linux-kernel - [PATCH] sched_ext: Add __weak to fix the build errors

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Message-Id: <20241129091003.87716-1-jameshongleiwang@126.com>
Date: Fri, 29 Nov 2024 17:10:03 +0800
From: Honglei Wang <jameshongleiwang@....com>
To: tj@...nel.org,
	void@...ifault.com
Cc: nathan@...nel.org,
	ndesaulniers@...gle.com,
	morbo@...gle.com,
	justinstitt@...gle.com,
	haoluo@...gle.com,
	brho@...gle.com,
	joshdon@...gle.com,
	vishalc@...ux.ibm.com,
	hongyan.xia2@....com,
	linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	llvm@...ts.linux.dev,
	jameshongleiwang@....com
Subject: [PATCH] sched_ext: Add __weak to fix the build errors

commit 5cbb302880f5 ("sched_ext: Rename
scx_bpf_dispatch[_vtime]_from_dsq*() -> scx_bpf_dsq_move[_vtime]*()")
introduced several new functions which caused compilation errors when
compiled with clang.

Let's fix this by adding __weak markers.

Signed-off-by: Honglei Wang <jameshongleiwang@....com>
---
 tools/sched_ext/include/scx/common.bpf.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/include/scx/common.bpf.h
index 2f36b7b6418d..625f5b046776 100644
--- a/tools/sched_ext/include/scx/common.bpf.h
+++ b/tools/sched_ext/include/scx/common.bpf.h
@@ -40,9 +40,9 @@ void scx_bpf_dsq_insert(struct task_struct *p, u64 dsq_id, u64 slice, u64 enq_fl
 void scx_bpf_dsq_insert_vtime(struct task_struct *p, u64 dsq_id, u64 slice, u64 vtime, u64 enq_flags) __ksym __weak;
 u32 scx_bpf_dispatch_nr_slots(void) __ksym;
 void scx_bpf_dispatch_cancel(void) __ksym;
-bool scx_bpf_dsq_move_to_local(u64 dsq_id) __ksym;
-void scx_bpf_dsq_move_set_slice(struct bpf_iter_scx_dsq *it__iter, u64 slice) __ksym;
-void scx_bpf_dsq_move_set_vtime(struct bpf_iter_scx_dsq *it__iter, u64 vtime) __ksym;
+bool scx_bpf_dsq_move_to_local(u64 dsq_id) __ksym __weak;
+void scx_bpf_dsq_move_set_slice(struct bpf_iter_scx_dsq *it__iter, u64 slice) __ksym __weak;
+void scx_bpf_dsq_move_set_vtime(struct bpf_iter_scx_dsq *it__iter, u64 vtime) __ksym __weak;
 bool scx_bpf_dsq_move(struct bpf_iter_scx_dsq *it__iter, struct task_struct *p, u64 dsq_id, u64 enq_flags) __ksym __weak;
 bool scx_bpf_dsq_move_vtime(struct bpf_iter_scx_dsq *it__iter, struct task_struct *p, u64 dsq_id, u64 enq_flags) __ksym __weak;
 u32 scx_bpf_reenqueue_local(void) __ksym;
-- 
2.45.2