bpftool: Add SPDX identifier to btf-dump-file output #148
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A concern about potential GPL violations came up at the new $DAYJOB when I tried to vendor the vmlinux.h output. The central point was that the generated vmlinux.h does not embed a license string -- making the licensing of the file non-obvious. This commit adds a LGPL-2.1 OR BSD-2-Clause SPDX license identifier to the generated vmlinux.h output. This is line with what bpftool generates in object file skeletons. Signed-off-by: Daniel Xu <[email protected]>
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=622993 irrelevant now. Closing PR. |
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There is possible circular locking dependency detected on event_mutex (see below logs). This is due to set fail safe mode is done at dp_panel_read_sink_caps() within event_mutex scope. To break this possible circular locking, this patch move setting fail safe mode out of event_mutex scope. [ 23.958078] ====================================================== [ 23.964430] WARNING: possible circular locking dependency detected [ 23.970777] 5.17.0-rc2-lockdep-00088-g05241de1f69e #148 Not tainted [ 23.977219] ------------------------------------------------------ [ 23.983570] DrmThread/1574 is trying to acquire lock: [ 23.988763] ffffff808423aab0 (&dp->event_mutex){+.+.}-{3:3}, at: msm_dp_displ ay_enable+0x58/0x164 [ 23.997895] [ 23.997895] but task is already holding lock: [ 24.003895] ffffff808420b280 (&kms->commit_lock[i]/1){+.+.}-{3:3}, at: lock_c rtcs+0x80/0x8c [ 24.012495] [ 24.012495] which lock already depends on the new lock. [ 24.012495] [ 24.020886] [ 24.020886] the existing dependency chain (in reverse order) is: [ 24.028570] [ 24.028570] -> #5 (&kms->commit_lock[i]/1){+.+.}-{3:3}: [ 24.035472] __mutex_lock+0xc8/0x384 [ 24.039695] mutex_lock_nested+0x54/0x74 [ 24.044272] lock_crtcs+0x80/0x8c [ 24.048222] msm_atomic_commit_tail+0x1e8/0x3d0 [ 24.053413] commit_tail+0x7c/0xfc [ 24.057452] drm_atomic_helper_commit+0x158/0x15c [ 24.062826] drm_atomic_commit+0x60/0x74 [ 24.067403] drm_mode_atomic_ioctl+0x6b0/0x908 [ 24.072508] drm_ioctl_kernel+0xe8/0x168 [ 24.077086] drm_ioctl+0x320/0x370 [ 24.081123] drm_compat_ioctl+0x40/0xdc [ 24.085602] __arm64_compat_sys_ioctl+0xe0/0x150 [ 24.090895] invoke_syscall+0x80/0x114 [ 24.095294] el0_svc_common.constprop.3+0xc4/0xf8 [ 24.100668] do_el0_svc_compat+0x2c/0x54 [ 24.105242] el0_svc_compat+0x4c/0xe4 [ 24.109548] el0t_32_sync_handler+0xc4/0xf4 [ 24.114381] el0t_32_sync+0x178 [ 24.118688] [ 24.118688] -> #4 (&kms->commit_lock[i]){+.+.}-{3:3}: [ 24.125408] __mutex_lock+0xc8/0x384 [ 24.129628] mutex_lock_nested+0x54/0x74 [ 24.134204] lock_crtcs+0x80/0x8c [ 24.138155] msm_atomic_commit_tail+0x1e8/0x3d0 [ 24.143345] commit_tail+0x7c/0xfc [ 24.147382] drm_atomic_helper_commit+0x158/0x15c [ 24.152755] drm_atomic_commit+0x60/0x74 [ 24.157323] drm_atomic_helper_set_config+0x68/0x90 [ 24.162869] drm_mode_setcrtc+0x394/0x648 [ 24.167535] drm_ioctl_kernel+0xe8/0x168 [ 24.172102] drm_ioctl+0x320/0x370 [ 24.176135] drm_compat_ioctl+0x40/0xdc [ 24.180621] __arm64_compat_sys_ioctl+0xe0/0x150 [ 24.185904] invoke_syscall+0x80/0x114 [ 24.190302] el0_svc_common.constprop.3+0xc4/0xf8 [ 24.195673] do_el0_svc_compat+0x2c/0x54 [ 24.200241] el0_svc_compat+0x4c/0xe4 [ 24.204544] el0t_32_sync_handler+0xc4/0xf4 [ 24.209378] el0t_32_sync+0x174/0x178 [ 24.213680] -> #3 (crtc_ww_class_mutex){+.