[PATCH v2] powerpc/64s: Remove 'dummy_copy_buffer'

[Mathieu Malaterre <malat@debian.org>]

In commit 2bf1071a8d50 ("powerpc/64s: Remove POWER9 DD1 support") the
function __switch_to remove usage for 'dummy_copy_buffer'. Since it is
not used anywhere else, remove it completely.

This remove the following warning:

  arch/powerpc/kernel/process.c:1156:17: error: 'dummy_copy_buffer' defined but not used [-Werror=unused-const-variable=]

Cc: Nicholas Piggin <npiggin@gmail.com>
Suggested-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Mathieu Malaterre <malat@debian.org>
---
v2: complely remove dummy_copy_buffer instead of marking it as used (since not anymore)
 arch/powerpc/kernel/process.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 77e44275d025..b2f0daa2fcf1 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1151,11 +1151,6 @@ static inline void restore_sprs(struct thread_struct *old_thread,
 	thread_pkey_regs_restore(new_thread, old_thread);
 }
 
-#ifdef CONFIG_PPC_BOOK3S_64
-#define CP_SIZE 128
-static const u8 dummy_copy_buffer[CP_SIZE] __attribute__((aligned(CP_SIZE)));
-#endif
-
 struct task_struct *__switch_to(struct task_struct *prev,
 	struct task_struct *new)
 {
-- 
2.20.1