Bruce Ashfield 9e0ebdc95f linux-yocto/5.4: update to v5.4.262
Updating  to the latest korg -stable release that comprises
the following commits:

    8e221b47173d Linux 5.4.262
    b053223b7cf4 netfilter: nf_tables: bogus EBUSY when deleting flowtable after flush (for 5.4)
    c35df8b8c572 netfilter: nf_tables: disable toggling dormant table state more than once
    e10f661adc55 netfilter: nf_tables: fix table flag updates
    46c2947fcd71 netfilter: nftables: update table flags from the commit phase
    b09e6ccf0d12 netfilter: nf_tables: double hook unregistration in netns path
    b05a24cc453e netfilter: nf_tables: unregister flowtable hooks on netns exit
    a995a68e8a3b netfilter: nf_tables: fix memleak when more than 255 elements expired
    b95d7af657a8 netfilter: nft_set_hash: try later when GC hits EAGAIN on iteration
    61a7b3de20e2 netfilter: nft_set_rbtree: use read spinlock to avoid datapath contention
    03caf75da105 netfilter: nft_set_rbtree: skip sync GC for new elements in this transaction
    021d734c7eaa netfilter: nf_tables: defer gc run if previous batch is still pending
    38ed6a5f836f netfilter: nf_tables: use correct lock to protect gc_list
    4b6346dc1edf netfilter: nf_tables: GC transaction race with abort path
    b76dcf466223 netfilter: nf_tables: GC transaction race with netns dismantle
    29ff9b8efb84 netfilter: nf_tables: fix GC transaction races with netns and netlink event exit path
    1398a0eee290 netfilter: nf_tables: remove busy mark and gc batch API
    85520a1f1d87 netfilter: nft_set_hash: mark set element as dead when deleting from packet path
    c357648929c8 netfilter: nf_tables: adapt set backend to use GC transaction API
    bbdb3b65aa91 netfilter: nf_tables: GC transaction API to avoid race with control plane
    1da4874d05da netfilter: nf_tables: don't skip expired elements during walk
    acaee227cf79 netfilter: nft_set_rbtree: fix overlap expiration walk
    899aa5638568 netfilter: nft_set_rbtree: fix null deref on element insertion
    181859bdfb97 netfilter: nft_set_rbtree: Switch to node list walk for overlap detection
    3c7ec098e3b5 netfilter: nf_tables: drop map element references from preparation phase
    6b880f3b2c04 netfilter: nftables: rename set element data activation/deactivation functions
    e1eed9e0b5e8 netfilter: nf_tables: pass context to nft_set_destroy()
    961c4511c757 tracing: Have trace_event_file have ref counters
    7676a41d90c5 drm/amdgpu: fix error handling in amdgpu_bo_list_get()
    36383005f1db ext4: remove gdb backup copy for meta bg in setup_new_flex_group_blocks
    e95f74653dff ext4: correct the start block of counting reserved clusters
    1fbfdcc3d65e ext4: correct return value of ext4_convert_meta_bg
    dfdfd3f21830 ext4: correct offset of gdb backup in non meta_bg group to update_backups
    85c12e80c474 ext4: apply umask if ACL support is disabled
    d2aed8814f02 Revert "net: r8169: Disable multicast filter for RTL8168H and RTL8107E"
    b9e5f633b35d nfsd: fix file memleak on client_opens_release
    339d7d40d3dc media: venus: hfi: add checks to handle capabilities from firmware
    cab97cdd409a media: venus: hfi: fix the check to handle session buffer requirement
    5d39d0c1f43f media: venus: hfi_parser: Add check to keep the number of codecs within range
    497b12d47cc6 media: sharp: fix sharp encoding
    92d8a0478fb3 media: lirc: drop trailing space from scancode transmit
    cac054d10324 i2c: i801: fix potential race in i801_block_transaction_byte_by_byte
    b132e462363f net: dsa: lan9303: consequently nested-lock physical MDIO
