[MINI-OS PATCH 10/12] kexec: switch read-only area to be writable again

[Juergen Gross <jgross@xxxxxxxx>]

In order to allow writing the new kernel, make the readonly area
covering current kernel text writable again.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
---
 kexec.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/kexec.c b/kexec.c
index 16a0030a..2992f58f 100644
--- a/kexec.c
+++ b/kexec.c
@@ -184,6 +184,8 @@ int kexec(void *kernel, unsigned long kernel_size, const 
char *cmdline)
         goto err;
     }
 
+    change_readonly(false);
+
     ret = kexec_move_used_pages(kexec_last_addr, (unsigned long)kernel,
                                 kernel_size);
     if ( ret )
@@ -193,6 +195,7 @@ int kexec(void *kernel, unsigned long kernel_size, const 
char *cmdline)
     ret = ENOSYS;
 
  err:
+    change_readonly(true);
     unreserve_memory_below();
     kexec_move_used_pages_undo();
     kexec_get_entry_undo();
-- 
2.43.0