s390: switch to generic old sigaction()

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

7 files changed, 3 insertions, 89 deletions

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e3ab2d6fdca6..bcdcf31fa672 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -146,6 +146,7 @@ config S390
         select GENERIC_COMPAT_RT_SIGPROCMASK
         select GENERIC_COMPAT_RT_SIGPENDING
         select OLD_SIGSUSPEND3
+        select OLD_SIGACTION
 
 config SCHED_OMIT_FRAME_POINTER
         def_bool y
@@ -255,6 +256,7 @@ config COMPAT
         depends on 64BIT
         select COMPAT_BINFMT_ELF if BINFMT_ELF
         select ARCH_WANT_OLD_COMPAT_IPC
+        select COMPAT_OLD_SIGACTION
         help
           Select this option if you want to enable your system kernel to
           handle system-calls from ELF binaries for 31 bit ESA.  This option
diff --git a/arch/s390/include/asm/signal.h b/arch/s390/include/asm/signal.h
index d26e30e31656..abf9e5735943 100644
--- a/arch/s390/include/asm/signal.h
+++ b/arch/s390/include/asm/signal.h
@@ -21,12 +21,5 @@ typedef struct {
         unsigned long sig[_NSIG_WORDS];
 } sigset_t;
 
-struct old_sigaction {
-        __sighandler_t sa_handler;
-        old_sigset_t sa_mask;
-        unsigned long sa_flags;
-        void (*sa_restorer)(void);
-};
-
 #define __ARCH_HAS_SA_RESTORER
 #endif
diff --git a/arch/s390/kernel/compat_linux.h b/arch/s390/kernel/compat_linux.h
index 47e9f07e3675..00d92a5a6f6c 100644
--- a/arch/s390/kernel/compat_linux.h
+++ b/arch/s390/kernel/compat_linux.h
@@ -17,13 +17,6 @@ struct ipc_kludge_32 {
         __s32   msgtyp;
 };
 
-struct old_sigaction32 {
-       __u32                    sa_handler;     /* Really a pointer, but need to deal with 32 bits */
-       compat_old_sigset_t      sa_mask;        /* A 32 bit mask */
-       __u32                    sa_flags;
-       __u32                    sa_restorer;    /* Another 32 bit pointer */
-};
-
 /* asm/sigcontext.h */
 typedef union
 {
@@ -81,8 +74,6 @@ struct ucontext32 {
 struct stat64_emu31;
 struct mmap_arg_struct_emu31;
 struct fadvise64_64_args;
-struct old_sigaction32;
-struct old_sigaction32;
 
 long sys32_chown16(const char __user * filename, u16 user, u16 group);
 long sys32_lchown16(const char __user * filename, u16 user, u16 group);
@@ -131,6 +122,4 @@ long sys32_read(unsigned int fd, char __user * buf, size_t count);
 long sys32_write(unsigned int fd, const char __user * buf, size_t count);
 long sys32_fadvise64(int fd, loff_t offset, size_t len, int advise);
 long sys32_fadvise64_64(struct fadvise64_64_args __user *args);
-long sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
-                     struct old_sigaction32 __user *oact);
 #endif /* _ASM_S390X_S390_H */
diff --git a/arch/s390/kernel/compat_signal.c b/arch/s390/kernel/compat_signal.c
index 141bfe190d52..3e71194c1902 100644
--- a/arch/s390/kernel/compat_signal.c
+++ b/arch/s390/kernel/compat_signal.c
@@ -157,43 +157,6 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
         return err;
 }
 
-asmlinkage long
-sys32_sigaction(int sig, const struct old_sigaction32 __user *act,
-                 struct old_sigaction32 __user *oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        unsigned long sa_handler, sa_restorer;
-        int ret;
-
-        if (act) {
-                compat_old_sigset_t mask;
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(sa_handler, &act->sa_handler) ||
-                    __get_user(sa_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 = (__sighandler_t) sa_handler;
-                new_ka.sa.sa_restorer = (void (*)(void)) sa_restorer;
-                siginitset(&new_ka.sa.sa_mask, mask);
-        }
-
-        ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
-
-        if (!ret && oact) {
-                sa_handler = (unsigned long) old_ka.sa.sa_handler;
-                sa_restorer = (unsigned long) old_ka.sa.sa_restorer;
-                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
-                    __put_user(sa_handler, &oact->sa_handler) ||
-                    __put_user(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 save_sigregs32(struct pt_regs *regs, _sigregs32 __user *sregs)
 {
         _s390_regs_common32 regs32;
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 1f8af0017c65..559e04fe4071 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -230,7 +230,7 @@ ENTRY(sys32_sigaction_wrapper)
         lgfr    %r2,%r2                 # int
         llgtr   %r3,%r3                 # const struct old_sigaction *
         llgtr   %r4,%r4                 # struct old_sigaction32 *
-        jg      sys32_sigaction         # branch to system call
+        jg      compat_sys_sigaction            # branch to system call
 
 ENTRY(sys32_setreuid16_wrapper)
         llgfr   %r2,%r2                 # __kernel_old_uid_emu31_t
diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index ee1a8b3d0db4..c3a736a3ed44 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -73,8 +73,6 @@ long sys_s390_fadvise64(int fd, u32 offset_high, u32 offset_low,
 long sys_s390_fadvise64_64(struct fadvise64_64_args __user *args);
 long sys_s390_fallocate(int fd, int mode, loff_t offset, u32 len_high,
                         u32 len_low);
-long sys_sigaction(int sig, const struct old_sigaction __user *act,
-                   struct old_sigaction __user *oact);
 long sys_sigreturn(void);
 long sys_rt_sigreturn(void);
 long sys32_sigreturn(void);
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 0bc5c9d1ab99..9c6e747a5e1e 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -48,37 +48,6 @@ typedef struct
         struct ucontext uc;
 } rt_sigframe;
 
-SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
-                struct old_sigaction __user *, oact)
-{
-        struct k_sigaction new_ka, old_ka;
-        int ret;
-
-        if (act) {
-                old_sigset_t mask;
-                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
-                    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
-                    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
-                    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
-                    __get_user(mask, &act->sa_mask))
-                        return -EFAULT;
-                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(old_ka.sa.sa_handler, &oact->sa_handler) ||
-                    __put_user(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;
-}
-
 /* Returns non-zero on fault. */
 static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
 {