tizen: packaging: Add baselibs.conf to provide 64-bit kernel & modules for 32-bit...

[platform/kernel/linux-rpi.git] / mm / util.c

diff --git a/mm/util.c b/mm/util.c
index 8cbbfd3..be79898 100644 (file)
--- a/mm/util.c
+++ b/mm/util.c
@@ -414,6 +414,15 @@ static int mmap_is_legacy(struct rlimit *rlim_stack)
 
 static unsigned long mmap_base(unsigned long rnd, struct rlimit *rlim_stack)
 {
+#ifdef CONFIG_STACK_GROWSUP
+       /*
+        * For an upwards growing stack the calculation is much simpler.
+        * Memory for the maximum stack size is reserved at the top of the
+        * task. mmap_base starts directly below the stack and grows
+        * downwards.
+        */
+       return PAGE_ALIGN_DOWN(mmap_upper_limit(rlim_stack) - rnd);
+#else
        unsigned long gap = rlim_stack->rlim_cur;
        unsigned long pad = stack_guard_gap;
 
@@ -431,6 +440,7 @@ static unsigned long mmap_base(unsigned long rnd, struct rlimit *rlim_stack)
                gap = MAX_GAP;
 
        return PAGE_ALIGN(STACK_TOP - gap - rnd);
+#endif
 }
 
 void arch_pick_mmap_layout(struct mm_struct *mm, struct rlimit *rlim_stack)