+.}-{3:3}: [ 24.220308] __ww_mutex_lock.constprop.20+0xe8/0x878 [ 24.225951] ww_mutex_lock+0x60/0xd0 [ 24.230166] modeset_lock+0x190/0x19c [ 24.234467] drm_modeset_lock+0x34/0x54 [ 24.238953] drmm_mode_config_init+0x550/0x764 [ 24.244065] msm_drm_bind+0x170/0x59c [ 24.248374] try_to_bring_up_master+0x244/0x294 [ 24.253572] __component_add+0xf4/0x14c [ 24.258057] component_add+0x2c/0x38 [ 24.262273] dsi_dev_attach+0x2c/0x38 [ 24.266575] dsi_host_attach+0xc4/0x120 [ 24.271060] mipi_dsi_attach+0x34/0x48 [ 24.275456] devm_mipi_dsi_attach+0x28/0x68 [ 24.280298] ti_sn_bridge_probe+0x2b4/0x2dc [ 24.285137] auxiliary_bus_probe+0x78/0x90 [ 24.289893] really_probe+0x1e4/0x3d8 [ 24.294194] __driver_probe_device+0x14c/0x164 [ 24.299298] driver_probe_device+0x54/0xf8 [ 24.304043] __device_attach_driver+0xb4/0x118 [ 24.309145] bus_for_each_drv+0xb0/0xd4 [ 24.313628] __device_attach+0xcc/0x158 [ 24.318112] device_initial_probe+0x24/0x30 [ 24.322954] bus_probe_device+0x38/0x9c [ 24.327439] deferred_probe_work_func+0xd4/0xf0 [ 24.332628] process_one_work+0x2f0/0x498 [ 24.337289] process_scheduled_works+0x44/0x48 [ 24.342391] worker_thread+0x1e4/0x26c [ 24.346788] kthread+0xe4/0xf4 [ 24.350470] ret_from_fork+0x10/0x20 [ 24.354683] [ 24.354683] [ 24.354683] -> #2 (crtc_ww_class_acquire){+.+.}-{0:0}: [ 24.361489] drm_modeset_acquire_init+0xe4/0x138 [ 24.366777] drm_helper_probe_detect_ctx+0x44/0x114 [ 24.372327] check_connector_changed+0xbc/0x198 [ 24.377517] drm_helper_hpd_irq_event+0xcc/0x11c [ 24.382804] dsi_hpd_worker+0x24/0x30 [ 24.387104] process_one_work+0x2f0/0x498 [ 24.391762] worker_thread+0x1d0/0x26c [ 24.396158] kthread+0xe4/0xf4 [ 24.399840] ret_from_fork+0x10/0x20 [ 24.404053] [ 24.404053] -> #1 (&dev->mode_config.mutex){+.+.}-{3:3}: [ 24.411032] __mutex_lock+0xc8/0x384 [ 24.415247] mutex_lock_nested+0x54/0x74 [ 24.419819] dp_panel_read_sink_caps+0x23c/0x26c [ 24.425108] dp_display_process_hpd_high+0x34/0xd4 [ 24.430570] dp_display_usbpd_configure_cb+0x30/0x3c [ 24.436205] hpd_event_thread+0x2ac/0x550 [ 24.440864] kthread+0xe4/0xf4 [ 24.444544] ret_from_fork+0x10/0x20 [ 24.448757] [ 24.448757] -> #0 (&dp->event_mutex){+.+.}-{3:3}: [ 24.455116] __lock_acquire+0xe2c/0x10d8 [ 24.459690] lock_acquire+0x1ac/0x2d0 [ 24.463988] __mutex_lock+0xc8/0x384 [ 24.468201] mutex_lock_nested+0x54/0x74 [ 24.472773] msm_dp_display_enable+0x58/0x164 [ 24.477789] dp_bridge_enable+0x24/0x30 [ 24.482273] drm_atomic_bridge_chain_enable+0x78/0x9c [ 24.488006] drm_atomic_helper_commit_modeset_enables+0x1bc/0x244 [ 24.494801] msm_atomic_commit_tail+0x248/0x3d0 [ 24.499992] commit_tail+0x7c/0xfc [ 24.504031] drm_atomic_helper_commit+0x158/0x15c [ 24.509404] drm_atomic_commit+0x60/0x74 [ 24.513976] drm_mode_atomic_ioctl+0x6b0/0x908 [ 24.519079] drm_ioctl_kernel+0xe8/0x168 [ 24.523650] drm_ioctl+0x320/0x370 [ 24.527689] drm_compat_ioctl+0x40/0xdc [ 24.532175] __arm64_compat_sys_ioctl+0xe0/0x150 [ 24.537463] invoke_syscall+0x80/0x114 [ 24.541861] el0_svc_common.constprop.3+0xc4/0xf8 [ 24.547235] do_el0_svc_compat+0x2c/0x54 [ 24.551806] el0_svc_compat+0x4c/0xe4 [ 24.556106] el0t_32_sync_handler+0xc4/0xf4 [ 24.560948] el0t_32_sync+0x174/0x178 Changes in v2: -- add circular lockiing trace Fixes: d4aca42 ("drm/msm/dp: always add fail-safe mode into connector mode list") Signed-off-by: Kuogee Hsieh <[email protected]> Reviewed-by: Dmitry Baryshkov <[email protected]> Patchwork: https://patchwork.freedesktop.org/patch/481396/ Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Dmitry Baryshkov <[email protected]> Signed-off-by: Rob Clark <[email protected]>
