Tao Chen 5108828fec perf/ring_buffer: Allow the EPOLLRDNORM flag for poll ...

[ Upstream commit c96fff391c ]

The poll man page says POLLRDNORM is equivalent to POLLIN. For poll(),
it seems that if user sets pollfd with POLLRDNORM in userspace, perf_poll
will not return until timeout even if perf_output_wakeup called,
whereas POLLIN returns.

Fixes: 76369139ce ("perf: Split up buffer handling from core code")
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250314030036.2543180-1-chen.dylane@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-04-10 14:39:12 +02:00

..

bpf

bpf: skip non exist keys in generic_map_lookup_batch

2025-02-27 04:30:21 -08:00

cgroup

cgroup: fix race between fork and cgroup.kill

2025-02-21 14:01:35 +01:00

configs

tinyconfig: remove unnecessary 'is not set' for choice blocks

2024-09-01 20:34:38 +09:00

debug

move asm/unaligned.h to linux/unaligned.h

2024-10-02 17:23:23 -04:00

dma

dma-mapping: fix missing clear bdr in check_ram_in_range_map()

2025-03-28 22:03:26 +01:00

entry

treewide: context_tracking: Rename CONTEXT_* into CT_STATE_*

2024-07-29 07:33:10 +05:30

events

perf/ring_buffer: Allow the EPOLLRDNORM flag for poll

2025-04-10 14:39:12 +02:00

futex

futex: Pass in task to futex_queue()

2025-03-22 12:54:14 -07:00

gcov

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irq

genirq: Make handle_enforce_irqctx() unconditionally available

2025-02-08 09:57:00 +01:00

kcsan

kcsan: Turn report_filterlist_lock into a raw_spinlock

2024-12-14 20:03:37 +01:00

livepatch

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locking

locking/ww_mutex/test: Use swap() macro

2025-02-17 10:04:44 +01:00

module

module: Don't fail module loading when setting ro_after_init section RO failed

2025-02-08 09:57:58 +01:00

power

PM: hibernate: Add error handling for syscore_suspend()

2025-02-08 09:58:03 +01:00

printk

printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX

2025-02-17 10:04:46 +01:00

rcu

mm/slab/kvfree_rcu: Switch to WQ_MEM_RECLAIM wq

2025-03-22 12:54:09 -07:00

sched

sched/eevdf: Force propagating min_slice of cfs_rq when {en,de}queue tasks

2025-04-10 14:39:10 +02:00

time

hrtimers: Mark is_migration_base() with __always_inline

2025-03-22 12:54:14 -07:00

trace

tracing: tprobe-events: Fix leakage of module refcount

2025-03-28 22:03:28 +01:00

.gitignore

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acct.c

acct: block access to kernel internal filesystems

2025-02-27 04:30:23 -08:00

async.c

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audit_fsnotify.c

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audit_tree.c

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audit_watch.c

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audit.c

audit: Make use of str_enabled_disabled() helper

2024-09-03 16:35:16 -04:00

audit.h

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auditfilter.c

audit: use task_tgid_nr() instead of task_pid_nr()

2024-08-28 16:48:28 -04:00

auditsc.c

audit: use task_tgid_nr() instead of task_pid_nr()

2024-08-28 16:48:28 -04:00

backtracetest.c

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bounds.c

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capability.c

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cfi.c

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compat.c

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configs.c

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context_tracking.c

context_tracking, rcu: Rename rcu_dyntick trace event into rcu_watching

2024-08-15 21:30:43 +05:30

cpu_pm.c

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cpu.c

watchdog/hardlockup/perf: Fix perf_event memory leak

2025-04-10 14:39:11 +02:00

crash_core.c

Document/kexec: generalize crash hotplug description

2024-09-01 20:43:37 -07:00

crash_reserve.c

crash: fix crash memory reserve exceed system memory bug

2024-09-01 20:43:30 -07:00

cred.c

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delayacct.c

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dma.c

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elfcorehdr.c

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exec_domain.c

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exit.c

Merge tag 'mm-stable-2024-09-20-02-31' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2024-09-21 07:29:05 -07:00

exit.h

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extable.c

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fail_function.c

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fork.c

fork: avoid inappropriate uprobe access to invalid mm

2025-01-02 10:34:10 +01:00

freezer.c

sched/fair: Fix external p->on_rq users

2024-10-14 09:14:35 +02:00

gen_kheaders.sh

kheaders: Ignore silly-rename files

2025-01-23 17:22:55 +01:00

groups.c

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hung_task.c

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iomem.c

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irq_work.c

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jump_label.c

jump_label: Fix static_key_slow_dec() yet again

2024-09-10 11:57:27 +02:00

kallsyms_internal.h

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kallsyms_selftest.c

kallsyms: Match symbols exactly with CONFIG_LTO_CLANG

2024-08-15 09:33:35 -07:00

kallsyms_selftest.h

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kallsyms.c

kallsyms: Match symbols exactly with CONFIG_LTO_CLANG

2024-08-15 09:33:35 -07:00

kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.kexec

crash, powerpc: default to CRASH_DUMP=n on PPC_BOOK3S_32

2024-11-14 22:43:48 -08:00

Kconfig.locks

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Kconfig.preempt

sched_ext: Build fix on !CONFIG_STACKTRACE[_SUPPORT]

