s390/uaccess: remove pointless access_ok() checks

access_ok() always returns 'true' on s390. Therefore all calls
are quite pointless and can be removed.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

2 files changed, 0 insertions, 22 deletions

diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 3e71194c1902..6de049fbe62d 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -53,9 +53,6 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
 {
         int err;
 
-        if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
-                return -EFAULT;
-
         /* If you change siginfo_t structure, please be sure
            this code is fixed accordingly.
            It should never copy any pad contained in the structure
@@ -110,9 +107,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
         int err;
         u32 tmp;
 
-        if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t)))
-                return -EFAULT;
-
         err = __get_user(to->si_signo, &from->si_signo);
         err |= __get_user(to->si_errno, &from->si_errno);
         err |= __get_user(to->si_code, &from->si_code);
@@ -244,8 +238,6 @@ asmlinkage long sys32_sigreturn(void)
         sigframe32 __user *frame = (sigframe32 __user *)regs->gprs[15];
         sigset_t set;
 
-        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-                goto badframe;
         if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE32))
                 goto badframe;
         set_current_blocked(&set);
@@ -265,8 +257,6 @@ asmlinkage long sys32_rt_sigreturn(void)
         rt_sigframe32 __user *frame = (rt_sigframe32 __user *)regs->gprs[15];
         sigset_t set;
 
-        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-                goto badframe;
         if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
         set_current_blocked(&set);
@@ -325,8 +315,6 @@ static int setup_frame32(int sig, struct k_sigaction *ka,
                         sigset_t *set, struct pt_regs * regs)
 {
         sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(sigframe32));
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe32)))
-                goto give_sigsegv;
 
         if (frame == (void __user *) -1UL)
                 goto give_sigsegv;
@@ -391,8 +379,6 @@ static int setup_rt_frame32(int sig, struct k_sigaction *ka, siginfo_t *info,
 {
         int err = 0;
         rt_sigframe32 __user *frame = get_sigframe(ka, regs, sizeof(rt_sigframe32));
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe32)))
-                goto give_sigsegv;
 
         if (frame == (void __user *) -1UL)
                 goto give_sigsegv;
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 9c6e747a5e1e..c45becf82e01 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -116,8 +116,6 @@ SYSCALL_DEFINE0(sigreturn)
         sigframe __user *frame = (sigframe __user *)regs->gprs[15];
         sigset_t set;
 
-        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-                goto badframe;
         if (__copy_from_user(&set.sig, &frame->sc.oldmask, _SIGMASK_COPY_SIZE))
                 goto badframe;
         set_current_blocked(&set);
@@ -135,8 +133,6 @@ SYSCALL_DEFINE0(rt_sigreturn)
         rt_sigframe __user *frame = (rt_sigframe __user *)regs->gprs[15];
         sigset_t set;
 
-        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
-                goto badframe;
         if (__copy_from_user(&set.sig, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
         set_current_blocked(&set);
@@ -195,8 +191,6 @@ static int setup_frame(int sig, struct k_sigaction *ka,
         sigframe __user *frame;
 
         frame = get_sigframe(ka, regs, sizeof(sigframe));
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(sigframe)))
-                goto give_sigsegv;
 
         if (frame == (void __user *) -1UL)
                 goto give_sigsegv;
@@ -264,8 +258,6 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
         rt_sigframe __user *frame;
 
         frame = get_sigframe(ka, regs, sizeof(rt_sigframe));
-        if (!access_ok(VERIFY_WRITE, frame, sizeof(rt_sigframe)))
-                goto give_sigsegv;
 
         if (frame == (void __user *) -1UL)
                 goto give_sigsegv;