s390/mmap: increase stack/mmap gap to 128MB

This basically reverts commit 9e78a13bfb16 ("[S390] reduce miminum
gap between stack and mmap_base"). 32MB is not enough space
between stack and mmap for some programs. Given that compat
task aren't common these days, lets revert back to 128MB.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index e54f928..d545f5c 100644 (file)
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -58,9 +58,9 @@ static inline unsigned long mmap_base(unsigned long rnd,
 
        /*
         * Top of mmap area (just below the process stack).
-        * Leave at least a ~32 MB hole.
+        * Leave at least a ~128 MB hole.
         */
-       gap_min = 32 * 1024 * 1024UL;
+       gap_min = SZ_128M;
        gap_max = (STACK_TOP / 6) * 5;
 
        if (gap < gap_min)