[SPARC]: Add support for *at(), ppoll, and pselect syscalls.

This also includes by necessity _TIF_RESTORE_SIGMASK support,
which actually resulted in a lot of cleanups.

The sparc signal handling code is quite a mess and I should
clean it up some day.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 18 deletions

diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S
index 090dcca00d2a..b80eba0081ca 100644
--- a/arch/sparc64/kernel/rtrap.S
+++ b/arch/sparc64/kernel/rtrap.S
@@ -53,14 +53,13 @@ __handle_user_windows:
                 wrpr                    %g0, RTRAP_PSTATE_IRQOFF, %pstate
                 ldx                     [%g6 + TI_FLAGS], %l0
 
-1:              andcc                   %l0, (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING), %g0
+1:              andcc                   %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
                 be,pt                   %xcc, __handle_user_windows_continue
                  nop
-                clr                     %o0
-                mov                     %l5, %o2
-                mov                     %l6, %o3
-                add                     %sp, PTREGS_OFF, %o1
-                mov                     %l0, %o4
+                mov                     %l5, %o1
+                mov                     %l6, %o2
+                add                     %sp, PTREGS_OFF, %o0
+                mov                     %l0, %o3
 
                 call                    do_notify_resume
                  wrpr                   %g0, RTRAP_PSTATE, %pstate
@@ -96,15 +95,14 @@ __handle_perfctrs:
                  wrpr                   %g0, RTRAP_PSTATE, %pstate
                 wrpr                    %g0, RTRAP_PSTATE_IRQOFF, %pstate
                 ldx                     [%g6 + TI_FLAGS], %l0
-1:              andcc                   %l0, (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING), %g0
+1:              andcc                   %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
 
                 be,pt                   %xcc, __handle_perfctrs_continue
                  sethi                  %hi(TSTATE_PEF), %o0
-                clr                     %o0
-                mov                     %l5, %o2
-                mov                     %l6, %o3
-                add                     %sp, PTREGS_OFF, %o1
-                mov                     %l0, %o4
+                mov                     %l5, %o1
+                mov                     %l6, %o2
+                add                     %sp, PTREGS_OFF, %o0
+                mov                     %l0, %o3
                 call                    do_notify_resume
 
                  wrpr                   %g0, RTRAP_PSTATE, %pstate
@@ -129,11 +127,10 @@ __handle_userfpu:
                 ba,a,pt                 %xcc, __handle_userfpu_continue
 
 __handle_signal:
-                clr                     %o0
-                mov                     %l5, %o2
-                mov                     %l6, %o3
-                add                     %sp, PTREGS_OFF, %o1
-                mov                     %l0, %o4
+                mov                     %l5, %o1
+                mov                     %l6, %o2
+                add                     %sp, PTREGS_OFF, %o0
+                mov                     %l0, %o3
                 call                    do_notify_resume
                  wrpr                   %g0, RTRAP_PSTATE, %pstate
                 wrpr                    %g0, RTRAP_PSTATE_IRQOFF, %pstate
@@ -200,7 +197,7 @@ __handle_preemption_continue:
                  andcc                  %l1, %o0, %g0
                 andcc                   %l0, _TIF_NEED_RESCHED, %g0
                 bne,pn                  %xcc, __handle_preemption
-                 andcc                  %l0, (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING), %g0
+                 andcc                  %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
                 bne,pn                  %xcc, __handle_signal
 __handle_signal_continue:
                  ldub                   [%g6 + TI_WSAVED], %o2