- 25 Jan, 2022 2 commits
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Mark Brown authored
Merge series from Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>: After the first firmware boot, the firmware is capable of saving/restoring its context to/from IMR (Isolated Memory Region, set aside by BIOS on startup). This capability improves the resume speed. Due to an unexplained issue on Up2 boards, this capability is disabled on ApolloLake. For backwards compatibility, the regular boot flow is used with older firmware. For added peace of mind, a kernel module parameter is provided to force the regular boot flow - this shouldn't be necessary since we've been testing these patches for 6+ months.
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Mark Brown authored
Merge series from Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com>: Following series performs few cleanups in topology code. First patch reduces number of prints we get from failure. Second allos TLV controls to be either read or write which should be possible as evidenced by further code in function. Last one cleanups after refactoring of memory handling. v2: - Add missing Fixes tag on second patch - Add Reviewed-by tag from Pierre Amadeusz Sławiński (3): ASoC: topology: Remove superfluous error prints ASoC: topology: Allow TLV control to be either read or write ASoC: topology: Optimize soc_tplg_dapm_graph_elems_load behavior sound/soc/soc-topology.c | 103 ++++++++++----------------------------- 1 file changed, 27 insertions(+), 76 deletions(-) -- 2.25.1
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- 24 Jan, 2022 15 commits
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Jiasheng Jiang authored
Since the potential failure of the devm_regmap_init_mmio(), it will return error pointer and be assigned to the regmap. Then the error pointer will be dereferenced. For example rx->regmap will be used in rx_macro_mclk_enable(). Therefore, it should be better to check it. Fixes: af3d54b9 ("ASoC: codecs: lpass-rx-macro: add support for lpass rx macro") Fixes: c39667dd ("ASoC: codecs: lpass-tx-macro: add support for lpass tx macro") Fixes: 809bcbce ("ASoC: codecs: lpass-wsa-macro: Add support to WSA Macro") Signed-off-by:
Jiasheng Jiang <jiasheng@iscas.ac.cn> Link: https://lore.kernel.org/r/20220121171031.2826198-1-jiasheng@iscas.ac.cnSigned-off-by:
Mark Brown <broonie@kernel.org>
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Mac Chiang authored
codec system clock source support 512FS MCLK synchronous directly, so no need to set PLL configuration when MCLK 24.576MHz. Suggested-by:
Shuming Fan <shumingf@realtek.com> Signed-off-by:
Mac Chiang <mac.chiang@intel.com> Acked-by:
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20220120054012.15849-1-mac.chiang@intel.comSigned-off-by:
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V sujith kumar Reddy authored
We have new platform with rt5682s as a primary codec and rt1019 as an amp codec. Add machine struct to register sof audio based sound card on such Chrome machine. Signed-off-by:
Ajit Kumar Pandey <AjitKumar.Pandey@amd.com> Signed-off-by:
V sujith kumar Reddy <vsujithkumar.reddy@amd.com> Link: https://lore.kernel.org/r/20220122194707.2661026-1-vsujithkumar.reddy@amd.comSigned-off-by:
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Shengjiu Wang authored
The config->pcm_hardware may be NULL when config->prealloc_buffer_size is not zero, so it is better to move max_buffer_size assignment under a separate condition. Signed-off-by:
Shengjiu Wang <shengjiu.wang@nxp.com> Link: https://lore.kernel.org/r/1642646642-15908-1-git-send-email-shengjiu.wang@nxp.comSigned-off-by:
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Minghao Chi authored
Return value from io_remap_pfn_range() directly instead of taking this in another redundant variable. Reported-by:
Zeal Robot <zealci@zte.com.cn> Signed-off-by:
Minghao Chi <chi.minghao@zte.com.cn> Signed-off-by:
CGEL ZTE <cgel.zte@gmail.com> Link: https://lore.kernel.org/r/20220117110357.863990-1-chi.minghao@zte.com.cnSigned-off-by:
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Minghao Chi authored
Return value from devm_snd_soc_register_component() directly instead of taking this in another redundant variable. Reported-by:
Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://lore.kernel.org/r/20220110012833.643994-1-chi.minghao@zte.com.cnSigned-off-by:
