154) r8:9efa8860 r7:808f02f0 r6:808f02d0 r5:9ef82880 r4:9ef82780 [<8020f324>] (dma_pool_destroy) from [<805525d0>] (ehci_mem_cleanup+0x6c/0x150) r7:9f563410 r6:9efa8810 r5:00000000 r4:9efd0148 [<80552564>] (ehci_mem_cleanup) from [<80558e0c>] (ehci_stop+0xac/0xc0) r5:9efd0148 r4:9efd0000 [<80558d60>] (ehci_stop) from [<8053c4bc>] (usb_remove_hcd+0xf4/0x1b0) r7:9f563410 r6:9efd0074 r5:81c03048 r4:9efd0000 [<8053c3c8>] (usb_remove_hcd) from [<8056361c>] (host_stop+0x48/0xb8) r7:9f563410 r6:9efd0000 r5:9f5f4040 r4:9f5f5040 [<805635d4>] (host_stop) from [<80563d0c>] (ci_hdrc_host_destroy+0x34/0x38) r7:9f563410 r6:9f5f5040 r5:9efa8800 r4:9f5f4040 [<80563cd8>] (ci_hdrc_host_destroy) from [<8055ef18>] (ci_hdrc_remove+0x50/0x10c) [<8055eec8>] (ci_hdrc_remove) from [<804a2ed8>] (platform_drv_remove+0x34/0x4c) r7:9f563410 r6:81c4f99c r5:9efa8810 r4:9efa8810 [<804a2ea4>] (platform_drv_remove) from [<804a18a8>] (device_release_driver_internal+0xec/0x19c) r5:00000000 r4:9efa8810 [<804a17bc>] (device_release_driver_internal) from [<804a1978>] (device_release_driver+0x20/0x24) r7:9f563410 r6:81c41ed0 r5:9efa8810 r4:9f4a1dac [<804a1958>] (device_release_driver) from [<804a01b8>] (bus_remove_device+0xdc/0x108) [<804a00dc>] (bus_remove_device) from [<8049c204>] (device_del+0x150/0x36c) r7:9f563410 r6:81c03048 r5:9efa8854 r4:9efa8810 [<8049c0b4>] (device_del) from [<804a3368>] (platform_device_del.part.2+0x20/0x84) r10:9f563414 r9:809177e0 r8:81cb07dc r7:81c78320 r6:9f563454 r5:9efa8800 r4:9efa8800 [<804a3348>] (platform_device_del.part.2) from [<804a3420>] (platform_device_unregister+0x28/0x34) r5:9f563400 r4:9efa8800 [<804a33f8>] (platform_device_unregister) from [<8055dce0>] (ci_hdrc_remove_device+0x1c/0x30) r5:9f563400 r4:00000001 [<8055dcc4>] (ci_hdrc_remove_device) from [<805652ac>] (ci_hdrc_imx_remove+0x38/0x118) r7:81c78320 r6:9f563454 r5:9f563410 r4:9f541010 [<8056538c>] (ci_hdrc_imx_shutdown) from [<804a2970>] (platform_drv_shutdown+0x2c/0x30) [<804a2944>] (platform_drv_shutdown) from [<8049e4fc>] (device_shutdown+0x158/0x1f0) [<8049e3a4>] (device_shutdown) from [<8013ac80>] (kernel_restart_prepare+0x44/0x48) r10:00000058 r9:9f4d8000 r8:fee1dead r7:379ce700 r6:81c0b280 r5:81c03048 r4:00000000 [<8013ac3c>] (kernel_restart_prepare) from [<8013ad14>] (kernel_restart+0x1c/0x60) [<8013acf8>] (kernel_restart) from [<8013af84>] (__do_sys_reboot+0xe0/0x1d8) r5:81c03048 r4:00000000 [<8013aea4>] (__do_sys_reboot) from [<8013b0ec>] (sys_reboot+0x18/0x1c) r8:80101204 r7:00000058 r6:00000000 r5:00000000 r4:00000000 [<8013b0d4>] (sys_reboot) from [<80101000>] (ret_fast_syscall+0x0/0x54) Exception stack(0x9f4d9fa8 to 0x9f4d9ff0) 9fa0: 00000000 00000000 fee1dead 28121969 01234567 379ce700 9fc0: 00000000 00000000 00000000 00000058 00000000 00000000 00000000 00016d04 9fe0: 00028e0c 7ec87c64 000135ec 76c1f410 Restore original invalid input check in dma_common_free_remap() to avoid this problem. Fixes: 5cf45379 ("dma-mapping: introduce a dma_common_find_pages helper") Signed-off-by:
Andrey Smirnov <andrew.smirnov@gmail.com> [hch: just revert the offending hunk instead of creating a new helper] Signed-off-by:
Christoph Hellwig <hch@lst.de>
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Dmitry Goldin authored
In commit 43d8ce9d ("Provide in-kernel headers to make extending kernel easier") a new mechanism was introduced, for kernels >=5.2, which embeds the kernel headers in the kernel image or a module and exposes them in procfs for use by userland tools. The archive containing the header files has nondeterminism caused by header files metadata. This patch normalizes the metadata and utilizes KBUILD_BUILD_TIMESTAMP if provided and otherwise falls back to the default behaviour. In commit f7b101d3 ("kheaders: Move from proc to sysfs") it was modified to use sysfs and the script for generation of the archive was renamed to what is being patched. Signed-off-by:
Dmitry Goldin <dgoldin+lkml@protonmail.ch> Reviewed-by:
Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by:
