[IA64] Add TIF_RESTORE_SIGMASK

Preparation for pselect and ppoll.
ia32 compat code not tested. :-(

Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

2 files changed, 11 insertions, 87 deletions

diff --git a/arch/ia64/ia32/ia32_entry.S b/arch/ia64/ia32/ia32_entry.S
index 687e5fdc9683..99b665e2b1d5 100644
--- a/arch/ia64/ia32/ia32_entry.S
+++ b/arch/ia64/ia32/ia32_entry.S
@@ -52,43 +52,6 @@ ENTRY(ia32_clone)
         br.ret.sptk.many rp
 END(ia32_clone)
 
-ENTRY(sys32_rt_sigsuspend)
-        .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
-        alloc loc1=ar.pfs,8,2,3,0               // preserve all eight input regs
-        mov loc0=rp
-        mov out0=in0                            // mask
-        mov out1=in1                            // sigsetsize
-        mov out2=sp                             // out2 = &sigscratch
-        .fframe 16
-        adds sp=-16,sp                          // allocate dummy "sigscratch"
-        ;;
-        .body
-        br.call.sptk.many rp=ia32_rt_sigsuspend
-1:      .restore sp
-        adds sp=16,sp
-        mov rp=loc0
-        mov ar.pfs=loc1
-        br.ret.sptk.many rp
-END(sys32_rt_sigsuspend)
-
-ENTRY(sys32_sigsuspend)
-        .prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)
-        alloc loc1=ar.pfs,8,2,3,0               // preserve all eight input regs
-        mov loc0=rp
-        mov out0=in2                            // mask (first two args are ignored)
-        ;;
-        mov out1=sp                             // out1 = &sigscratch
-        .fframe 16
-        adds sp=-16,sp                          // allocate dummy "sigscratch"
-        .body
-        br.call.sptk.many rp=ia32_sigsuspend
-1:      .restore sp
-        adds sp=16,sp
-        mov rp=loc0
-        mov ar.pfs=loc1
-        br.ret.sptk.many rp
-END(sys32_sigsuspend)
-
 GLOBAL_ENTRY(ia32_ret_from_clone)
         PT_REGS_UNWIND_INFO(0)
 {       /*
@@ -389,7 +352,7 @@ ia32_syscall_table:
         data8 sys_rt_sigpending
         data8 compat_sys_rt_sigtimedwait
         data8 sys32_rt_sigqueueinfo
-        data8 sys32_rt_sigsuspend
+        data8 compat_sys_rt_sigsuspend
         data8 sys32_pread         /* 180 */
         data8 sys32_pwrite
         data8 sys_chown /* 16-bit version */
diff --git a/arch/ia64/ia32/ia32_signal.c b/arch/ia64/ia32/ia32_signal.c
index 7b38b73e7827..b2bb7f227920 100644
--- a/arch/ia64/ia32/ia32_signal.c
+++ b/arch/ia64/ia32/ia32_signal.c
@@ -452,59 +452,20 @@ sigact_set_handler (struct k_sigaction *sa, unsigned int handler, unsigned int r
                 sa->sa.sa_handler = (__sighandler_t) (((unsigned long) restorer << 32) | handler);
 }
 
-long
-__ia32_rt_sigsuspend (compat_sigset_t *sset, unsigned int sigsetsize, struct sigscratch *scr)
+asmlinkage long
+sys32_sigsuspend (int history0, int history1, old_sigset_t mask)
 {
-        extern long ia64_do_signal (sigset_t *oldset, struct sigscratch *scr, long in_syscall);
-        sigset_t oldset, set;
-
-        scr->scratch_unat = 0;  /* avoid leaking kernel bits to user level */
-        memset(&set, 0, sizeof(set));
-
-        memcpy(&set.sig, &sset->sig, sigsetsize);
-
-        sigdelsetmask(&set, ~_BLOCKABLE);
-
+        mask &= _BLOCKABLE;
         spin_lock_irq(&current->sighand->siglock);
-        {
-                oldset = current->blocked;
-                current->blocked = set;
-                recalc_sigpending();
-        }
+        current->saved_sigmask = current->blocked;
+        siginitset(&current->blocked, mask);
+        recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        /*
-         * The return below usually returns to the signal handler.  We need to pre-set the
-         * correct error code here to ensure that the right values get saved in sigcontext
-         * by ia64_do_signal.
-         */
-        scr->pt.r8 = -EINTR;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (ia64_do_signal(&oldset, scr, 1))
-                        return -EINTR;
-        }
-}
-
-asmlinkage long
-ia32_rt_sigsuspend (compat_sigset_t __user *uset, unsigned int sigsetsize, struct sigscratch *scr)
-{
-        compat_sigset_t set;
-
-        if (sigsetsize > sizeof(compat_sigset_t))
-                return -EINVAL;
-
-        if (copy_from_user(&set.sig, &uset->sig, sigsetsize))
-                return -EFAULT;
-
-        return __ia32_rt_sigsuspend(&set, sigsetsize, scr);
-}
-
-asmlinkage long
-ia32_sigsuspend (unsigned int mask, struct sigscratch *scr)
-{
-        return __ia32_rt_sigsuspend((compat_sigset_t *) &mask, sizeof(mask), scr);
+        current->state = TASK_INTERRUPTIBLE;
+        schedule();
+        set_thread_flag(TIF_RESTORE_SIGMASK);
+        return -ERESTARTNOHAND;
 }
 
 asmlinkage long