    229738d71702 Revert ncsi: Propagate carrier gain/loss events to the NCSI controller
    4074957ec6bb Bluetooth: btusb: Add 0bda:b85b for Fn-Link RTL8852BE
    356a2ee5fc36 Bluetooth: btusb: Add RTW8852BE device 13d3:3570 to device tables
    afe92b66a5d8 bluetooth: Add device 13d3:3571 to device tables
    dc073a2626d3 bluetooth: Add device 0bda:887b to device tables
    75d26f7f6118 Bluetooth: btusb: Add Realtek RTL8852BE support ID 0x0cb8:0xc559
    323710a6b4c6 Bluetooth: btusb: add Realtek 8822CE to usb_device_id table
    981ee23b8d48 Bluetooth: btusb: Add flag to define wideband speech capability
    0fe69c99cc13 tty: serial: meson: fix hard LOCKUP on crtscts mode
    8f40bbf7dc01 serial: meson: Use platform_get_irq() to get the interrupt
    a1113f2c9b2c tty: serial: meson: retrieve port FIFO size from DT
    13391526d817 serial: meson: remove redundant initialization of variable id
    6245d0d70fe8 ALSA: hda/realtek - Enable internal speaker of ASUS K6500ZC
    4ef452297de4 ALSA: info: Fix potential deadlock at disconnection
    c7df9523fed2 parisc/pgtable: Do not drop upper 5 address bits of physical address
    c32dfec86714 parisc: Prevent booting 64-bit kernels on PA1.x machines
    d570d139cb38 i3c: master: cdns: Fix reading status register
    ad6941b192ca mm/cma: use nth_page() in place of direct struct page manipulation
    36512866607e dmaengine: stm32-mdma: correct desc prep when channel running
    4a5c267d5700 mcb: fix error handling for different scenarios when parsing
    25eb381a736e i2c: core: Run atomic i2c xfer when !preemptible
    975b5ff33f9a kernel/reboot: emergency_restart: Set correct system_state
    421f9ccc75c5 quota: explicitly forbid quota files from being encrypted
    7d0c36cd2e65 jbd2: fix potential data lost in recovering journal raced with synchronizing fs bdev
    665c2f186b8c btrfs: don't arbitrarily slow down delalloc if we're committing
    b5a8382cf829 PM: hibernate: Clean up sync_read handling in snapshot_write_next()
    2b3cfdaa8833 PM: hibernate: Use __get_safe_page() rather than touching the list
    612c17a90fce mmc: vub300: fix an error code
    398940412e8d clk: qcom: ipq8074: drop the CLK_SET_RATE_PARENT flag from PLL clocks
    0b2b22b706ec parisc/pdc: Add width field to struct pdc_model
    012dba0ab814 PCI: keystone: Don't discard .probe() callback
    9988c9dc3c8b PCI: keystone: Don't discard .remove() callback
    a438322e0078 genirq/generic_chip: Make irq_remove_generic_chip() irqdomain aware
    683c562c434d mmc: meson-gx: Remove setting of CMD_CFG_ERROR
    d894f9288cff ACPI: resource: Do IRQ override on TongFang GMxXGxx
    7b15bc9b753f PCI/sysfs: Protect driver's D3cold preference from user space
    78d3487b5b87 hvc/xen: fix error path in xen_hvc_init() to always register frontend driver
    6b21ae025b82 audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()
    c0d01f03aaac audit: don't take task_lock() in audit_exe_compare() code path
    4d0a828775f0 KVM: x86: Ignore MSR_AMD64_TW_CFG access
    5066faedd2f7 KVM: x86: hyper-v: Don't auto-enable stimer on write from user-space
    268d17ab637a x86/cpu/hygon: Fix the CPU topology evaluation for real
    acbc12b0b348 scsi: megaraid_sas: Increase register read retry rount from 3 to 30 for selected registers
    bae690510316 bpf: Fix precision tracking for BPF_ALU | BPF_TO_BE | BPF_END
    6933bc9a5f77 randstruct: Fix gcc-plugin performance mode to stay in group
    c94d05ac6937 media: venus: hfi: add checks to perform sanity on queue pointers
    6d028ade9db7 cifs: spnego: add ';' in HOST_KEY_LEN
