[tip: core/urgent] rseq: Always inline rseq_debug_syscall_return()

[tip-bot2 for Eric Dumazet]

The following commit has been merged into the core/urgent branch of tip:

Commit-ID:     bdae29d6512ddc589200b9ae6bda467bdbab863d
Gitweb:        https://git.kernel.org/tip/bdae29d6512ddc589200b9ae6bda467bdbab863d
Author:        Eric Dumazet <edumazet@xxxxxxxxxx>
AuthorDate:    Fri, 05 Dec 2025 10:07:53 
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Fri, 12 Dec 2025 10:26:26 +01:00

rseq: Always inline rseq_debug_syscall_return()

To get the full benefit of:

  eaa9088d568c ("rseq: Use static branch for syscall exit debug when GENERIC_IRQ_ENTRY=y")

clang needs an __always_inline instead of a plain inline qualifier:

	$ for i in {1..10}; do taskset -c 4 perf5 bench syscall basic -l 100000000 | grep "ops/sec"; done

		 Before	     After
	ops/sec  15424491    15872221   +2.9%

Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Link: https://patch.msgid.link/20251205100753.4073221-1-edumazet@xxxxxxxxxx
---
 include/linux/rseq_entry.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/rseq_entry.h b/include/linux/rseq_entry.h
index c92167f..a36b472 100644
--- a/include/linux/rseq_entry.h
+++ b/include/linux/rseq_entry.h
@@ -596,7 +596,7 @@ static __always_inline void rseq_exit_to_user_mode_legacy(void)
 
 void __rseq_debug_syscall_return(struct pt_regs *regs);
 
-static inline void rseq_debug_syscall_return(struct pt_regs *regs)
+static __always_inline void rseq_debug_syscall_return(struct pt_regs *regs)
 {
 	if (static_branch_unlikely(&rseq_debug_enabled))
 		__rseq_debug_syscall_return(regs);