linux-kernel - [PATCH] x86/paravirt: make BUG_func() usable by non-GPL modules

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Message-Id: <20240109082232.22657-1-jgross@suse.com>
Date: Tue,  9 Jan 2024 09:22:32 +0100
From: Juergen Gross <jgross@...e.com>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Juergen Gross <jgross@...e.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH] x86/paravirt: make BUG_func() usable by non-GPL modules

Several inlined functions subject to paravirt patching are referencing
BUG_func() since the recent switch to the alternative patching
mechanism.

As those functions can legally be used by non-GPL modules, BUG_func()
must be usable by those modules, too. So don't use EXPORT_SYMBOL_GPL()
for exporting BUG_func().

Fixes: 9824b00c2b58 ("x86/paravirt: Move some functions and defines to alternative.c")
Signed-off-by: Juergen Gross <jgross@...e.com>
---
 arch/x86/kernel/alternative.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 55e205b21271..692f597e414b 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -402,7 +402,7 @@ noinstr void BUG_func(void)
 {
 	BUG();
 }
-EXPORT_SYMBOL_GPL(BUG_func);
+EXPORT_SYMBOL(BUG_func);
 
 #define CALL_RIP_REL_OPCODE	0xff
 #define CALL_RIP_REL_MODRM	0x15
-- 
2.35.3