From: Jonas Gorski <jogo@openwrt.org>
Date: Fri, 21 Jun 2013 17:48:48 +0000 (+0000)
Subject: MIPS: Flush TLB handlers directly after writing them
X-Git-Tag: v3.11-rc1~14^2^2~1
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3d9086bb121a6459c9ed0452e3c58891a504785;p=pandora-kernel.git

MIPS: Flush TLB handlers directly after writing them

When having enabled MIPS_PGD_C0_CONTEXT, trap_init() might call the
generated tlbmiss_handler_setup_pgd before it was committed to memory,
causing boot failures:

  trap_init()
   |- per_cpu_trap_init()
   |   |- TLBMISS_HANDLER_SETUP()
   |       |- tlbmiss_handler_setup_pgd()
   |- flush_tlb_handlers()

To avoid this, move flush_tlb_handlers() into build_tlb_refill_handler()
right after they were generated. We can do this as the cache handling is
initialized just before creating the tlb handlers.

This issue was introduced in 3d8bfdd0307223de678962f1c1907a7cec549136
("MIPS: Use C0_KScratch (if present) to hold PGD pointer.").

Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: Steven J. Hill <Steven.Hill@imgtec.com>
Cc: Jayachandran C <jchandra@broadcom.com>
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/5539/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

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