    26415e35f669 tools/power/turbostat: Fix a knl bug
    a49786297b83 macvlan: Don't propagate promisc change to lower dev in passthru
    04cb9ab8ebc5 net/mlx5e: Check return value of snprintf writing to fw_version buffer for representors
    c740f4716a44 net/mlx5_core: Clean driver version and name
    e4bdbcce8e02 net/mlx5e: fix double free of encap_header
    5cc1f24f7333 net: stmmac: fix rx budget limit check
    c4b712d1a814 net: stmmac: Rework stmmac_rx()
    b2762d13dfae netfilter: nf_conntrack_bridge: initialize err to 0
    fd51e7541ff6 net: ethernet: cortina: Fix MTU max setting
    823bffdaac39 net: ethernet: cortina: Handle large frames
    f5055d7345d6 net: ethernet: cortina: Fix max RX frame define
    b4f0e605a508 bonding: stop the device in bond_setup_by_slave()
    7ea0a719e578 ptp: annotate data-race around q->head and q->tail
    89af55e0fa13 xen/events: fix delayed eoi list handling
    db957a2f5481 ppp: limit MRU to 64K
    f3b250d91993 tipc: Fix kernel-infoleak due to uninitialized TLV value
    77236275d4cd net: hns3: fix variable may not initialized problem in hns3_init_mac_addr()
    14c6cd41c851 tty: Fix uninit-value access in ppp_sync_receive()
    4d2d30f0792b ipvlan: add ipvlan_route_v6_outbound() helper
    ed53c1518811 NFSv4.1: fix SP4_MACH_CRED protection for pnfs IO
    fe449f8b9727 wifi: iwlwifi: Use FW rate for non-data frames
    eca19db60f99 pwm: Fix double shift bug
    d996530ba92c ASoC: ti: omap-mcbsp: Fix runtime PM underflow warnings
    6d703922bc9e kgdb: Flush console before entering kgdb on panic
    eac3e4760aa1 drm/amd/display: Avoid NULL dereference of timing generator
    514565ff7fce media: cobalt: Use FIELD_GET() to extract Link Width
    2bb42a27a92f gfs2: ignore negated quota changes
    a251e20a2cbe media: vivid: avoid integer overflow
    8f83c85ee882 media: gspca: cpia1: shift-out-of-bounds in set_flicker
    a8f829886d47 i2c: sun6i-p2wi: Prevent potential division by zero
    80876a07ca3b usb: gadget: f_ncm: Always set current gadget in ncm_bind()
    460284dfb10b tty: vcc: Add check for kstrdup() in vcc_probe()
    35b9435123ef HID: Add quirk for Dell Pro Wireless Keyboard and Mouse KM5221W
    b549acf99982 scsi: libfc: Fix potential NULL pointer dereference in fc_lport_ptp_setup()
    33906b36b15d atm: iphase: Do PCI error checks on own line
    54f4dde8fa0c PCI: tegra194: Use FIELD_GET()/FIELD_PREP() with Link Width fields
    2527775616f3 ALSA: hda: Fix possible null-ptr-deref when assigning a stream
    953ed26a77c6 ARM: 9320/1: fix stack depot IRQ stack filter
    7467ca10a5ff jfs: fix array-index-out-of-bounds in diAlloc
    ecfb47f13b08 jfs: fix array-index-out-of-bounds in dbFindLeaf
    32bd8f1cbcf8 fs/jfs: Add validity check for db_maxag and db_agpref
    a81a56b4cbe3 fs/jfs: Add check for negative db_l2nbperpage
    e18d266fb3f1 RDMA/hfi1: Use FIELD_GET() to extract Link Width
    c9c133469730 crypto: pcrypt - Fix hungtask for PADATA_RESET
    ddd6e5266343 selftests/efivarfs: create-read: fix a resource leak
    437e0fa907ba drm/amdgpu: Fix a null pointer access when the smc_rreg pointer is NULL
    d50a56749e5a drm/amd: Fix UBSAN array-index-out-of-bounds for Polaris and Tonga
    c847379a5d00 drm/amd: Fix UBSAN array-index-out-of-bounds for SMU7
    1f24c286f4a4 drm/komeda: drop all currently held locks if deadlock happens
    5305ae0d4ad8 platform/x86: thinkpad_acpi: Add battery quirk for Thinkpad X120e
    3c4236f1b2a7 Bluetooth: Fix double free in hci_conn_cleanup
    3cf391e4174a wifi: ath10k: Don't touch the CE interrupt registers after power up