2024-08-01 07:08:01 -10:00

kcov.c

kcov: mark in_softirq_really() as __always_inline

2025-01-09 13:33:49 +01:00

kexec_core.c

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kexec_elf.c

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kexec_file.c

kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y

2024-09-01 17:59:01 -07:00

kexec_internal.h

kexec: use atomic_try_cmpxchg_acquire() in kexec_trylock()

2024-09-01 20:43:23 -07:00

kexec.c

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kheaders.c

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kprobes.c

kprobes: Fix to check symbol prefixes correctly

2024-08-05 14:04:03 +09:00

ksyms_common.c

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ksysfs.c

profiling: remove prof_cpu_mask

2024-07-29 10:45:54 -07:00

kthread.c

kthread: unpark only parked kthread

2024-10-09 12:47:19 -07:00

latencytop.c

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Makefile

mm: move kernel/numa.c to mm/

2024-09-03 21:15:26 -07:00

module_signature.c

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notifier.c

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nsproxy.c

introduce fd_file(), convert all accessors to it.

2024-08-12 22:00:43 -04:00

padata.c

padata: avoid UAF for reorder_work

2025-02-08 09:57:35 +01:00

panic.c

Merge tag 'drm-next-2024-09-19' of https://gitlab.freedesktop.org/drm/kernel

2024-09-19 10:18:15 +02:00

params.c

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pid_namespace.c

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pid_sysctl.h

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pid.c

introduce fd_file(), convert all accessors to it.

2024-08-12 22:00:43 -04:00

profile.c

profiling: remove profile=sleep support

2024-08-04 13:36:28 -07:00

ptrace.c

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range.c

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reboot.c

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regset.c

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relay.c

[tree-wide] finally take no_llseek out

2024-09-27 08:18:43 -07:00

resource_kunit.c

resource, kunit: fix user-after-free in resource_test_region_intersects()

2024-10-09 12:47:19 -07:00

resource.c

resource,kexec: walk_system_ram_res_rev must retain resource flags

2024-10-28 21:40:40 -07:00

rseq.c

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scftorture.c

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scs.c

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seccomp.c

seccomp: passthrough uretprobe systemcall without filtering

2025-02-17 10:05:12 +01:00

signal.c

posix-timers: Target group sigqueue to current task only if not exiting

2024-12-09 10:41:16 +01:00

smp.c

smp: print only local CPU info when sched_clock goes backward

2024-08-15 00:06:48 +05:30

smpboot.c

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smpboot.h

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softirq.c

softirq: Allow raising SCHED_SOFTIRQ from SMP-call-function on RT kernel

2024-12-14 20:04:16 +01:00

stackleak.c

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stacktrace.c

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static_call_inline.c

x86/static-call: provide a way to do very early static-call updates

2024-12-19 18:13:23 +01:00

static_call.c

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stop_machine.c

rcu: Rename rcu_momentary_dyntick_idle() into rcu_momentary_eqs()

2024-08-15 21:30:42 +05:30

sys_ni.c

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sys.c

Merge tag 'pull-stable-struct_fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2024-09-23 09:35:36 -07:00

sysctl-test.c

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sysctl.c

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task_work.c

sched/core: Disable page allocation in task_tick_mm_cid()

2024-10-11 10:49:32 +02:00

taskstats.c

introduce fd_file(), convert all accessors to it.

2024-08-12 22:00:43 -04:00

torture.c

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tracepoint.c

tracepoint: Support iterating tracepoints in a loading module

2024-09-25 23:23:44 +09:00

tsacct.c

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ucount.c

signal: restore the override_rlimit logic

2024-11-07 14:14:59 -08:00

uid16.c

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uid16.h

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umh.c

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up.c

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user_namespace.c

user_namespace: use kmemdup_array() instead of kmemdup() for multiple allocation

2024-09-09 16:47:42 -07:00

user-return-notifier.c

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user.c

uidgid: make sure we fit into one cacheline

2024-09-12 12:16:09 +02:00

usermode_driver.c

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utsname_sysctl.c

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utsname.c

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vhost_task.c

vhost: return task creation error instead of NULL

2025-03-22 12:54:21 -07:00

vmcore_info.c

mm: support only one page_type per page

2024-09-03 21:15:43 -07:00

watch_queue.c

watch_queue: fix pipe accounting mismatch

2025-04-10 14:39:10 +02:00

watchdog_buddy.c

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watchdog_perf.c

watchdog/hardlockup/perf: Fix perf_event memory leak

2025-04-10 14:39:11 +02:00

watchdog.c

watchdog/hardlockup/perf: Fix perf_event memory leak

2025-04-10 14:39:11 +02:00

workqueue_internal.h

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workqueue.c

workqueue: Put the pwq after detaching the rescuer from the pool

2025-02-21 14:01:18 +01:00