uml: stop specially protecting kernel stacks

Map all of physical memory as executable to avoid having to change stack
protections during fork and exit.

unprotect_stack is now called only from MODE_TT code, so it is marked as such.

Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/um/kernel/physmem.c b/arch/um/kernel/physmem.c
index 5ee7e851bbc1..8aeac4d93511 100644
--- a/arch/um/kernel/physmem.c
+++ b/arch/um/kernel/physmem.c
@@ -105,7 +105,7 @@ void __init setup_physmem(unsigned long start, unsigned long reserve_end,
 
         offset = uml_reserved - uml_physmem;
         err = os_map_memory((void *) uml_reserved, physmem_fd, offset,
-                            len - offset, 1, 1, 0);
+                            len - offset, 1, 1, 1);
         if(err < 0){
                 os_print_error(err, "Mapping memory");
                 exit(1);