arch: personality independent stack top

New arch macro STACK_TOP_MAX it gives the larges valid stack address for the
architecture in question.

It differs from STACK_TOP in that it will not distinguish between
personalities but will always return the largest possible address.

This is used to create the initial stack on execve, which we will move down to
the proper location once the binfmt code has figured out where that is.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ollie Wild <aaw@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/asm-frv/mem-layout.h b/include/asm-frv/mem-layout.h
index a025dd4514e7..aaf2a773d9d3 100644
--- a/include/asm-frv/mem-layout.h
+++ b/include/asm-frv/mem-layout.h
@@ -60,6 +60,7 @@
  */
 #define BRK_BASE                        __UL(2 * 1024 * 1024 + PAGE_SIZE)
 #define STACK_TOP                       __UL(2 * 1024 * 1024)
+#define STACK_TOP_MAX   STACK_TOP
 
 /* userspace process size */
 #ifdef CONFIG_MMU