linux-kernel - [PATCH 3/5] sched_ext: make __bpf_ops_sched_ext

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Message-ID: <20251231173633.3981832-4-csander@purestorage.com>
Date: Wed, 31 Dec 2025 10:36:31 -0700
From: Caleb Sander Mateos <csander@...estorage.com>
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Cc: linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	netdev@...r.kernel.org,
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	linux-arm-kernel@...ts.infradead.org,
	Caleb Sander Mateos <csander@...estorage.com>
Subject: [PATCH 3/5] sched_ext: make __bpf_ops_sched_ext_ops const

Now that struct bpf_struct_ops's cfi_stubs field is a const pointer,
declare the __bpf_ops_sched_ext_ops global variable it points to as
const. This allows the global variable to be placed in readonly memory.

Signed-off-by: Caleb Sander Mateos <csander@...estorage.com>
---
 kernel/sched/ext.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c
index 94164f2dec6d..af8250b64f47 100644
--- a/kernel/sched/ext.c
+++ b/kernel/sched/ext.c
@@ -5336,11 +5336,11 @@ static s32 sched_ext_ops__init(void) { return -EINVAL; }
 static void sched_ext_ops__exit(struct scx_exit_info *info) {}
 static void sched_ext_ops__dump(struct scx_dump_ctx *ctx) {}
 static void sched_ext_ops__dump_cpu(struct scx_dump_ctx *ctx, s32 cpu, bool idle) {}
 static void sched_ext_ops__dump_task(struct scx_dump_ctx *ctx, struct task_struct *p) {}
 
-static struct sched_ext_ops __bpf_ops_sched_ext_ops = {
+static const struct sched_ext_ops __bpf_ops_sched_ext_ops = {
 	.select_cpu		= sched_ext_ops__select_cpu,
 	.enqueue		= sched_ext_ops__enqueue,
 	.dequeue		= sched_ext_ops__dequeue,
 	.dispatch		= sched_ext_ops__dispatch,
 	.tick			= sched_ext_ops__tick,
-- 
2.45.2