From eaa9088d568c84afd72fa32dbe01833aef861d0d Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 27 Oct 2025 09:45:05 +0100 Subject: rseq: Use static branch for syscall exit debug when GENERIC_IRQ_ENTRY=y Make the syscall exit debug mechanism available via the static branch on architectures which utilize the generic entry code. Signed-off-by: Thomas Gleixner Signed-off-by: Peter Zijlstra (Intel) Signed-off-by: Ingo Molnar Reviewed-by: Mathieu Desnoyers Link: https://patch.msgid.link/20251027084307.333440475@linutronix.de --- kernel/rseq.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'kernel') diff --git a/kernel/rseq.c b/kernel/rseq.c index abd6bfadbcc6..97631554ae96 100644 --- a/kernel/rseq.c +++ b/kernel/rseq.c @@ -473,12 +473,11 @@ error: force_sigsegv(sig); } -#ifdef CONFIG_DEBUG_RSEQ /* * Terminate the process if a syscall is issued within a restartable * sequence. */ -void rseq_syscall(struct pt_regs *regs) +void __rseq_debug_syscall_return(struct pt_regs *regs) { struct task_struct *t = current; u64 csaddr; @@ -496,6 +495,13 @@ void rseq_syscall(struct pt_regs *regs) fail: force_sig(SIGSEGV); } + +#ifdef CONFIG_DEBUG_RSEQ +/* Kept around to keep GENERIC_ENTRY=n architectures supported. */ +void rseq_syscall(struct pt_regs *regs) +{ + __rseq_debug_syscall_return(regs); +} #endif /* -- cgit v1.2.3