From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Michael Jeanson <mjeanson@efficios.com>,
Jens Axboe <axboe@kernel.dk>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
x86@kernel.org, Sean Christopherson <seanjc@google.com>,
Wei Liu <wei.liu@kernel.org>
Subject: [patch V5 04/31] rseq: Remove the ksig argument from rseq_handle_notify_resume()
Date: Wed, 22 Oct 2025 14:52:05 +0200 (CEST) [thread overview]
Message-ID: <20251022121941.624112132@linutronix.de> (raw)
In-Reply-To: <20251022121836.019469732@linutronix.de>
There is no point for this being visible in the resume_to_user_mode()
handling.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
---
include/linux/resume_user_mode.h | 2 +-
include/linux/rseq.h | 13 +++++++------
2 files changed, 8 insertions(+), 7 deletions(-)
--- a/include/linux/resume_user_mode.h
+++ b/include/linux/resume_user_mode.h
@@ -59,7 +59,7 @@ static inline void resume_user_mode_work
mem_cgroup_handle_over_high(GFP_KERNEL);
blkcg_maybe_throttle_current();
- rseq_handle_notify_resume(NULL, regs);
+ rseq_handle_notify_resume(regs);
}
#endif /* LINUX_RESUME_USER_MODE_H */
--- a/include/linux/rseq.h
+++ b/include/linux/rseq.h
@@ -37,19 +37,20 @@ static inline void rseq_set_notify_resum
void __rseq_handle_notify_resume(struct ksignal *sig, struct pt_regs *regs);
-static inline void rseq_handle_notify_resume(struct ksignal *ksig,
- struct pt_regs *regs)
+static inline void rseq_handle_notify_resume(struct pt_regs *regs)
{
if (current->rseq)
- __rseq_handle_notify_resume(ksig, regs);
+ __rseq_handle_notify_resume(NULL, regs);
}
static inline void rseq_signal_deliver(struct ksignal *ksig,
struct pt_regs *regs)
{
- scoped_guard(RSEQ_EVENT_GUARD)
- __set_bit(RSEQ_EVENT_SIGNAL_BIT, ¤t->rseq_event_mask);
- rseq_handle_notify_resume(ksig, regs);
+ if (current->rseq) {
+ scoped_guard(RSEQ_EVENT_GUARD)
+ __set_bit(RSEQ_EVENT_SIGNAL_BIT, ¤t->rseq_event_mask);
+ __rseq_handle_notify_resume(ksig, regs);
+ }
}
/* rseq_preempt() requires preemption to be disabled. */
next prev parent reply other threads:[~2025-10-22 12:52 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-22 12:52 [patch V5 00/31] rseq: Optimize exit to user space Thomas Gleixner
2025-10-22 12:52 ` [patch V5 01/31] rseq: Avoid pointless evaluation in __rseq_notify_resume() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 02/31] rseq: Condense the inline stubs Thomas Gleixner
2025-10-22 12:52 ` [patch V5 03/31] rseq: Move algorithm comment to top Thomas Gleixner
2025-10-22 12:52 ` Thomas Gleixner [this message]
2025-10-22 12:52 ` [patch V5 05/31] rseq: Simplify registration Thomas Gleixner
2025-10-22 12:52 ` [patch V5 06/31] rseq: Simplify the event notification Thomas Gleixner
2025-10-22 12:52 ` [patch V5 07/31] rseq, virt: Retrigger RSEQ after vcpu_run() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 08/31] rseq: Avoid CPU/MM CID updates when no event pending Thomas Gleixner
2025-10-22 12:52 ` [patch V5 09/31] rseq: Introduce struct rseq_data Thomas Gleixner
2025-10-22 12:52 ` [patch V5 10/31] entry: Cleanup header Thomas Gleixner
2025-10-22 12:52 ` [patch V5 11/31] entry: Remove syscall_enter_from_user_mode_prepare() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 12/31] entry: Inline irqentry_enter/exit_from/to_user_mode() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 13/31] sched: Move MM CID related functions to sched.h Thomas Gleixner
2025-10-22 12:52 ` [patch V5 14/31] rseq: Cache CPU ID and MM CID values Thomas Gleixner
2025-10-22 12:52 ` [patch V5 15/31] rseq: Record interrupt from user space Thomas Gleixner
2025-10-22 12:52 ` [patch V5 16/31] rseq: Provide tracepoint wrappers for inline code Thomas Gleixner
2025-10-22 12:52 ` [patch V5 17/31] rseq: Expose lightweight statistics in debugfs Thomas Gleixner
2025-10-22 12:52 ` [patch V5 18/31] rseq: Provide static branch for runtime debugging Thomas Gleixner
2025-10-22 12:52 ` [patch V5 19/31] rseq: Provide and use rseq_update_user_cs() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 20/31] rseq: Replace the original debug implementation Thomas Gleixner
2025-10-22 12:52 ` [patch V5 21/31] rseq: Make exit debugging static branch based Thomas Gleixner
2025-10-22 12:52 ` [patch V5 22/31] rseq: Use static branch for syscall exit debug when GENERIC_IRQ_ENTRY=y Thomas Gleixner
2025-10-22 12:52 ` [patch V5 23/31] rseq: Provide and use rseq_set_ids() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 24/31] rseq: Separate the signal delivery path Thomas Gleixner
2025-10-22 12:52 ` [patch V5 25/31] rseq: Rework the TIF_NOTIFY handler Thomas Gleixner
2025-10-22 13:31 ` Sean Christopherson
2025-10-22 12:52 ` [patch V5 26/31] rseq: Optimize event setting Thomas Gleixner
2025-10-22 12:52 ` [patch V5 27/31] rseq: Implement fast path for exit to user Thomas Gleixner
2025-10-23 8:51 ` Peter Zijlstra
2025-10-22 12:52 ` [patch V5 28/31] rseq: Switch to fast path processing on " Thomas Gleixner
2025-10-23 9:04 ` Peter Zijlstra
2025-10-22 12:52 ` [patch V5 29/31] entry: Split up exit_to_user_mode_prepare() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 30/31] rseq: Split up rseq_exit_to_user_mode() Thomas Gleixner
2025-10-22 12:52 ` [patch V5 31/31] rseq: Switch to TIF_RSEQ if supported Thomas Gleixner
2025-10-23 9:22 ` [patch V5 00/31] rseq: Optimize exit to user space Peter Zijlstra
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