Masahiro Yamada <yamada.masahiro@socionext.com>
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Masahiro Yamada authored
Commit 6dc280eb ("coda: remove uapi/linux/coda_psdev.h") removed a header in question. Some more build errors were fixed. Add more headers into the test coverage. Signed-off-by:
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Masahiro Yamada authored
Capitalize the first word in the sentence. Use obj-m instead of obj-y. obj-y still works, but we have no built-in objects in external module builds. So, obj-m is better IMHO. Signed-off-by: -
Masahiro Yamada authored
Geert Uytterhoeven reports a strange side-effect of commit 858805b3 ("kbuild: add $(BASH) to run scripts with bash-extension"), which inserts the contents of a localversion file in the build directory twice. [Steps to Reproduce] $ echo bar > localversion $ mkdir build $ cd build/ $ echo foo > localversion $ make -s -f ../Makefile defconfig include/config/kernel.release $ cat include/config/kernel.release 5.4.0-rc1foofoobar This comes down to the behavior change of local variables. The 'man sh' on my Ubuntu machine, where sh is an alias to dash, explains as follows: When a variable is made local, it inherits the initial value and exported and readonly flags from the variable with the same name in the surrounding scope, if there is one. Otherwise, the variable is initially unset. [Test Code] foo () { local res echo "res: $res" } res=1 foo [Result] $ sh test.sh res: 1 $ bash test.sh res: So, scripts/setlocalversion correctly works only for bash in spite of its hashbang being #!/bin/sh. Nobody had noticed it before because CONFIG_SHELL was previously set to bash almost all the time. Now that CONFIG_SHELL is set to sh, we must write portable and correct code. I gave the Fixes tag to the commit that uncovered the issue. Clear the variable 'res' in collect_files() to make it work for sh (and it also works on distributions where sh is an alias to bash). Fixes: 858805b3 ("kbuild: add $(BASH) to run scripts with bash-extension") Reported-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
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Jacob Keller authored
The namespace.pl script does not work properly if objtree is not set to an absolute path. The do_nm function is run from within the find function, which changes directories. Because of this, appending objtree, $File::Find::dir, and $source, will return a path which is not valid from the current directory. This used to work when objtree was set to an absolute path when using "make namespacecheck". It appears to have not worked when calling ./scripts/namespace.pl directly. This behavior was changed in 7e1c0477 ("kbuild: Use relative path for $(objtree)", 2014-05-14) Rather than fixing the Makefile to set objtree to an absolute path, just fix namespace.pl to work when srctree and objtree are relative. Also fix the script to use an absolute path for these by default. Use the File::Spec module for this purpose. It's been part of perl 5 since 5.005. The curdir() function is used to get the current directory when the objtree and srctree aren't set in the environment. rel2abs() is used to convert possibly relative objtree and srctree environment variables to absolute paths. Finally, the catfile() function is used instead of string appending paths together, since this is more robust when joining paths together. Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Acked-by:
Randy Dunlap <rdunlap@infradead.org> Tested-by:
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Masahiro Yamada authored
Currently, all the logo C files are generated irrespective of the CONFIG options. Adding them to extra-y is wrong. What we need to do here is to add them to 'targets' so that if_changed works properly. Files listed in 'targets' are cleaned, so clean-files is unneeded. Signed-off-by: -
Masahiro Yamada authored
The pattern *.o is cleaned up globally by the top Makefile. Signed-off-by:
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