Re: [PATCH 13/27] m68k: Use common bits from generic tlb.h

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Am 14.05.2014 21:19, schrieb Geert Uytterhoeven:
On Wed, May 14, 2014 at 8:59 PM, Richard Weinberger <richard@xxxxxx> wrote:
--- a/arch/m68k/include/asm/tlb.h
+++ b/arch/m68k/include/asm/tlb.h
@@ -1,19 +1,11 @@
 #ifndef _M68K_TLB_H
 #define _M68K_TLB_H

-/*
- * m68k doesn't need any special per-pte or
- * per-vma handling..
- */
-#define tlb_start_vma(tlb, vma)        do { } while (0)
-#define tlb_end_vma(tlb, vma)  do { } while (0)
-#define __tlb_remove_tlb_entry(tlb, ptep, address)     do { } while (0)
-
-/*
- * .. because we flush the whole mm when it
- * fills up.
- */
-#define tlb_flush(tlb)         flush_tlb_mm((tlb)->mm)
+#ifdef CONFIG_MMU && !defined(CONFIG_COLDFIRE) && !defined(CONFIG_SUN3)

Syntax error:

#if defined(CONFIG_MMU) && ...

Whoops, thanks for pointing this out.

But why this sudden #ifdef checks?

They are needed because in pgalloc.h you have:
#ifdef CONFIG_MMU
#include <asm/virtconvert.h>
#if defined(CONFIG_COLDFIRE)
#include <asm/mcf_pgalloc.h>
#elif defined(CONFIG_SUN3)
#include <asm/sun3_pgalloc.h>
#else
#include <asm/motorola_pgalloc.h>
#endif

And only asm/motorola_pgalloc.h have __pte/pmd_free_tlb as static inline functions.
Therefore we need to define them such that the generic tlb.h versions will not clash
with yours.

Thanks,
//richard
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