drm/radeon: fix page flipping hangs on r300/r400

[mv-sheeva.git] / mm / mmap.c

diff --git a/mm/mmap.c b/mm/mmap.c
index 73cc648873d6d00712457b7aa67d13db31b5c781..2ec8eb5a9cdd0b4ae2e20471858bd4e09d83af00 100644 (file)
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -254,7 +254,15 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
        down_write(&mm->mmap_sem);
 
 #ifdef CONFIG_COMPAT_BRK
-       min_brk = mm->end_code;
+       /*
+        * CONFIG_COMPAT_BRK can still be overridden by setting
+        * randomize_va_space to 2, which will still cause mm->start_brk
+        * to be arbitrarily shifted
+        */
+       if (mm->start_brk > PAGE_ALIGN(mm->end_data))
+               min_brk = mm->start_brk;
+       else
+               min_brk = mm->end_data;
 #else
        min_brk = mm->start_brk;
 #endif