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Amadeusz Sławiński authored
Before commit "ASoC: topology: Change allocations to resource managed" soc_tplg_dapm_graph_elems_load() used to free routes on error. During migration to managed allocations the routes table was left as is, but looking at it again it is unnecessary, so remove routes table and just keep pointer to DAPM route currently being set up. Also remove outdated comments which keep describing old behavior of remove_route() freeing memory. While it still does some cleanup, it leaves freeing memory to framework. Fixes: ff922622 ("ASoC: topology: Change allocations to resource managed") Signed-off-by:
Amadeusz Sławiński <amadeuszx.slawinski@linux.intel.com> Reviewed-by:
Cezary Rojewski <cezary.rojewski@intel.com> Reviewed-by:
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Amadeusz Sławiński authored
There is no reason to force readwrite access on TLV controls. It can be either read, write or both. This is further evidenced in code where it performs following checks: if ((k->access & SNDRV_CTL_ELEM_ACCESS_TLV_READ) && !sbe->get) return -EINVAL; if ((k->access & SNDRV_CTL_ELEM_ACCESS_TLV_WRITE) && !sbe->put) return -EINVAL; Fixes: 1a3232d2 ("ASoC: topology: Add support for TLV bytes controls") Signed-off-by: -
Amadeusz Sławiński authored
soc_tplg_check_elem_count(), already prints an error when applicable, so there is no need to print another one. Also clean up alignment of arguments in if, so there is no confusion about what is checked and what is executed if condition is true. Signed-off-by:
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Keyon Jie authored
Add flag _IGNORE_D3_PERSISTENT to disable IMR restore feature to the sof_debug module parameter. The IMR restore feature will be enabled for all Intel cAVS platforms by default, but setting the flag _IGNORE_D3_PERSISTENT can help to disable the feature for debug purpose, to rule out any possible regression introduced by the change of not re-downloading firmware to the DSP at resuming from suspended state. Reviewed-by:
Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Reviewed-by:
Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Signed-off-by:
Keyon Jie <yang.jie@linux.intel.com> Signed-off-by:
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Keyon Jie authored
If the firmware declares the IMR restore feature, we only need to do a simple powering up to resume from D3, no firmware re-downloading needed - the context is saved/restored to/from IMR without needing driver support. Add a hda_dsp_boot_imr() helper for this simple DSP reboot, and use it when it is available. Reviewed-by:
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Keyon Jie authored
Move the SSP clock configuration to the hda_set_ssp_cbp_cfp() helper, to be used in follow-up patches Reviewed-by:
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Pierre-Louis Bossart authored
We introduced provider/consumer terms, and CBP_CFP acronyms for codec drivers, let's use them as well in SOF. Reviewed-by:
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Keyon Jie authored
Add a bit definition to the fw_ready message, to denote if the FW supports the IMR (Isolated Memory Region) restoring feature. If the bit is set, the driver can skip downloading the firmware again during system resume or runtime resume. Bump the ABI version to 3.19 to make it aligned with FW side. Reviewed-by:
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Mark Brown authored
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- 23 Jan, 2022 6 commits
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Linus Torvalds authored
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Linus Torvalds authored
