mips: switch to generic compat rt_sigaction()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

4 files changed, 5 insertions, 54 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index b1e885f31703..7352acfe70b7 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -42,6 +42,7 @@ config MIPS
         select MODULES_USE_ELF_REL if MODULES
         select MODULES_USE_ELF_RELA if MODULES && 64BIT
         select GENERIC_SIGALTSTACK
+        select GENERIC_COMPAT_RT_SIGACTION
         select GENERIC_COMPAT_RT_SIGQUEUEINFO
         select GENERIC_COMPAT_RT_SIGPROCMASK
         select GENERIC_COMPAT_RT_SIGPENDING
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 5dfeba49ab4f..572ab50ff098 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -117,7 +117,7 @@ EXPORT(sysn32_call_table)
         PTR     sys_mprotect                    /* 6010 */
         PTR     sys_munmap
         PTR     sys_brk
-        PTR     sys_32_rt_sigaction
+        PTR     compat_sys_rt_sigaction
         PTR     compat_sys_rt_sigprocmask
         PTR     compat_sys_ioctl                /* 6015 */
         PTR     sys_pread64
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 6623077a9488..aa29c3318fbc 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -386,7 +386,7 @@ sys_call_table:
         PTR     sys_getresgid
         PTR     sys_prctl
         PTR     sys32_rt_sigreturn
-        PTR     sys_32_rt_sigaction
+        PTR     compat_sys_rt_sigaction
         PTR     compat_sys_rt_sigprocmask       /* 4195 */
         PTR     compat_sys_rt_sigpending
         PTR     compat_sys_rt_sigtimedwait
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 0b1f57111eae..ad7c2be0c33d 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -55,12 +55,6 @@ extern asmlinkage int fpu_emulator_restore_context32(struct sigcontext32 __user
 typedef unsigned int __sighandler32_t;
 typedef void (*vfptr_t)(void);
 
-struct sigaction32 {
-        unsigned int            sa_flags;
-        __sighandler32_t        sa_handler;
-        compat_sigset_t         sa_mask;
-};
-
 struct ucontext32 {
         u32                 uc_flags;
         s32                 uc_link;
@@ -278,8 +272,8 @@ asmlinkage int sys32_sigsuspend(compat_sigset_t __user *uset)
         return compat_sys_rt_sigsuspend(uset, sizeof(compat_sigset_t));
 }
 
-SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
-        struct sigaction32 __user *, oact)
+SYSCALL_DEFINE3(32_sigaction, long, sig, const struct compat_sigaction __user *, act,
+        struct compat_sigaction __user *, oact)
 {
         struct k_sigaction new_ka, old_ka;
         int ret;
@@ -564,50 +558,6 @@ struct mips_abi mips_abi_32 = {
         .restart        = __NR_O32_restart_syscall
 };
 
-SYSCALL_DEFINE4(32_rt_sigaction, int, sig,
-        const struct sigaction32 __user *, act,
-        struct sigaction32 __user *, oact, unsigned int, sigsetsize)
-{
-        struct k_sigaction new_sa, old_sa;
-        int ret = -EINVAL;
-
-        /* XXX: Don't preclude handling different sized sigset_t's.  */
-        if (sigsetsize != sizeof(sigset_t))
-                goto out;
-
-        if (act) {
-                s32 handler;
-                int err = 0;
-
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)))
-                        return -EFAULT;
-                err |= __get_user(handler, &act->sa_handler);
-                new_sa.sa.sa_handler = (void __user *)(s64)handler;
-                err |= __get_user(new_sa.sa.sa_flags, &act->sa_flags);
-                err |= get_sigset(&new_sa.sa.sa_mask, &act->sa_mask);
-                if (err)
-                        return -EFAULT;
-        }
-
-        ret = do_sigaction(sig, act ? &new_sa : NULL, oact ? &old_sa : NULL);
-
-        if (!ret && oact) {
-                int err = 0;
-
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)))
-                        return -EFAULT;
-
-                err |= __put_user((u32)(u64)old_sa.sa.sa_handler,
-                                   &oact->sa_handler);
-                err |= __put_user(old_sa.sa.sa_flags, &oact->sa_flags);
-                err |= put_sigset(&old_sa.sa.sa_mask, &oact->sa_mask);
-                if (err)
-                        return -EFAULT;
-        }
-out:
-        return ret;
-}
-
 static int signal32_init(void)
 {
         if (cpu_has_fpu) {