    252bde6b17b8 net: annotate data-races around sk->sk_dst_pending_confirm
    73909810ac27 net: annotate data-races around sk->sk_tx_queue_mapping
    bd653b07095a wifi: ath10k: fix clang-specific fortify warning
    32cc96dc5f4e wifi: ath9k: fix clang-specific fortify warnings
    efeae5f4972f wifi: mac80211: don't return unset power in ieee80211_get_tx_power()
    770da15be321 wifi: mac80211_hwsim: fix clang-specific fortify warning
    cfe13e1486d4 x86/mm: Drop the 4 MB restriction on minimal NUMA node memory size
    91f7467ac96a clocksource/drivers/timer-atmel-tcb: Fix initialization on SAM9 hardware
    da667a3f8e23 clocksource/drivers/timer-imx-gpt: Fix potential memory leak
    788c0b3442ea perf/core: Bail out early if the request AUX area is out of bound
    dcd85e3c9293 locking/ww_mutex/test: Fix potential workqueue corruption
    ef379773e2e7 Linux 5.4.261
    3542ef5c3748 btrfs: use u64 for buffer sizes in the tree search ioctls
    7868e6151a6d Revert "mmc: core: Capture correct oemid-bits for eMMC cards"
    7be3aca8d73d fbdev: fsl-diu-fb: mark wr_reg_wa() static
    6c66d737b272 fbdev: imsttfb: fix a resource leak in probe
    b90c8dfd715f fbdev: imsttfb: Fix error path of imsttfb_probe()
    4a6a3f1b3840 spi: spi-zynq-qspi: add spi-mem to driver kconfig dependencies
    157333513d14 drm/syncobj: fix DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE
    21858a75dc78 netfilter: nat: fix ipv6 nat redirect with mapped and scoped addresses
    ae99c5e16a83 netfilter: nft_redir: use `struct nf_nat_range2` throughout and deduplicate eval call-backs
    11380557c236 netfilter: xt_recent: fix (increase) ipv6 literal buffer length
    cce1d4668191 r8169: respect userspace disabling IFF_MULTICAST
    e820e23338d1 tg3: power down device only on SYSTEM_POWER_OFF
    f8065cde49b2 net/smc: fix dangling sock under state SMC_APPFINCLOSEWAIT
    592f934b7a22 net: stmmac: xgmac: Enable support for multiple Flexible PPS outputs
    85513df59a3e Fix termination state for idr_for_each_entry_ul()
    56cddb5e657f net: r8169: Disable multicast filter for RTL8168H and RTL8107E
    e5a664ef4928 dccp/tcp: Call security_inet_conn_request() after setting IPv6 addresses.
    3af0af2f98f3 dccp: Call security_inet_conn_request() after setting IPv4 addresses.
    afa49774d812 inet: shrink struct flowi_common
    2199260c42e6 tipc: Change nla_policy for bearer-related names to NLA_NUL_STRING
    cbdcdf42d15d llc: verify mac len before reading mac header
    50d122536661 Input: synaptics-rmi4 - fix use after free in rmi_unregister_function()
    e3677bfcbbcb pwm: brcmstb: Utilize appropriate clock APIs in suspend/resume
    6e9b5295892e pwm: sti: Reduce number of allocations and drop usage of chip_data
    19e45307f71f pwm: sti: Avoid conditional gotos
    c4d5179e42b4 regmap: prevent noinc writes from clobbering cache
    d62d868b30b8 media: dvb-usb-v2: af9035: fix missing unlock
    7843a9bfbe13 media: s3c-camif: Avoid inappropriate kfree()
    b35fdade92c5 media: bttv: fix use after free error due to btv->timeout timer
    0bc0e36fccc2 pcmcia: ds: fix possible name leak in error path in pcmcia_device_add()
    1502edd4a014 pcmcia: ds: fix refcount leak in pcmcia_device_add()
    58d6fb6a933c pcmcia: cs: fix possible hung task and memory leak pccardd()
    37212eede637 rtc: pcf85363: fix wrong mask/val parameters in regmap_update_bits call
    204beeb509d3 i3c: Fix potential refcount leak in i3c_master_register_new_i3c_devs
    247ed618f534 powerpc/pseries: fix potential memory leak in init_cpu_associativity()
    cee681d4b22b powerpc/imc-pmu: Use the correct spinlock initializer.
