linux-kernel - [PATCH 2/2] LoongArch: Remove is_entry_func() and kernel_entry

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Message-ID: <20251224103516.12654-3-yangtiezhu@loongson.cn>
Date: Wed, 24 Dec 2025 18:35:16 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>,
	loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] LoongArch: Remove is_entry_func() and kernel_entry_end

For now, the related codes of is_entry_func() are useless, so they can be
removed. Then the symbol kernel_entry_end is not used any more, so it can
be removed too.

Link: https://lore.kernel.org/lkml/kjiyla6qj3l7ezspitulrdoc5laj2e6hoecvd254hssnpddczm@g6nkaombh6va/
Suggested-by: Josh Poimboeuf <jpoimboe@...nel.org>
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/loongarch/kernel/head.S       |  2 --
 arch/loongarch/kernel/unwind_orc.c | 11 -----------
 2 files changed, 13 deletions(-)

diff --git a/arch/loongarch/kernel/head.S b/arch/loongarch/kernel/head.S
index ce7f6c04f4ab..7f288e89573b 100644
--- a/arch/loongarch/kernel/head.S
+++ b/arch/loongarch/kernel/head.S
@@ -144,5 +144,3 @@ SYM_CODE_START(smpboot_entry)
 SYM_CODE_END(smpboot_entry)
 
 #endif /* CONFIG_SMP */
-
-SYM_ENTRY(kernel_entry_end, SYM_L_GLOBAL, SYM_A_NONE)
diff --git a/arch/loongarch/kernel/unwind_orc.c b/arch/loongarch/kernel/unwind_orc.c
index 0d5fa64a2225..710f82d73797 100644
--- a/arch/loongarch/kernel/unwind_orc.c
+++ b/arch/loongarch/kernel/unwind_orc.c
@@ -348,14 +348,6 @@ void unwind_start(struct unwind_state *state, struct task_struct *task,
 }
 EXPORT_SYMBOL_GPL(unwind_start);
 
-static bool is_entry_func(unsigned long addr)
-{
-	extern u32 kernel_entry;
-	extern u32 kernel_entry_end;
-
-	return addr >= (unsigned long)&kernel_entry && addr < (unsigned long)&kernel_entry_end;
-}
-
 static inline unsigned long bt_address(unsigned long ra)
 {
 	extern unsigned long eentry;
@@ -402,9 +394,6 @@ bool unwind_next_frame(struct unwind_state *state)
 	/* Don't let modules unload while we're reading their ORC data. */
 	guard(rcu)();
 
-	if (is_entry_func(state->pc))
-		goto end;
-
 	orc = orc_find(state->pc);
 	if (!orc) {
 		/*
-- 
2.42.0