linux-kernel - [RFC PATCH V3 30/43] rv64ilp32_abi: kernel/smp: Disable CSD_LOCK_WAIT

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Message-Id: <20250325121624.523258-31-guoren@kernel.org>
Date: Tue, 25 Mar 2025 08:16:11 -0400
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Subject: [RFC PATCH V3 30/43] rv64ilp32_abi: kernel/smp: Disable CSD_LOCK_WAIT_DEBUG

From: "Guo Ren (Alibaba DAMO Academy)" <guoren@...nel.org>

The rv64ilp32 abi is based on CONFIG_64BIT, but uses ILP32 for a
smaller cache & memory footprint. So, disable CSD_LOCK_WAIT_DEBUG
to get smaller csd struct.

Signed-off-by: Guo Ren (Alibaba DAMO Academy) <guoren@...nel.org>
---
 include/linux/smp_types.h | 2 +-
 lib/Kconfig.debug         | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/smp_types.h b/include/linux/smp_types.h
index 2e8461af8df6..5912b694059f 100644
--- a/include/linux/smp_types.h
+++ b/include/linux/smp_types.h
@@ -61,7 +61,7 @@ struct __call_single_node {
 		unsigned int	u_flags;
 		atomic_t	a_flags;
 	};
-#ifdef CONFIG_64BIT
+#if BITS_PER_LONG == 64
 	u16 src, dst;
 #endif
 };
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 1af972a92d06..f55f0ded826c 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1613,6 +1613,7 @@ config CSD_LOCK_WAIT_DEBUG
 	depends on DEBUG_KERNEL
 	depends on SMP
 	depends on 64BIT
+	depends on !ABI_RV64ILP32
 	default n
 	help
 	  This option enables debug prints when CPUs are slow to respond
-- 
2.40.1