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Commit 6320e69 ("powerpc/perf: Add support for caps under sysfs in powerpc") added support for caps under sysfs in powerpc. This added caps directory to: /sys/bus/event_source/devices/cpu/ for power8, power9, power10 and generic compat PMU in respective PMU driver code. For power10, it is added under "power10_pmu_attr_groups". But for DD1 version, attr_groups are defined under dd1 array: "power10_pmu_attr_groups_dd1". Since caps is not added for DD1, it fails to include "cpu/caps" in DD1 model. The issue was observed while booting power10 pseries with qemu version 6, but not observed with qemu version 7. This is because qemu version 7 uses a DD 2.0 CPU model. Below is the trace log: Can't update unknown attr grp name: cpu/caps^M ------------[ cut here ]------------^M Failed to register pmu: cpu, reason -22^M WARNING: CPU: 1 PID: 1 at kernel/events/core.c:13427 perf_event_sysfs_init+0xbc/0x108^M Modules linked in:^M CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00111-g6320e693d98c #148^M NIP: c0000000020391f4 LR: c0000000020391f0 CTR: c0000000008c9c30^M REGS: c0000000044c38c0 TRAP: 0700 Not tainted (5.19.0-rc2-00111-g6320e693d98c)^M MSR: 8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 48000281 XER: 20040000^M CFAR: c00000000013feac IRQMASK: 0 ^M GPR00: c0000000020391f0 c0000000044c3b60 c00000000283db00 0000000000000027 ^M GPR04: 80000000ffffe0a8 0000000000000000 0000000000000004 00000000fdcd0000 ^M GPR08: 0000000000000027 c0000000ffe07e08 0000000000000001 0000000000000000 ^M GPR12: c00000000035dd90 c0000000fffff300 c000000000012478 0000000000000000 ^M GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ^M GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 ^M GPR24: c000000002003480 0000000000000007 c0000000012a78d0 c000000001170a80 ^M GPR28: c0000000026c4df8 c0000000026c4e68 0000000000000000 c0000000025a8628 ^M NIP [c0000000020391f4] perf_event_sysfs_init+0xbc/0x108^M LR [c0000000020391f0] perf_event_sysfs_init+0xb8/0x108^M Call Trace:^M [c0000000044c3b60] [c0000000020391f0] perf_event_sysfs_init+0xb8/0x108 (unreliable)^M [c0000000044c3bf0] [c000000000011ec4] do_one_initcall+0x64/0x2d0^M [c0000000044c3cd0] [c0000000020049fc] kernel_init_freeable+0x338/0x3e0^M [c0000000044c3db0] [c0000000000124a0] kernel_init+0x30/0x1a0^M [c0000000044c3e10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64^M Instruction dump:^M 813f0038 2c090000 4180002c 7fe3fb78 4a3280c5 2c030000 7c651b78 41820018 ^M e89f0030 7f63db78 4a106c59 60000000 <0fe00000> ebff0000 4bffffb4 39200001 ^M ---[ end trace 0000000000000000 ]---^M Fix it by adding caps for dd1 attr_groups in power10 PMU driver. Fixes: 6320e69 ("powerpc/perf: Add support for caps under sysfs in powerpc") Signed-off-by: Athira Rajeev <[email protected]> [mpe: Update change log to mention qemu 7 DD2.0 CPU model] Signed-off-by: Michael Ellerman <[email protected]> Link: https://lore.kernel.org/r/[email protected]
