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-rw-r--r--arch/s390/include/asm/elf.h8
-rw-r--r--arch/s390/mm/mmap.c11
2 files changed, 7 insertions, 12 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index c9c875d9ed31..f8db4781a4c2 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -161,10 +161,12 @@ extern unsigned int vdso_enabled;
/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
use of this is to invoke "./ld.so someprog" to test out a new version of
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. */
-
+ that it will "exec", and that there is sufficient room for the brk. 64-bit
+ tasks are aligned to 4GB. */
extern unsigned long randomize_et_dyn(void);
-#define ELF_ET_DYN_BASE randomize_et_dyn()
+#define ELF_ET_DYN_BASE (randomize_et_dyn() + (is_32bit_task() ? \
+ (STACK_TOP / 3 * 2) : \
+ (STACK_TOP / 3 * 2) & ~((1UL << 32) - 1)))
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. */
diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c
index a94504d99c47..8c11536f972d 100644
--- a/arch/s390/mm/mmap.c
+++ b/arch/s390/mm/mmap.c
@@ -179,17 +179,10 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0,
unsigned long randomize_et_dyn(void)
{
- unsigned long base;
-
- base = STACK_TOP / 3 * 2;
- if (!is_32bit_task())
- /* Align to 4GB */
- base &= ~((1UL << 32) - 1);
-
if (current->flags & PF_RANDOMIZE)
- base += arch_mmap_rnd();
+ return arch_mmap_rnd();
- return base;
+ return 0UL;
}
#ifndef CONFIG_64BIT