On 03/12/2019 08:29 PM, Mathieu Malaterre wrote:
In commit 07d2a628bc00 ("powerpc/64s: Avoid cpabort in context switch
when possible") a buffer 'dummy_copy_buffer' was introduced. gcc does
not see this buffer being used in the inline assembly within function
'__switch_to', explicitly marked this variable as being used.
Prefer using '__aligned' to get passed line over 80 characters warning
in checkpatch.
Powerpc accepts 90 characters, use arch/powerpc/tools/checkpatch.sh
This remove the following warning:
arch/powerpc/kernel/process.c:1156:17: error: 'dummy_copy_buffer' defined
but not used [-Werror=unused-const-variable=]
commit 2bf1071a8d50 ("powerpc/64s: Remove POWER9 DD1 support") has
removed the fonction using 'dummy_copy_buffer' so you should remove it
completely.
Christophe
Cc: Nicholas Piggin <npig...@gmail.com>
Signed-off-by: Mathieu Malaterre <ma...@debian.org>
---
arch/powerpc/kernel/process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 77e44275d025..5acf63d45802 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1153,7 +1153,7 @@ static inline void restore_sprs(struct thread_struct
*old_thread,
#ifdef CONFIG_PPC_BOOK3S_64
#define CP_SIZE 128
-static const u8 dummy_copy_buffer[CP_SIZE] __attribute__((aligned(CP_SIZE)));
+static const u8 dummy_copy_buffer[CP_SIZE] __aligned(CP_SIZE) __used;
#endif
struct task_struct *__switch_to(struct task_struct *prev,
