parisc: Consider stack randomization for mmap base only when necessary

Do not offset mmap base address because of stack randomization if
current task does not want randomization.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
index 376ea0d..4407ac4 100644 (file)
--- a/arch/parisc/kernel/sys_parisc.c
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -86,7 +86,8 @@ static unsigned long mmap_upper_limit(struct rlimit *rlim_stack)
                stack_base = STACK_SIZE_MAX;
 
        /* Add space for stack randomization. */
-       stack_base += (STACK_RND_MASK << PAGE_SHIFT);
+       if (current->flags & PF_RANDOMIZE)
+               stack_base += (STACK_RND_MASK << PAGE_SHIFT);
 
        return PAGE_ALIGN(STACK_TOP - stack_base);
 }