[PATCH] arm64: vmlinux.lds.S: keep .entry.tramp.text section

[Arnd Bergmann]

From: Arnd Bergmann <arnd at arndb.de>

When building with CONFIG_LD_DEAD_CODE_DATA_ELIMINATION,
I sometimes see an assertion

 ld.lld: error: Entry trampoline text too big

This happens when any reference to the trampoline is discarded at link
time. Marking the section as KEEP() avoids the assertion, but I have
not figured out whether this is the correct solution for the underlying
problem.

Signed-off-by: Arnd Bergmann <arnd at arndb.de>
---
 arch/arm64/kernel/vmlinux.lds.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index 926cdb597a45..c5ee9d5842db 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -96,7 +96,7 @@ jiffies = jiffies_64;
 #define TRAMP_TEXT					\
 	. = ALIGN(PAGE_SIZE);				\
 	__entry_tramp_text_start = .;			\
-	*(.entry.tramp.text)				\
+	KEEP(*(.entry.tramp.text))			\
 	. = ALIGN(PAGE_SIZE);				\
 	__entry_tramp_text_end = .;
 #else
-- 
2.29.2