Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
rseq: Avoid CPU/MM CID updates when no event pending
There is no need to update these values unconditionally if there is no
event pending.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20251027084306.462964916@linutronix.de
authored by
Thomas Gleixner
and committed by
Ingo Molnar
566d8015
83409986
+6
-5
+6
-5
kernel/rseq.c
+6
-5
kernel/rseq.c
···
464
464
t->rseq_event_pending = false;
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}
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467
-
if (IS_ENABLED(CONFIG_DEBUG_RSEQ) || event) {
468
-
ret = rseq_ip_fixup(regs, event);
469
-
if (unlikely(ret < 0))
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-
goto error;
471
-
}
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+
if (!IS_ENABLED(CONFIG_DEBUG_RSEQ) && !event)
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+
return;
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+
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+
ret = rseq_ip_fixup(regs, event);
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+
if (unlikely(ret < 0))
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+
goto error;
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if (unlikely(rseq_update_cpu_node_id(t)))
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goto error;