[PATCH] ppc64: pgtable.h and other header cleanups

This patch started as simply removing a few never-used macros from
asm-ppc64/pgtable.h, then kind of grew.  It now makes a bunch of
cleanups to the ppc64 low-level header files (with corresponding
changes to .c files where necessary) such as:
	- Abolishing never-used macros
	- Eliminating multiple #defines with the same purpose
	- Removing pointless macros (cases where just expanding the
macro everywhere turns out clearer and more sensible)
	- Removing some cases where macros which could be defined in
terms of each other weren't
	- Moving imalloc() related definitions from pgtable.h to their
own header file (imalloc.h)
	- Re-arranging headers to group things more logically
	- Moving all VSID allocation related things to mmu.h, instead
of being split between mmu.h and mmu_context.h
	- Removing some reserved space for flags from the PMD - we're
not using it.
	- Fix some bugs which broke compile with STRICT_MM_TYPECHECKS.

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 6 deletions

diff --git a/arch/ppc64/mm/hash_utils.c b/arch/ppc64/mm/hash_utils.c
index e48be12f518c..0a0f97008d02 100644
--- a/arch/ppc64/mm/hash_utils.c
+++ b/arch/ppc64/mm/hash_utils.c
@@ -298,24 +298,23 @@ int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
         int local = 0;
         cpumask_t tmp;
 
+        if ((ea & ~REGION_MASK) > EADDR_MASK)
+                return 1;
+
         switch (REGION_ID(ea)) {
         case USER_REGION_ID:
                 user_region = 1;
                 mm = current->mm;
-                if ((ea > USER_END) || (! mm))
+                if (! mm)
                         return 1;
 
                 vsid = get_vsid(mm->context.id, ea);
                 break;
         case IO_REGION_ID:
-                if (ea > IMALLOC_END)
-                        return 1;
                 mm = &ioremap_mm;
                 vsid = get_kernel_vsid(ea);
                 break;
         case VMALLOC_REGION_ID:
-                if (ea > VMALLOC_END)
-                        return 1;
                 mm = &init_mm;
                 vsid = get_kernel_vsid(ea);
                 break;
@@ -362,7 +361,7 @@ void flush_hash_page(unsigned long context, unsigned long ea, pte_t pte,
         unsigned long vsid, vpn, va, hash, secondary, slot;
         unsigned long huge = pte_huge(pte);
 
-        if ((ea >= USER_START) && (ea <= USER_END))
+        if (ea < KERNELBASE)
                 vsid = get_vsid(context, ea);
         else
                 vsid = get_kernel_vsid(ea);