Merge tag 'perf-tools-for-v5.17-2022-01-22' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux Pull more perf tools updates from Arnaldo Carvalho de Melo: - Fix printing 'phys_addr' in 'perf script'. - Fix failure to add events with 'perf probe' in ppc64 due to not removing leading dot (ppc64 ABIv1). - Fix cpu_map__item() python binding building. - Support event alias in form foo-bar-baz, add pmu-events and parse-event tests for it. - No need to setup affinities when starting a workload or attaching to a pid. - Use path__join() to compose a path instead of ad-hoc snprintf() equivalent. - Override attr->sample_period for non-libpfm4 events. - Use libperf cpumap APIs instead of accessing the internal state directly. - Sync x86 arch prctl headers and files changed by the new set_mempolicy_home_node syscall with the kernel sources. - Remove duplicate include in cpumap.h. - Remove redundant err variable. * tag 'perf-tools-for-v5.17-2022-01-22' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: perf tools: Remove redundant err variable perf test: Add parse-events test for aliases with hyphens perf test: Add pmu-events test for aliases with hyphens perf parse-events: Support event alias in form foo-bar-baz perf evsel: Override attr->sample_period for non-libpfm4 events perf cpumap: Remove duplicate include in cpumap.h perf cpumap: Migrate to libperf cpumap api perf python: Fix cpu_map__item() building perf script: Fix printing 'phys_addr' failure issue tools headers UAPI: Sync files changed by new set_mempolicy_home_node syscall tools headers UAPI: Sync x86 arch prctl headers with the kernel sources perf machine: Use path__join() to compose a path instead of snprintf(dir, '/', filename) perf evlist: No need to setup affinities when disabling events for pid targets perf evlist: No need to setup affinities when enabling events for pid targets perf stat: No need to setup affinities when starting a workload perf affinity: Allow passing a NULL arg to affinity__cleanup() perf probe: Fix ppc64 'perf probe add events failed' case
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git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-traceLinus Torvalds authored
Pull ftrace fix from Steven Rostedt: "Fix s390 breakage from sorting mcount tables. The latest merge of the tracing tree sorts the mcount table at build time. But s390 appears to do things differently (like always) and replaces the sorted table back to the original unsorted one. As the ftrace algorithm depends on it being sorted, bad things happen when it is not, and s390 experienced those bad things. Add a new config to tell the boot if the mcount table is sorted or not, and allow s390 to opt out of it" * tag 'trace-v5.17-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: ftrace: Fix assuming build time sort works for s390
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Steven Rostedt (Google) authored
To speed up the boot process, as mcount_loc needs to be sorted for ftrace to work properly, sorting it at build time is more efficient than boot up and can save milliseconds of time. Unfortunately, this change broke s390 as it will modify the mcount_loc location after the sorting takes place and will put back the unsorted locations. Since the sorting is skipped at boot up if it is believed that it was sorted at run time, ftrace can crash as its algorithms are dependent on the list being sorted. Add a new config BUILDTIME_MCOUNT_SORT that is set when BUILDTIME_TABLE_SORT but not if S390 is set. Use this config to determine if sorting should take place at boot up. Link: https://lore.kernel.org/all/yt9dee51ctfn.fsf@linux.ibm.com/ Fixes: 72b3942a ("scripts: ftrace - move the sort-processing in ftrace_init") Reported-by:
Sven Schnelle <svens@linux.ibm.com> Tested-by:
Heiko Carstens <hca@linux.ibm.com> Signed-off-by:
Steven Rostedt (Google) <rostedt@goodmis.org>
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Bring include/uapi/linux/nfc.h into the UAPI compile-test coverage - Revert the workaround of CONFIG_CC_IMPLICIT_FALLTHROUGH - Fix build errors in certs/Makefile * tag 'kbuild-fixes-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: certs: Fix build error when CONFIG_MODULE_SIG_KEY is empty certs: Fix build error when CONFIG_MODULE_SIG_KEY is PKCS#11 URI Revert "Makefile: Do not quote value for CONFIG_CC_IMPLICIT_FALLTHROUGH" usr/include/Makefile: add linux/nfc.h to the compile-test coverage
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git://github.com/norov/linuxLinus Torvalds authored
