s390: avoid z13 cache aliasing

Avoid cache aliasing on z13 by aligning shared objects to multiples
of 512K. The virtual addresses of a page from a shared file needs
to have identical bits in the range 2^12 to 2^18.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 0 insertions, 10 deletions

diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index aa7a83948c7b..2c1eb4f3aaf5 100644
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -243,13 +243,3 @@ unsigned long arch_randomize_brk(struct mm_struct *mm)
 	ret = PAGE_ALIGN(mm->brk + brk_rnd());
 	return (ret > mm->brk) ? ret : mm->brk;
 }
-
-unsigned long randomize_et_dyn(unsigned long base)
-{
-	unsigned long ret;
-
-	if (!(current->flags & PF_RANDOMIZE))
-		return base;
-	ret = PAGE_ALIGN(base + brk_rnd());
-	return (ret > base) ? ret : base;
-}