2 files changed, 18 insertions, 13 deletions

diff --git a/include/asm-ppc/pgtable.h b/include/asm-ppc/pgtable.h
index c41c7958ea1f..92f30b28b252 100644
--- a/include/asm-ppc/pgtable.h
+++ b/include/asm-ppc/pgtable.h
@@ -227,21 +227,21 @@ extern unsigned long ioremap_bot, ioremap_base;
  *     doesn't support SMP. So we can use this as software bit, like
  *     DIRTY.
  *
- * PPC Book-E Linux implementation uses PPC HW PTE bit field definition,
- * even it doesn't have HW PTE. 0-11th LSB of PTE stand for memory
- * protection-related function. (See PTE structure in include/asm-ppc/mmu.h)
- * Definition of _PAGE_XXX in "include/asm-ppc/pagetable.h" stands for
- * above bits. Note that those bits values are CPU dependent, not
- * architecture.
+ * With the PPC 44x Linux implementation, the 0-11th LSBs of the PTE are used
+ * for memory protection related functions (see PTE structure in
+ * include/asm-ppc/mmu.h).  The _PAGE_XXX definitions in this file map to the
+ * above bits.  Note that the bit values are CPU specific, not architecture
+ * specific.
  *
- * Kernel PTE entry holds arch-dependent swp_entry structure under certain
- * situation. In other words, in such situation, some portion of PTE bits
- * are used as swp_entry. In PPC implementation, 3-24th LSB are shared with
- * swp_entry, however 0-2nd three LSB still hold protection values.
- * That means three protection bits are reserved for both PTE and SWAP
- * entry at the most three LSBs.
+ * The kernel PTE entry holds an arch-dependent swp_entry structure under
+ * certain situations. In other words, in such situations some portion of
+ * the PTE bits are used as a swp_entry. In the PPC implementation, the
+ * 3-24th LSB are shared with swp_entry, however the 0-2nd three LSB still
+ * hold protection values. That means the three protection bits are
+ * reserved for both PTE and SWAP entry at the most significant three
+ * LSBs.
  *
- * There are three protection bits available for SWAP entry;
+ * There are three protection bits available for SWAP entry:
  *      _PAGE_PRESENT
  *      _PAGE_FILE
  *      _PAGE_HASHPTE (if HW has)
diff --git a/include/linux/zlib.h b/include/linux/zlib.h
index 850076ea14d3..74f7b78c22d2 100644
--- a/include/linux/zlib.h
+++ b/include/linux/zlib.h
@@ -506,6 +506,11 @@ extern int zlib_deflateReset (z_streamp strm);
    stream state was inconsistent (such as zalloc or state being NULL).
 */
 
+static inline unsigned long deflateBound(unsigned long s)
+{
+        return s + ((s + 7) >> 3) + ((s + 63) >> 6) + 11;
+}
+
 extern int zlib_deflateParams (z_streamp strm, int level, int strategy);
 /*
      Dynamically update the compression level and compression strategy.  The