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[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>
This commit is contained in:
Hidetoshi Seto 2008-05-09 15:26:51 +09:00 committed by Tony Luck
parent 3633c73080
commit 2e513fe490
1 changed files with 6 additions and 6 deletions
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12
arch/ia64/kernel/entry.S
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@ -1167,7 +1167,7 @@ skip_rbs_switch:
st8 [r2]=r8 st8 [r2]=r8
st8 [r3]=r10 st8 [r3]=r10
.work_pending: .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 (p6) br.cond.sptk.few .notify
#ifdef CONFIG_PREEMPT #ifdef CONFIG_PREEMPT
(pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1 (pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1
@ -1176,7 +1176,7 @@ skip_rbs_switch:
#endif #endif
ssm psr.i // enable interrupts ssm psr.i // enable interrupts
br.call.spnt.many rp=schedule 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 rsm psr.i // disable interrupts
;; ;;
#ifdef CONFIG_PREEMPT #ifdef CONFIG_PREEMPT
@ -1185,13 +1185,13 @@ skip_rbs_switch:
(pKStk) st4 [r20]=r0 // preempt_count() <- 0 (pKStk) st4 [r20]=r0 // preempt_count() <- 0
#endif #endif
(pLvSys)br.cond.sptk.few .work_pending_syscall_end (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: .notify:
(pUStk) br.call.spnt.many rp=notify_resume_user (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 (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: .work_pending_syscall_end:
adds r2=PT(R8)+16,r12 adds r2=PT(R8)+16,r12
@ -1199,7 +1199,7 @@ skip_rbs_switch:
;; ;;
ld8 r8=[r2] ld8 r8=[r2]
ld8 r10=[r3] ld8 r10=[r3]
br.cond.sptk.many .work_processed_syscall // re-check br.cond.sptk.many .work_processed_syscall
END(ia64_leave_kernel) END(ia64_leave_kernel)