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The following kernel panic can be triggered when a task with pid=1 attach a prog that attempts to send killing signal to itself, also see [1] for more details: Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106 panic+0x2c4/0x60f kernel/panic.c:275 do_exit.cold+0x63/0xe4 kernel/exit.c:789 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x2460/0x2600 kernel/signal.c:2858 arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd So skip task with pid=1 in bpf_send_signal_common() to avoid the panic. [1] https://lore.kernel.org/bpf/[email protected] Signed-off-by: Hao Sun <[email protected]>
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The following kernel panic can be triggered when a task with pid=1 attach a prog that attempts to send killing signal to itself, also see [1] for more details: Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106 panic+0x2c4/0x60f kernel/panic.c:275 do_exit.cold+0x63/0xe4 kernel/exit.c:789 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x2460/0x2600 kernel/signal.c:2858 arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd So skip task with pid=1 in bpf_send_signal_common() to avoid the panic. [1] https://lore.kernel.org/bpf/[email protected] Signed-off-by: Hao Sun <[email protected]>
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The following kernel panic can be triggered when a task with pid=1 attach a prog that attempts to send killing signal to itself, also see [1] for more details: Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106 panic+0x2c4/0x60f kernel/panic.c:275 do_exit.cold+0x63/0xe4 kernel/exit.c:789 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x2460/0x2600 kernel/signal.c:2858 arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd So skip task with pid=1 in bpf_send_signal_common() to avoid the panic. [1] https://lore.kernel.org/bpf/[email protected] Signed-off-by: Hao Sun <[email protected]>
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The following kernel panic can be triggered when a task with pid=1 attach a prog that attempts to send killing signal to itself, also see [1] for more details: Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106 panic+0x2c4/0x60f kernel/panic.c:275 do_exit.cold+0x63/0xe4 kernel/exit.c:789 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x2460/0x2600 kernel/signal.c:2858 arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd So skip task with pid=1 in bpf_send_signal_common() to avoid the panic. [1] https://lore.kernel.org/bpf/[email protected] Signed-off-by: Hao Sun <[email protected]> Acked-by: Stanislav Fomichev <[email protected]>
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The following kernel panic can be triggered when a task with pid=1 attaches a prog that attempts to send killing signal to itself, also see [1] for more details: Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b CPU: 3 PID: 1 Comm: systemd Not tainted 6.1.0-09652-g59fe41b5255f #148 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x100/0x178 lib/dump_stack.c:106 panic+0x2c4/0x60f kernel/panic.c:275 do_exit.cold+0x63/0xe4 kernel/exit.c:789 do_group_exit+0xd4/0x2a0 kernel/exit.c:950 get_signal+0x2460/0x2600 kernel/signal.c:2858 arch_do_signal_or_restart+0x78/0x5d0 arch/x86/kernel/signal.c:306 exit_to_user_mode_loop