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[PATCH] cleanup vmalloc_fault for 64bit kernel

To: Ralf Baechle <ralf@linux-mips.org>
Subject: [PATCH] cleanup vmalloc_fault for 64bit kernel
From: Wu Fei <at.wufei@gmail.com>
Date: Mon, 31 Aug 2009 21:28:12 +0800
Cc: linux-mips@linux-mips.org
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64bit kernel won't arrive vmalloc_fault, it's not necessary or possible
to copy the page table from init_mm.pgd. swapper_pg_dir, module_pg_dir
and the process's pgd represent the different virtual address area, and
the tlb exception handler accesses the suitable one directly.

Signed-off-by: Wu Fei <at.wufei@gmail.com>
---
 arch/mips/mm/fault.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/mips/mm/fault.c b/arch/mips/mm/fault.c
index f956ecb..e769789 100644
--- a/arch/mips/mm/fault.c
+++ b/arch/mips/mm/fault.c
@@ -58,11 +58,9 @@ asmlinkage void do_page_fault(struct pt_regs *regs, unsigned 
long write,
         * only copy the information from the master page table,
         * nothing more.
         */
+#ifdef CONFIG_32BIT
        if (unlikely(address >= VMALLOC_START && address <= VMALLOC_END))
                goto vmalloc_fault;
-#ifdef MODULE_START
-       if (unlikely(address >= MODULE_START && address < MODULE_END))
-               goto vmalloc_fault;
 #endif
 
        /*
@@ -203,6 +201,7 @@ do_sigbus:
        force_sig_info(SIGBUS, &info, tsk);
 
        return;
+#ifdef CONFIG_32BIT
 vmalloc_fault:
        {
                /*
@@ -241,4 +240,5 @@ vmalloc_fault:
                        goto no_context;
                return;
        }
+#endif
 }
-- 
1.6.4.rc1


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