[IA64] trivial cleanup for entry.S

This patch does:
 - make comment at next to resched check more robust
 - move "re-check" comments to next to where change predicate regs

Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S
index ef6b031..ca2bb95 100644 (file)
--- a/arch/ia64/kernel/entry.S
+++ b/arch/ia64/kernel/entry.S
@@ -1167,7 +1167,7 @@ skip_rbs_switch:
        st8 [r2]=r8
        st8 [r3]=r10
 .work_pending:
-       tbit.z p6,p0=r31,TIF_NEED_RESCHED               // current_thread_info()->need_resched==0?
+       tbit.z p6,p0=r31,TIF_NEED_RESCHED       // is resched not needed?
 (p6)   br.cond.sptk.few .notify
 #ifdef CONFIG_PREEMPT
 (pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1
@@ -1176,7 +1176,7 @@ skip_rbs_switch:
 #endif
        ssm psr.i               // enable interrupts
        br.call.spnt.many rp=schedule
-.ret9: cmp.eq p6,p0=r0,r0                              // p6 <- 1
+.ret9: cmp.eq p6,p0=r0,r0      // p6 <- 1 (re-check)
        rsm psr.i               // disable interrupts
        ;;
 #ifdef CONFIG_PREEMPT
@@ -1185,13 +1185,13 @@ skip_rbs_switch:
 (pKStk)        st4 [r20]=r0            // preempt_count() <- 0
 #endif
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-       br.cond.sptk.many .work_processed_kernel        // re-check
+       br.cond.sptk.many .work_processed_kernel
 
 .notify:
 (pUStk)        br.call.spnt.many rp=notify_resume_user
-.ret10:        cmp.ne p6,p0=r0,r0                              // p6 <- 0
+.ret10:        cmp.ne p6,p0=r0,r0      // p6 <- 0 (don't re-check)
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-       br.cond.sptk.many .work_processed_kernel        // don't re-check
+       br.cond.sptk.many .work_processed_kernel
 
 .work_pending_syscall_end:
        adds r2=PT(R8)+16,r12
@@ -1199,7 +1199,7 @@ skip_rbs_switch:
        ;;
        ld8 r8=[r2]
        ld8 r10=[r3]
-       br.cond.sptk.many .work_processed_syscall       // re-check
+       br.cond.sptk.many .work_processed_syscall
 
 END(ia64_leave_kernel)