alpha: get rid of switch_stack argument of do_work_pending()

... and now the asm glue side of that.

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

2 files changed, 20 insertions, 23 deletions

diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 0c30ccea9294..16e074f9e581 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -311,7 +311,7 @@ entSys:
 
         .align  4
 ret_from_sys_call:
-        cmovne  $26, 0, $19             /* $19 = 0 => non-restartable */
+        cmovne  $26, 0, $18             /* $18 = 0 => non-restartable */
         ldq     $0, SP_OFF($sp)
         and     $0, 8, $0
         beq     $0, ret_to_kernel
@@ -320,8 +320,8 @@ ret_to_user:
                 sampling and the rti.  */
         lda     $16, 7
         call_pal PAL_swpipl
-        ldl     $5, TI_FLAGS($8)
-        and     $5, _TIF_WORK_MASK, $2
+        ldl     $17, TI_FLAGS($8)
+        and     $17, _TIF_WORK_MASK, $2
         bne     $2, work_pending
 restore_all:
         RESTORE_ALL
@@ -341,10 +341,10 @@ $syscall_error:
          * frame to indicate that a negative return value wasn't an
          * error number..
          */
-        ldq     $19, 0($sp)     /* old syscall nr (zero if success) */
-        beq     $19, $ret_success
+        ldq     $18, 0($sp)     /* old syscall nr (zero if success) */
+        beq     $18, $ret_success
 
-        ldq     $20, 72($sp)    /* .. and this a3 */
+        ldq     $19, 72($sp)    /* .. and this a3 */
         subq    $31, $0, $0     /* with error in v0 */
         addq    $31, 1, $1      /* set a3 for errno return */
         stq     $0, 0($sp)
@@ -362,34 +362,32 @@ $ret_success:
  * Do all cleanup when returning from all interrupts and system calls.
  *
  * Arguments:
- *       $5: TI_FLAGS.
  *       $8: current.
- *      $19: The old syscall number, or zero if this is not a return
+ *      $17: TI_FLAGS.
+ *      $18: The old syscall number, or zero if this is not a return
  *           from a syscall that errored and is possibly restartable.
- *      $20: The old a3 value
+ *      $19: The old a3 value
  */
 
         .align  4
         .ent    work_pending
 work_pending:
-        and     $5, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2
+        and     $17, _TIF_NOTIFY_RESUME | _TIF_SIGPENDING, $2
         bne     $2, $work_notifysig
 
 $work_resched:
         /*
          * We can get here only if we returned from syscall without SIGPENDING
          * or got through work_notifysig already.  Either case means no syscall
-         * restarts for us, so let $19 and $20 burn.
+         * restarts for us, so let $18 and $19 burn.
          */
         jsr     $26, schedule
-        mov     0, $19
+        mov     0, $18
         br      ret_to_user
 
 $work_notifysig:
         mov     $sp, $16
         bsr     $1, do_switch_stack
-        mov     $sp, $17
-        mov     $5, $18
         jsr     $26, do_work_pending
         bsr     $1, undo_switch_stack
         br      restore_all
@@ -440,9 +438,9 @@ $strace_success:
 
         .align  3
 $strace_error:
-        ldq     $19, 0($sp)     /* old syscall nr (zero if success) */
-        beq     $19, $strace_success
-        ldq     $20, 72($sp)    /* .. and this a3 */
+        ldq     $18, 0($sp)     /* old syscall nr (zero if success) */
+        beq     $18, $strace_success
+        ldq     $19, 72($sp)    /* .. and this a3 */
 
         subq    $31, $0, $0     /* with error in v0 */
         addq    $31, 1, $1      /* set a3 for errno return */
@@ -450,11 +448,11 @@ $strace_error:
         stq     $1, 72($sp)     /* a3 for return */
 
         bsr     $1, do_switch_stack
-        mov     $19, $9         /* save old syscall number */
-        mov     $20, $10        /* save old a3 */
+        mov     $18, $9         /* save old syscall number */
+        mov     $19, $10        /* save old a3 */
         jsr     $26, syscall_trace_leave
-        mov     $9, $19
-        mov     $10, $20
+        mov     $9, $18
+        mov     $10, $19
         bsr     $1, undo_switch_stack
 
         mov     $31, $26        /* tell "ret_from_sys_call" we can restart */
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index d0b3507ec6ba..32575f85507d 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -568,8 +568,7 @@ do_signal(struct pt_regs *regs, unsigned long r0, unsigned long r19)
 }
 
 void
-do_work_pending(struct pt_regs *regs, struct switch_stack *unused,
-                 unsigned long thread_flags,
+do_work_pending(struct pt_regs *regs, unsigned long thread_flags,
                  unsigned long r0, unsigned long r19)
 {
         do {