From: Jessica Yu <jeyu@xxxxxxxxxx>
When __{start,end}_ro_after_init is referenced from C code, we run into the
following build errors on blackfin:
kernel/extable.c:169: undefined reference to `__start_ro_after_init'
kernel/extable.c:169: undefined reference to `__end_ro_after_init'
The build error is due to the fact that blackfin is one of the few arches
that prepends an underscore '_' to all symbols defined in C. Fix this by
wrapping __{start,end}_ro_after_init in vmlinux.lds.h with VMLINUX_SYMBOL(),
which adds the necessary prefix for arches that have HAVE_UNDERSCORE_SYMBOL_PREFIX.
Signed-off-by: Jessica Yu <jeyu@xxxxxxxxxx>
---
This patch is based on next-20170403.
include/asm-generic/vmlinux.lds.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 979b573..54918ae 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -261,9 +261,9 @@
*/
#ifndef RO_AFTER_INIT_DATA
#define RO_AFTER_INIT_DATA \
- __start_ro_after_init = .; \
+ VMLINUX_SYMBOL(__start_ro_after_init) = .; \
*(.data..ro_after_init) \
- __end_ro_after_init = .;
+ VMLINUX_SYMBOL(__end_ro_after_init) = .;
#endif
/*
--
2.5.5
