arm64: switch to generic old sigaction() (compat-only)

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

2 files changed, 1 insertions, 45 deletions

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 24dce472a77e..1f27c58f44ad 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -210,6 +210,7 @@ config COMPAT
         select COMPAT_BINFMT_ELF
         select HAVE_UID16
         select OLD_SIGSUSPEND3
+        select COMPAT_OLD_SIGACTION
         help
           This option enables support for a 32-bit EL0 running under a 64-bit
           kernel at EL1. AArch32-specific components such as system calls,
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c
index 892b9dfb5517..92ada01f4cd8 100644
--- a/arch/arm64/kernel/signal32.c
+++ b/arch/arm64/kernel/signal32.c
@@ -28,13 +28,6 @@
 #include <asm/uaccess.h>
 #include <asm/unistd32.h>
 
-struct compat_old_sigaction {
-        compat_uptr_t                   sa_handler;
-        compat_old_sigset_t             sa_mask;
-        compat_ulong_t                  sa_flags;
-        compat_uptr_t                   sa_restorer;
-};
-
 struct compat_sigcontext {
         /* We always set these two fields to 0 */
         compat_ulong_t                  trap_no;
@@ -326,44 +319,6 @@ static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
         return err ? -EFAULT : 0;
 }
 
-asmlinkage int compat_sys_sigaction(int sig,
-                                    const struct compat_old_sigaction __user *act,
-                                    struct compat_old_sigaction __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
-        compat_old_sigset_t mask;
-        compat_uptr_t handler, restorer;
-
-        if (act) {
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(handler, &act->sa_handler) ||
-                    __get_user(restorer, &act->sa_restorer) ||
-                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-
-                new_ka.sa.sa_handler = compat_ptr(handler);
-                new_ka.sa.sa_restorer = compat_ptr(restorer);
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                    __put_user(ptr_to_compat(old_ka.sa.sa_handler),
-                               &oact->sa_handler) ||
-                    __put_user(ptr_to_compat(old_ka.sa.sa_restorer),
-                               &oact->sa_restorer) ||
-                    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
-                    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
-                        return -EFAULT;
-        }
-
-        return ret;
-}
-
 static int compat_restore_sigframe(struct pt_regs *regs,
                                    struct compat_sigframe __user *sf)
 {