linux-kernel - [PATCH] rv: Support systems with time64-only syscalls

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Message-ID: <20250804194518.97620-2-palmer@dabbelt.com>
Date: Mon,  4 Aug 2025 12:45:19 -0700
From: Palmer Dabbelt <palmer@...belt.com>
To: rostedt@...dmis.org, namcao@...utronix.de
Cc: mhiramat@...nel.org, mathieu.desnoyers@...icios.com,
  Palmer Dabbelt <palmer@...belt.com>, gmonaco@...hat.com, linux-trace-kernel@...r.kernel.org,
  linux-kernel@...r.kernel.org
Subject: [PATCH] rv: Support systems with time64-only syscalls

From: Palmer Dabbelt <palmer@...belt.com>

Some systems (like 32-bit RISC-V) only have the 64-bit time_t versions
of syscalls.  So handle the 32-bit time_t version of those being
undefined.

Fixes: f74f8bb246cf ("rv: Add rtapp_sleep monitor")
Signed-off-by: Palmer Dabbelt <palmer@...belt.com>
---
This seems a little ugly, as it'll blow up when neither is defined.  Some
#if/#error type stuff seemed uglier, though, and that's the best I could come
up with.  I figure anyone without either flavor of futex call is probably deep
enough in the weeds to just figure what blows up here...
---
 kernel/trace/rv/monitors/sleep/sleep.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/kernel/trace/rv/monitors/sleep/sleep.c b/kernel/trace/rv/monitors/sleep/sleep.c
index eea447b06907..c1347da69e9d 100644
--- a/kernel/trace/rv/monitors/sleep/sleep.c
+++ b/kernel/trace/rv/monitors/sleep/sleep.c
@@ -127,7 +127,9 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
 	mon = ltl_get_monitor(current);
 
 	switch (id) {
+#ifdef __NR_clock_nanosleep
 	case __NR_clock_nanosleep:
+#endif
 #ifdef __NR_clock_nanosleep_time64
 	case __NR_clock_nanosleep_time64:
 #endif
@@ -138,7 +140,9 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
 		ltl_atom_update(current, LTL_CLOCK_NANOSLEEP, true);
 		break;
 
+#ifdef __NR_futex
 	case __NR_futex:
+#endif
 #ifdef __NR_futex_time64
 	case __NR_futex_time64:
 #endif
-- 
2.50.1