target/linux/brcm63xx/patches-3.14/101-MIPS-BCM63XX-sync-mips-counter-during-cpu-bringup.patch

   1 From 23c21090f49a64b532755542a71e9aa3e4fc84d9 Mon Sep 17 00:00:00 2001
   2 From: Jonas Gorski <jogo@openwrt.org>
   3 Date: Sat, 5 Apr 2014 20:07:25 +0200
   4 Subject: [PATCH] MIPS: BCM63XX: sync mips counter during cpu bringup
   5
   6 We are using the mips counters as the clock source, so we need to ensure
   7 they are synced, else e.g. gettimeofday will return different values
   8 depending on which core it was run.
   9
  10 Observed difference was about 8 seconds, causing ~8 seconds ping or time
  11 running backwards for some programs.
  12
  13 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
  14 ---
  15  arch/mips/Kconfig | 1 +
  16  1 file changed, 1 insertion(+)
  17
  18 --- a/arch/mips/Kconfig
  19 +++ b/arch/mips/Kconfig
  20 @@ -132,6 +132,7 @@ config BCM63XX
  21         select BOOT_RAW
  22         select CEVT_R4K
  23         select CSRC_R4K
  24 +       select SYNC_R4K
  25         select DMA_NONCOHERENT
  26         select IRQ_CPU
  27         select SYS_SUPPORTS_32BIT_KERNEL