[PATCH] powerpc: Export mmu_feature_keys[] as non-GPL

From: Kevin Hao <haokexin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nathaniel Filardo <nwfilardo@gmail.com>,
	Paul Mackerras <paulus@samba.org>
Subject: [PATCH] powerpc: Export mmu_feature_keys[] as non-GPL
Date: Tue, 29 Mar 2022 16:57:09 +0800	[thread overview]
Message-ID: <20220329085709.4132729-1-haokexin@gmail.com> (raw)

When the mmu_feature_keys[] was introduced in the commit c12e6f24d413
("powerpc: Add option to use jump label for mmu_has_feature()"),
it is unlikely that it would be used either directly or indirectly in
the out of tree modules. So we export it as GPL only. But with the
evolution of the codes, especially the PPC_KUAP support, it may be
indirectly referenced by some primitive macro or inline functions such
as get_user() or __copy_from_user_inatomic(), this will make it
impossible to build many non GPL modules (such as ZFS) on ppc
architecture. Fix this by exposing the mmu_feature_keys[] to the
non-GPL modules too.

Reported-by: Nathaniel Filardo <nwfilardo@gmail.com>
Signed-off-by: Kevin Hao <haokexin@gmail.com>
---
 arch/powerpc/kernel/cputable.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index ae0fdef0ac11..3a8cd40b6368 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2119,7 +2119,7 @@ void __init cpu_feature_keys_init(void)
 struct static_key_true mmu_feature_keys[NUM_MMU_FTR_KEYS] = {
 			[0 ... NUM_MMU_FTR_KEYS - 1] = STATIC_KEY_TRUE_INIT
 };
-EXPORT_SYMBOL_GPL(mmu_feature_keys);
+EXPORT_SYMBOL(mmu_feature_keys);
 
 void __init mmu_feature_keys_init(void)
 {
-- 
2.34.1

