[PATCH v16 14/18] arm64: syscall: Simplify syscall exit path in el0_svc_common()

[Jinjie Ruan]

Remove the redundant conditional fast-path check within el0_svc_common()
as both branches now execute the exact the same
syscall_exit_to_user_mode_work().

Since both the conditional fast-path and the fallback slow-path now
uniformly invoke syscall_exit_to_user_mode_work(), this explicit
conditional branch is entirely redundant regardless of whether
the evaluation is true or false. Removing it collapses the duplicated
logic into a single, unconditional path.

No functional changes.

Cc: Mark Rutland <mark.rutland at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Ada Couprie Diaz <ada.coupriediaz at arm.com>
Signed-off-by: Jinjie Ruan <ruanjinjie at huawei.com>
---
 arch/arm64/kernel/syscall.c | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/arch/arm64/kernel/syscall.c b/arch/arm64/kernel/syscall.c
index 74308b6df43b..275cde8ab6f4 100644
--- a/arch/arm64/kernel/syscall.c
+++ b/arch/arm64/kernel/syscall.c
@@ -114,17 +114,6 @@ static void el0_svc_common(struct pt_regs *regs, int scno, int sc_nr,
 	}
 
 	invoke_syscall(regs, scno, sc_nr, syscall_table);
-
-	/*
-	 * The tracing status may have changed under our feet, so we have to
-	 * check again. However, if we were tracing entry, then we always trace
-	 * exit regardless, as the old entry assembly did.
-	 */
-	if (!(unlikely(flags & _TIF_SYSCALL_WORK)) && !IS_ENABLED(CONFIG_DEBUG_RSEQ)) {
-		syscall_exit_to_user_mode_work(regs);
-		return;
-	}
-
 trace_exit:
 	syscall_exit_to_user_mode_work(regs);
 }
-- 
2.34.1