[BUG] asm-ppc/pgtable.h breakage from 2.6.7-rc1-bk4

[Mikael Pettersson]

The current 2.6.7-rc2 kernel hangs after starting INIT
on my PowerMac 4400. I traced the problem to the
ptep_set_access_flags() patch in 2.6.7-rc1-bk4, which
replaces ptep_establish()'s set_pte();flush_tlb_page()
sequence with a single pte_update() in two places in
mm/memory.c.

The patch below disables this change on ppc32, and
allows my 603ev-based PM4400 to finally boot 2.6.7-rc2.

/Mikael

diff -ruN linux-2.6.7-rc2/include/asm-ppc/pgtable.h linux-2.6.7-rc2.ppc-pgtable-fix/include/asm-ppc/pgtable.h
--- linux-2.6.7-rc2/include/asm-ppc/pgtable.h	2004-06-05 19:56:55.000000000 +0200
+++ linux-2.6.7-rc2.ppc-pgtable-fix/include/asm-ppc/pgtable.h	2004-06-05 19:58:43.000000000 +0200
@@ -548,6 +548,7 @@
 	pte_update(ptep, 0, _PAGE_DIRTY);
 }
 
+#if 0
 #define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
 static inline void __ptep_set_access_flags(pte_t *ptep, pte_t entry, int dirty)
 {
@@ -557,6 +558,7 @@
 }
 #define  ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
         __ptep_set_access_flags(__ptep, __entry, __dirty)
+#endif
 
 /*
  * Macro to mark a page protection value as "uncacheable".
-
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