From: Kumar Gala <galak@kernel.crashing.org>
To: linuxppc-dev@ozlabs.org
Subject: [PATCH] powerpc/booke: don't reinitialize time base
Date: Fri, 27 Jun 2008 08:10:08 -0500 (CDT) [thread overview]
Message-ID: <Pine.LNX.4.64.0806270809440.16057@blarg.am.freescale.net> (raw)
For some reason long ago I decided that we should zero out the time base
when we calibrate the decrementer. The problem is that this can be
harmful in SMP systems where the firmware has already synchronized the
time bases on the various cores.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
arch/powerpc/kernel/time.c | 4 ----
1 files changed, 0 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index c73fc33..eb93880 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -742,10 +742,6 @@ void __init generic_calibrate_decr(void)
}
#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
- /* Set the time base to zero */
- mtspr(SPRN_TBWL, 0);
- mtspr(SPRN_TBWU, 0);
-
/* Clear any pending timer interrupts */
mtspr(SPRN_TSR, TSR_ENW | TSR_WIS | TSR_DIS | TSR_FIS);
--
1.5.5.1
reply other threads:[~2008-06-27 14:55 UTC|newest]
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