s390/vdso: map vdso also for statically linked binaries

s390 does not map the vdso for statically linked binaries, assuming
that this doesn't make sense. See commit fc5243d98ac2 ("[S390]
arch_setup_additional_pages arguments").

However with glibc commit d665367f596d ("linux: Enable vDSO for static
linking as default (BZ#19767)") and commit 5e855c895401 ("s390: Enable
VDSO for static linking") the vdso is also used for statically linked
binaries - if the kernel would make it available.

Therefore map the vdso always, just like all other architectures.

Reported-by: Stefan Liebler <stli@linux.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 243d8b1185bfcdbf39d0480aa7245f11c7eb89cc..c6bc190f3c28c967604fc50d099cc05f25278736 100644 (file)
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -216,11 +216,6 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 
        if (!vdso_enabled)
                return 0;
-       /*
-        * Only map the vdso for dynamically linked elf binaries.
-        */
-       if (!uses_interp)
-               return 0;
 
        vdso_pages = vdso64_pages;
 #ifdef CONFIG_COMPAT_VDSO