Pull bitmap updates from Yury Norov: - introduce for_each_set_bitrange() - use find_first_*_bit() instead of find_next_*_bit() where possible - unify for_each_bit() macros * tag 'bitmap-5.17-rc1' of git://github.com/norov/linux: vsprintf: rework bitmap_list_string lib: bitmap: add performance test for bitmap_print_to_pagebuf bitmap: unify find_bit operations mm/percpu: micro-optimize pcpu_is_populated() Replace for_each_*_bit_from() with for_each_*_bit() where appropriate find: micro-optimize for_each_{set,clear}_bit() include/linux: move for_each_bit() macros from bitops.h to find.h cpumask: replace cpumask_next_* with cpumask_first_* where appropriate tools: sync tools/bitmap with mother linux all: replace find_next{,_zero}_bit with find_first{,_zero}_bit where appropriate cpumask: use find_first_and_bit() lib: add find_first_and_bit() arch: remove GENERIC_FIND_FIRST_BIT entirely include: move find.h from asm_generic to linux bitops: move find_bit_*_le functions from le.h to find.h bitops: protect find_first_{,zero}_bit properly
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- 22 Jan, 2022 17 commits
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Minghao Chi authored
Return value from perf_event__process_tracing_data() directly instead of taking this in another redundant variable. Reported-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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John Garry authored
Add a test which allows us to test parsing an event alias with hyphens. Since these events typically do not exist on most host systems, add the alias to the fake pmu. Function perf_pmu__test_parse_init() has terms added to match known test aliases. Signed-off-by:
John Garry <john.garry@huawei.com> Acked-by:
Ian Rogers <irogers@google.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Qi Liu <liuqi115@huawei.com> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: linuxarm@huawei.com Link: https://lore.kernel.org/r/1642432215-234089-4-git-send-email-john.garry@huawei.comSigned-off-by:
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John Garry authored
Add a test for aliases with hyphens in the name to ensure that the pmu-events tables are as expects. There should be no reason why these sort of aliases would be treated differently, but no harm in checking. Signed-off-by:
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John Garry authored
Event aliasing for events whose name in the form foo-bar-baz is not supported, while foo-bar, foo_bar_baz, and other combinations are, i.e. two hyphens are not supported. The HiSilicon D06 platform has events in such form: $ ./perf list sdir-home-migrate List of pre-defined events (to be used in -e): uncore hha: sdir-home-migrate [Unit: hisi_sccl,hha] $ sudo ./perf stat -e sdir-home-migrate event syntax error: 'sdir-home-migrate' \___ parser error Run 'perf list' for a list of valid events Usage: perf stat [<options>] [<command>] -e, --event <event>event selector. use 'perf list' to list available events To support, add an extra PMU event symbol type for "baz", and add a new rule in the bison file. Signed-off-by: -
German Gomez authored
A previous patch preventing "attr->sample_period" values from being overridden in pfm events changed a related behaviour in arm-spe. Before said patch: perf record -c 10000 -e arm_spe_0// -- sleep 1 Would yield an SPE event with period=10000. After the patch, the period in "-c 10000" was being ignored because the arm-spe code initializes sample_period to a non-zero value. This patch restores the previous behaviour for non-libpfm4 events. Fixes: ae5dcc8a (“perf record: Prevent override of attr->sample_period for libpfm4 events”) Reported-by:
Chase Conklin <chase.conklin@arm.com> Signed-off-by:
German Gomez <german.gomez@arm.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: John Fastabend <john.fastabend@gmail.com> Cc: KP Singh <kpsingh@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Martin KaFai Lau <kafai@fb.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Song Liu <songliubraving@fb.com> Cc: Stephane Eranian <eranian@google.com> Cc: Yonghong Song <yhs@fb.com> Cc: bpf@vger.kernel.org Cc: netdev@vger.kernel.org Link: http://lore.kernel.org/lkml/20220118144054.2541-1-german.gomez@arm.comSigned-off-by:
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Lv Ruyi authored
Remove all but the first include of stdbool.h from cpumap.h. Reported-by:
Lv Ruyi <lv.ruyi@zte.com.cn> Acked-by:
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Ian Rogers authored
Switch from directly accessing the perf_cpu_map to using the appropriate libperf API when possible. Using the API simplifies the job of refactoring use of perf_cpu_map. Signed-off-by:
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Ian Rogers authored
Value should be built as an integer. Switch some uses of perf_cpu_map to use the library API. Fixes: 6d18804b ("perf cpumap: Give CPUs their own type") Signed-off-by:
