arm64: text replication: include most of read-only data as well

Include as much of the read-only data in the replication as we can
without needing to move away from the generic RO_DATA() macro in
the linker script.

Unfortunately, the read-only data section is immedaitely followed
by the read-only after init data with no page alignment, which
means we can't have separate mappings for the read-only data
section and everything else. Changing that would mean replacing
the generic RO_DATA() macro which increases the maintenance burden.

however, this is likely not worth the effort as the majority of
read-only data will be covered.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/arm64/mm/ktext.c b/arch/arm64/mm/ktext.c
index a07a03f36519..6ca7c4730893 100644
--- a/arch/arm64/mm/ktext.c
+++ b/arch/arm64/mm/ktext.c
@@ -122,7 +122,7 @@ void ktext_replication_patch_alternative(__le32 *src, int nr_inst)
 /* Allocate page tables and memory for the replicated kernel texts. */
 void __init ktext_replication_init(void)
 {
-	size_t size = _etext - _stext;
+	size_t size = __end_rodata - _stext;
 	int kidx = pgd_index((phys_addr_t)KERNEL_START);
 	int nid;