tree debb5e8b570310f150cfd5e6504c814b584d159f parent 295bd89279aad6959f0d363ee8e946d4766f9ad8 author Chen, Kenneth W <[EMAIL PROTECTED]> Wed, 07 Sep 2005 15:00:37 -0700 committer Tony Luck <[EMAIL PROTECTED]> Thu, 08 Sep 2005 03:56:23 -0700
[IA64] minor performance tune-up in ia64_switch_to The reenabling of psr.ic should really belong to dtr mapping code block. It make the fall through code fast since it doesn't need to execute the predicated-off instruction. Logically make more sense as well since psr.ic was turned off in .map code block. Signed-off-by: Ken Chen <[EMAIL PROTECTED]> Signed-off-by: Tony Luck <[EMAIL PROTECTED]> arch/ia64/kernel/entry.S | 6 +++--- 1 files changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/ia64/kernel/entry.S b/arch/ia64/kernel/entry.S --- a/arch/ia64/kernel/entry.S +++ b/arch/ia64/kernel/entry.S @@ -204,9 +204,6 @@ GLOBAL_ENTRY(ia64_switch_to) (p6) br.cond.dpnt .map ;; .done: -(p6) ssm psr.ic // if we had to map, reenable the psr.ic bit FIRST!!! - ;; -(p6) srlz.d ld8 sp=[r21] // load kernel stack pointer of new task mov IA64_KR(CURRENT)=in0 // update "current" application register mov r8=r13 // return pointer to previously running task @@ -234,6 +231,9 @@ GLOBAL_ENTRY(ia64_switch_to) mov IA64_KR(CURRENT_STACK)=r26 // remember last page we mapped... ;; itr.d dtr[r25]=r23 // wire in new mapping... + ssm psr.ic // reenable the psr.ic bit + ;; + srlz.d br.cond.sptk .done END(ia64_switch_to) - To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html