    dc5804b47b66 powerpc/xive: Fix endian conversion size
    b6cffe8dd7cd modpost: fix tee MODULE_DEVICE_TABLE built on big-endian host
    90ab33735e2e f2fs: fix to initialize map.m_pblk in f2fs_precache_extents()
    9f20b06214dc dmaengine: pxa_dma: Remove an erroneous BUG_ON() in pxad_free_desc()
    688326e2cf9e USB: usbip: fix stub_dev hub disconnect
    b003b7a7d42e tools: iio: iio_generic_buffer ensure alignment
    7a64d15db7aa tools: iio: iio_generic_buffer: Fix some integer type and calculation
    db6d5b9ff6e8 tools: iio: privatize globals and functions in iio_generic_buffer.c file
    55b90e4c406a misc: st_core: Do not call kfree_skb() under spin_lock_irqsave()
    ed9b2ad3b9ca dmaengine: ti: edma: handle irq_of_parse_and_map() errors
    64c47749fc75 usb: dwc2: fix possible NULL pointer dereference caused by driver concurrency
    4050f13f71f2 tty: tty_jobctrl: fix pid memleak in disassociate_ctty()
    ba46faaa49c5 leds: trigger: ledtrig-cpu:: Fix 'output may be truncated' issue for 'cpu'
    abfd682fc5f0 ledtrig-cpu: Limit to 8 CPUs
    f6c3b7a4ce51 leds: pwm: Don't disable the PWM when the LED should be off
    cd6f50115fab leds: pwm: convert to atomic PWM API
    9686f771c096 leds: pwm: simplify if condition
    87b1ee831ddf mfd: dln2: Fix double put in dln2_probe
    b843d2cd134b ASoC: ams-delta.c: use component after check
    4634c9cc726d ASoC: Intel: Skylake: Fix mem leak when parsing UUIDs fails
    66888e6953f8 sh: bios: Revive earlyprintk support
    fdcbe9ce7bf3 RDMA/hfi1: Workaround truncation compilation error
    01698922f5d3 scsi: ufs: core: Leave space for '\0' in utf8 desc string
    3c61391a31a6 ext4: move 'ix' sanity check to corrent position
    454e6493bbda ARM: 9321/1: memset: cast the constant byte to unsigned char
    727203e6e7e7 hid: cp2112: Fix duplicate workqueue initialization
    48bb2931f24c HID: cp2112: Use irqchip template
    7b62cf90d0ea crypto: caam/jr - fix Chacha20 + Poly1305 self test failure
    090e89c71620 crypto: caam/qi2 - fix Chacha20 + Poly1305 self test failure
    40ba3fa21250 nd_btt: Make BTT lanes preemptible
    68655462f8be sched/rt: Provide migrate_disable/enable() inlines
    d14a373fe559 libnvdimm/of_pmem: Use devm_kstrdup instead of kstrdup and check its return value
    f5d95a39683e hwrng: geode - fix accessing registers
    e4e4d4abb82b clk: scmi: Free scmi_clk allocated when the clocks with invalid info are skipped
    ce11e445d0ae firmware: ti_sci: Mark driver as non removable
    5d97cc0b491e firmware: ti_sci: Replace HTTP links with HTTPS ones
    cc1a1dcb411f soc: qcom: llcc: Handle a second device without data corruption
    813fdddde20f soc: qcom: Rename llcc-slice to llcc-qcom
    077010717b52 soc: qcom: llcc cleanup to get rid of sdm845 specific driver file
    3da50ee512e2 ARM: dts: qcom: mdm9615: populate vsdcc fixed regulator
    6b464d9414e3 arm64: dts: qcom: sdm845-mtp: fix WiFi configuration
    64d990086065 drm/rockchip: cdn-dp: Fix some error handling paths in cdn_dp_probe()
    ddc42881f170 drm/radeon: possible buffer overflow
    4a29f0f7a1b7 drm/rockchip: vop: Fix call to crtc reset helper
    824f0f4f93c6 drm/rockchip: vop: Fix reset of state in duplicate state crtc funcs
    eaf62ea6504f hwmon: (coretemp) Fix potentially truncated sysfs attribute name
    9fb0eed09e14 platform/x86: wmi: Fix opening of char device
    22117b77eecb platform/x86: wmi: remove unnecessary initializations