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Yao Jin authored
Perf script was failed to print the phys_addr for SPE profiling. One 'dummy' event is added by SPE profiling but it doesn't have PHYS_ADDR attribute set, perf script then exits with error. Now referring to 'addr', use evsel__do_check_stype() to check the type. Before: # perf record -e arm_spe_0/branch_filter=0,ts_enable=1,pa_enable=1,load_filter=1,jitter=0,\ store_filter=0,min_latency=0,event_filter=2/ -p 4064384 -- sleep 3 # perf script -F pid,tid,addr,phys_addr Samples for 'dummy:u' event do not have PHYS_ADDR attribute set. Cannot print 'phys_addr' field. After: # perf record -e arm_spe_0/branch_filter=0,ts_enable=1,pa_enable=1,load_filter=1,jitter=0,\ store_filter=0,min_latency=0,event_filter=2/ -p 4064384 -- sleep 3 # perf script -F pid,tid,addr,phys_addr 4064384/4064384 ffff802f921be0d0 2f921be0d0 4064384/4064384 ffff802f921be0d0 2f921be0d0 Reviewed-by:
Yao Jin <jinyao5@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Hanjun Guo <guohanjun@huawei.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20220121065954.2121900-1-liwei391@huawei.comSigned-off-by:
Wei Li <liwei391@huawei.com> Signed-off-by:
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Masahiro Yamada authored
Since b8c96a6b ("certs: simplify $(srctree)/ handling and remove config_filename macro"), when CONFIG_MODULE_SIG_KEY is empty, signing_key.x509 fails to build: CERT certs/signing_key.x509 Usage: extract-cert <source> <dest> make[1]: *** [certs/Makefile:78: certs/signing_key.x509] Error 2 make: *** [Makefile:1831: certs] Error 2 Pass "" to the first argument of extract-cert to fix the build error. Link: https://lore.kernel.org/linux-kbuild/20220120094606.2skuyb26yjlnu66q@lion.mk-sys.cz/T/#u Fixes: b8c96a6b ("certs: simplify $(srctree)/ handling and remove config_filename macro") Reported-by:
Michal Kubecek <mkubecek@suse.cz> Signed-off-by:
Masahiro Yamada <masahiroy@kernel.org> Tested-by:
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Masahiro Yamada authored
When CONFIG_MODULE_SIG_KEY is PKCS#11 URL (pkcs11:*), signing_key.x509 fails to build: certs/Makefile:77: *** target pattern contains no '%'. Stop. Due to the typo, $(X509_DEP) contains a colon. Fix it. Fixes: b8c96a6b ("certs: simplify $(srctree)/ handling and remove config_filename macro") Signed-off-by:
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Masahiro Yamada authored
This reverts commit cd8c917a. Commit 129ab0d2 ("kbuild: do not quote string values in include/config/auto.conf") provided the final solution. Now reverting the temporary workaround. Signed-off-by:
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Dmitry V. Levin authored
As linux/nfc.h userspace compilation was finally fixed by commits 79b69a83 ("nfc: uapi: use kernel size_t to fix user-space builds") and 7175f02c ("uapi: fix linux/nfc.h userspace compilation errors"), there is no need to keep the compile-test exception for it in usr/include/Makefile. Signed-off-by:
Dmitry V. Levin <ldv@altlinux.org> Signed-off-by:
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Linus Torvalds authored
Merge yet more updates from Andrew Morton: "This is the post-linux-next queue. Material which was based on or dependent upon material which was in -next. 69 patches. Subsystems affected by this patch series: mm (migration and zsmalloc), sysctl, proc, and lib" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (69 commits) mm: hide the FRONTSWAP Kconfig symbol frontswap: remove support for multiple ops mm: mark swap_lock and swap_active_head static frontswap: simplify frontswap_register_ops frontswap: remove frontswap_test mm: simplify try_to_unuse frontswap: remove the frontswap exports frontswap: simplify frontswap_init frontswap: remove frontswap_curr_pages frontswap: remove frontswap_shrink frontswap: remove frontswap_tmem_exclusive_gets frontswap: remove frontswap_writethrough mm: remove cleancache lib/stackdepot: always do filter_irq_stacks() in stack_depot_save() lib/stackdepot: allow optional init and stack_table allocation by kvmalloc() proc: remove PDE_DATA() completely fs: proc: store PDE()->data into inode->i_private zsmalloc: replace get_cpu_var with local_lock zsmalloc: replace per zpage lock with pool->migrate_lock locking/rwlocks: introduce write_lock_nested ...
