2 files changed, 5 insertions, 7 deletions

diff --git a/mm/Kconfig b/mm/Kconfig
index ae9ce6b73e8a..21eb51d4da8f 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -125,12 +125,10 @@ comment "Memory hotplug is currently incompatible with Software Suspend"
 # space can be handled with less contention: split it at this NR_CPUS.
 # Default to 4 for wider testing, though 8 might be more appropriate.
 # ARM's adjust_pte (unused if VIPT) depends on mm-wide page_table_lock.
-# PA-RISC's debug spinlock_t is too large for the 32-bit struct page.
-# ARM26 and SPARC32 and PPC64 may use one page for multiple page tables.
+# PA-RISC 7xxx's spinlock_t would enlarge struct page from 32 to 44 bytes.
 #
 config SPLIT_PTLOCK_CPUS
         int
         default "4096" if ARM && !CPU_CACHE_VIPT
-        default "4096" if PARISC && DEBUG_SPINLOCK && !64BIT
-        default "4096" if ARM26 || SPARC32 || PPC64
+        default "4096" if PARISC && !PA20
         default "4"
diff --git a/mm/truncate.c b/mm/truncate.c
index 29c18f68dc35..9173ab500604 100644
--- a/mm/truncate.c
+++ b/mm/truncate.c
@@ -282,8 +282,8 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
                                          * Zap the rest of the file in one hit.
                                          */
                                         unmap_mapping_range(mapping,
-                                            page_index << PAGE_CACHE_SHIFT,
-                                            (end - page_index + 1)
+                                           (loff_t)page_index<<PAGE_CACHE_SHIFT,
+                                           (loff_t)(end - page_index + 1)
                                                         << PAGE_CACHE_SHIFT,
                                             0);
                                         did_range_unmap = 1;
@@ -292,7 +292,7 @@ int invalidate_inode_pages2_range(struct address_space *mapping,
                                          * Just zap this page
                                          */
                                         unmap_mapping_range(mapping,
-                                          page_index << PAGE_CACHE_SHIFT,
+                                          (loff_t)page_index<<PAGE_CACHE_SHIFT,
                                           PAGE_CACHE_SIZE, 0);
                                 }
                         }