kernel/entry/common.c:168 [inline] exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:203 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:296 do_syscall_64+0x44/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd So skip task with pid=1 in bpf_send_signal_common() to avoid the panic. [1] https://lore.kernel.org/bpf/[email protected] Signed-off-by: Hao Sun <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Stanislav Fomichev <[email protected]> Link: https://lore.kernel.org/bpf/[email protected]
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Since limited tracking device per condition, this feature is to support tracking multiple devices concurrently. When a pattern monitor detects the device, this feature issues an address monitor for tracking that device. Let pattern monitor can keep monitor new devices. This feature adds an address filter when receiving a LE monitor device event which monitor handle is for a pattern, and the controller started monitoring the device. And this feature also has cancelled the monitor advertisement from address filters when receiving a LE monitor device event when the controller stopped monitoring the device specified by an address and monitor handle. Below is an example to know the feature adds the address filter. //Add MSFT pattern monitor < HCI Command: Vendor (0x3f|0x00f0) plen 14 #142 [hci0] 55.552420 03 b8 a4 03 ff 01 01 06 09 05 5f 52 45 46 .........._REF > HCI Event: Command Complete (0x0e) plen 6 #143 [hci0] 55.653960 Vendor (0x3f|0x00f0) ncmd 2 Status: Success (0x00) 03 00 //Got event from the pattern monitor > HCI Event: Vendor (0xff) plen 18 #148 [hci0] 58.384953 23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8 #yT3w..h....).'. 00 01 .. //Add MSFT address monitor (Sample address: B8:27:EB:29:C1:FB) < HCI Command: Vendor (0x3f|0x00f0) plen 13 #149 [hci0] 58.385067 03 b8 a4 03 ff 04 00 fb c1 29 eb 27 b8 .........).'. //Report to userspace about found device (ADV Monitor Device Found) @ MGMT Event: Unknown (0x002f) plen 38 {0x0003} [hci0] 58.680042 01 00 fb c1 29 eb 27 b8 01 ce 00 00 00 00 16 00 ....).'......... 0a 09 4b 45 59 42 44 5f 52 45 46 02 01 06 03 19 ..KEYBD_REF..... c1 03 03 03 12 18 ...... //Got event from address monitor > HCI Event: Vendor (0xff) plen 18 #152 [hci0] 58.672956 23 79 54 33 77 88 97 68 02 00 fb c1 29 eb 27 b8 #yT3w..h....).'. 01 01 Signed-off-by: Alex Lu <[email protected]> Signed-off-by: Hilda Wu <[email protected]> Reviewed-by: Simon Horman <[email protected]> Signed-off-by: Luiz Augusto von Dentz <[email protected]>
kernel-patches-daemon-bpf-rc bot
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Aug 30, 2023
Fix up such errors reported by scripts/checkpatch.pl:
ERROR: space required after that ',' (ctx:VxV)
#148: FILE: tools/include/nolibc/arch-aarch64.h:148:
+void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
^
ERROR: space required after that ',' (ctx:VxV)
#148: FILE: tools/include/nolibc/arch-aarch64.h:148:
+void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
^
Signed-off-by: Zhangjin Wu <[email protected]>
Signed-off-by: Willy Tarreau <[email protected]>
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Pull request for series with
subject: bpftool: Add SPDX identifier to btf-dump-file output
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=622993