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull cifs fixes from Steve French: - multichannel fixes, addressing additional reconnect and DFS scenarios - reenabling fscache support (indexing rewrite, metadata caching e.g.) - send additional version information during NTLMSSP negotiate to improve debugging - fix for a mount race - DFS fixes - fix for a memory leak for stable * tag '5.17-rc-part2-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: cifs: update internal module number smb3: send NTLMSSP version information cifs: Support fscache indexing rewrite cifs: cifs_ses_mark_for_reconnect should also update reconnect bits cifs: update tcpStatus during negotiate and sess setup cifs: make status checks in version independent callers cifs: remove repeated state change in dfs tree connect cifs: fix the cifs_reconnect path for DFS cifs: remove unused variable ses_selected cifs: protect all accesses to chan_* with chan_lock cifs: fix the connection state transitions with multichannel cifs: check reconnects for channels of active tcons too smb3: add new defines from protocol specification cifs: serialize all mount attempts cifs: quirk for STATUS_OBJECT_NAME_INVALID returned for non-ASCII dfs refs cifs: alloc_path_with_tree_prefix: do not append sep. if the path is empty cifs: clean up an inconsistent indenting cifs: free ntlmsspblob allocated in negotiate
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git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds authored
Pull xfs fixes from Darrick Wong: "One of the patches removes some dead code from xfs_ioctl32.h and the other fixes broken workqueue flushing in the inode garbage collector. - Minor cleanup of ioctl32 cruft - Clean up open coded inodegc workqueue function calls" * tag 'xfs-5.17-merge-7' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: flush inodegc workqueue tasks before cancel xfs: remove unused xfs_ioctl32.h declarations
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Linus Torvalds authored
Merge tag 'fscache-fixes-20220121' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs Pull more fscache updates from David Howells: "A set of fixes and minor updates for the fscache rewrite: - Fix mishandling of volume collisions (the wait condition is inverted and so it was only waiting if the volume collision was already resolved). - Fix miscalculation of whether there's space available in cachefiles. - Make sure a default cache name is set on a cache if the user hasn't set one by the time they bind the cache. - Adjust the way the backing inode is presented in tracepoints, add a tracepoint for mkdir and trace directory lookup. - Add a tracepoint for failure to set the active file mark. - Add an explanation of the checks made on the backing filesystem. - Check that the backing filesystem supports tmpfile. - Document how the page-release cancellation of the read-skip optimisation works. And I've included a change for netfslib: - Make ops->init_rreq() optional" * tag 'fscache-fixes-20220121' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs: netfs: Make ops->init_rreq() optional fscache: Add a comment explaining how page-release optimisation works cachefiles: Check that the backing filesystem supports tmpfiles cachefiles: Explain checks in a comment cachefiles: Trace active-mark failure cachefiles: Make some tracepoint adjustments cachefiles: set default tag name if it's unspecified cachefiles: Calculate the blockshift in terms of bytes, not pages fscache: Fix the volume collision wait condition
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