    1607ea8a8161 platform/x86: wmi: Fix probe failure when failing to register WMI devices
    d1461f0c9ca0 clk: mediatek: clk-mt2701: Add check for mtk_alloc_clk_data
    e8ae4b49dd9c clk: mediatek: clk-mt7629: Add check for mtk_alloc_clk_data
    cfa68e0ac5dc clk: mediatek: clk-mt7629-eth: Add check for mtk_alloc_clk_data
    2705c5b97f50 clk: mediatek: clk-mt6797: Add check for mtk_alloc_clk_data
    fbe466f06d4e clk: mediatek: clk-mt6779: Add check for mtk_alloc_clk_data
    8ae911637b0b clk: npcm7xx: Fix incorrect kfree
    cbcf67b0bc5d clk: keystone: pll: fix a couple NULL vs IS_ERR() checks
    3d38bc4bab88 clk: imx: Select MXC_CLK for CLK_IMX8QXP
    ae98b5ef991a clk: qcom: gcc-sm8150: Fix gcc_sdcc2_apps_clk_src
    15f335494bb3 clk: qcom: gcc-sm8150: use ARRAY_SIZE instead of specifying num_parents
    141ccc127230 clk: qcom: clk-rcg2: Fix clock rate overflow for high parent frequencies
    dbf13624b2de regmap: debugfs: Fix a erroneous check after snprintf()
    af50165c1218 ipvlan: properly track tx_errors
    76304c749e05 net: add DEV_STATS_READ() helper
    4482b250c895 ipv6: avoid atomic fragment on GSO packets
    19d527337870 ACPI: sysfs: Fix create_pnp_modalias() and create_of_modalias()
    5105d46146f2 tcp: fix cookie_init_timestamp() overflows
    e4e819bdc8f3 tcp: Remove one extra ktime_get_ns() from cookie_init_timestamp
    7ab8aa73002c chtls: fix tp->rcv_tstamp initialization
    75bbf6e93462 r8169: fix rare issue with broken rx after link-down on RTL8125
    282342bc47c6 r8169: use tp_to_dev instead of open code
    3091ab943dfc thermal: core: prevent potential string overflow
    35854733ae67 can: dev: can_restart(): fix race condition between controller restart and netif_carrier_on()
    b53be254d30f can: dev: can_restart(): don't crash kernel if carrier is OK
    a29f012a27cf wifi: rtlwifi: fix EDCA limit set by BT coexistence
    bed72a332f02 tcp_metrics: do not create an entry from tcp_init_metrics()
    f3902c0e6f08 tcp_metrics: properly set tp->snd_ssthresh in tcp_init_metrics()
    b78f2b7774a0 tcp_metrics: add missing barriers on delete
    af0fe2c2ff4d wifi: mt76: mt7603: rework/fix rx pse hang check
    a2e99dbdc127 wifi: rtw88: debug: Fix the NULL vs IS_ERR() bug for debugfs_create_file()
    c9b929f7932b tcp: call tcp_try_undo_recovery when an RTOd TFO SYNACK is ACKed
    25eaef1d0d0e i40e: fix potential memory leaks in i40e_remove()
    09ce728c9e27 genirq/matrix: Exclude managed interrupts in irq_matrix_allocated()
    3718a48ef495 vfs: fix readahead(2) on block devices

(From OE-Core rev: a1e332f095eec1cb7a386a14c9ff4ce59594901a)

Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
2023-12-08 11:45:59 -10:00
2023-12-08 11:45:59 -10:00
2021-12-08 20:28:01 +00:00
2023-10-24 05:22:46 -10:00

QEMU Emulation Targets
======================

To simplify development, the build system supports building images to
work with the QEMU emulator in system emulation mode. Several architectures
are currently supported in 32 and 64 bit variants:

  * ARM (qemuarm + qemuarm64)
  * x86 (qemux86 + qemux86-64)
  * PowerPC (qemuppc only)
  * MIPS (qemumips + qemumips64)

Use of the QEMU images is covered in the Yocto Project Reference Manual.
The appropriate MACHINE variable value corresponding to the target is given
in brackets.
Description
Yocto Project reference distribution Poky
https://yoctoproject.org/
Readme 260 MiB