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-rw-r--r--arch/s390/include/asm/elf.h8
-rw-r--r--arch/s390/include/asm/pgtable.h4
2 files changed, 9 insertions, 3 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index f6e43d39e3d8..c9df40b5c0ac 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -163,8 +163,8 @@ extern unsigned int vdso_enabled;
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
-extern unsigned long randomize_et_dyn(unsigned long base);
-#define ELF_ET_DYN_BASE (randomize_et_dyn(STACK_TOP / 3 * 2))
+extern unsigned long randomize_et_dyn(void);
+#define ELF_ET_DYN_BASE randomize_et_dyn()
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. */
@@ -209,7 +209,9 @@ do { \
} while (0)
#endif /* CONFIG_COMPAT */
-#define STACK_RND_MASK 0x7ffUL
+extern unsigned long mmap_rnd_mask;
+
+#define STACK_RND_MASK (mmap_rnd_mask)
#define ARCH_DLINFO \
do { \
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 5e102422c9ab..b8641b41e19c 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -1779,6 +1779,10 @@ extern int s390_enable_sie(void);
extern int s390_enable_skey(void);
extern void s390_reset_cmma(struct mm_struct *mm);
+/* s390 has a private copy of get unmapped area to deal with cache synonyms */
+#define HAVE_ARCH_UNMAPPED_AREA
+#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN
+
/*
* No page table caches to initialise
*/