4 files changed, 21 insertions, 8 deletions

diff --git a/mm/bootmem.c b/mm/bootmem.c
index f82f7aebbee3..c1330cc19783 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -33,6 +33,14 @@ EXPORT_SYMBOL(max_pfn);		/* This is exported so
                                  * dma_get_required_mask(), which uses
                                  * it, can be an inline function */
 
+#ifdef CONFIG_CRASH_DUMP
+/*
+ * If we have booted due to a crash, max_pfn will be a very low value. We need
+ * to know the amount of memory that the previous kernel used.
+ */
+unsigned long saved_max_pfn;
+#endif
+
 /* return the number of _pages_ that will be allocated for the boot bitmap */
 unsigned long __init bootmem_bootmap_pages (unsigned long pages)
 {
@@ -57,7 +65,7 @@ static unsigned long __init init_bootmem_core (pg_data_t *pgdat,
         pgdat->pgdat_next = pgdat_list;
         pgdat_list = pgdat;
 
-        mapsize = (mapsize + (sizeof(long) - 1UL)) & ~(sizeof(long) - 1UL);
+        mapsize = ALIGN(mapsize, sizeof(long));
         bdata->node_bootmem_map = phys_to_virt(mapstart << PAGE_SHIFT);
         bdata->node_boot_start = (start << PAGE_SHIFT);
         bdata->node_low_pfn = end;
@@ -178,7 +186,7 @@ __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size,
         } else
                 preferred = 0;
 
-        preferred = ((preferred + align - 1) & ~(align - 1)) >> PAGE_SHIFT;
+        preferred = ALIGN(preferred, align) >> PAGE_SHIFT;
         preferred += offset;
         areasize = (size+PAGE_SIZE-1)/PAGE_SIZE;
         incr = align >> PAGE_SHIFT ? : 1;
@@ -219,7 +227,7 @@ found:
          */
         if (align < PAGE_SIZE &&
             bdata->last_offset && bdata->last_pos+1 == start) {
-                offset = (bdata->last_offset+align-1) & ~(align-1);
+                offset = ALIGN(bdata->last_offset, align);
                 BUG_ON(offset > PAGE_SIZE);
                 remaining_size = PAGE_SIZE-offset;
                 if (size < remaining_size) {
diff --git a/mm/filemap.c b/mm/filemap.c
index 7332194d7afd..c11418dd94e8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1851,8 +1851,11 @@ generic_file_direct_write(struct kiocb *iocb, const struct iovec *iov,
          * i_sem is held, which protects generic_osync_inode() from
          * livelocking.
          */
-        if (written >= 0 && file->f_flags & O_SYNC)
-                generic_osync_inode(inode, mapping, OSYNC_METADATA);
+        if (written >= 0 && ((file->f_flags & O_SYNC) || IS_SYNC(inode))) {
+                int err = generic_osync_inode(inode, mapping, OSYNC_METADATA);
+                if (err < 0)
+                        written = err;
+        }
         if (written == count && !is_sync_kiocb(iocb))
                 written = -EIOCBQUEUED;
         return written;
@@ -1951,7 +1954,9 @@ generic_file_buffered_write(struct kiocb *iocb, const struct iovec *iov,
                                 if (unlikely(nr_segs > 1)) {
                                         filemap_set_next_iovec(&cur_iov,
                                                         &iov_base, status);
-                                        buf = cur_iov->iov_base + iov_base;
+                                        if (count)
+                                                buf = cur_iov->iov_base +
+                                                        iov_base;
                                 } else {
                                         iov_base += status;
                                 }
diff --git a/mm/memory.c b/mm/memory.c
index c256175742ac..beabdefa6254 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1139,7 +1139,7 @@ int remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
 {
         pgd_t *pgd;
         unsigned long next;
-        unsigned long end = addr + size;
+        unsigned long end = addr + PAGE_ALIGN(size);
         struct mm_struct *mm = vma->vm_mm;
         int err;
 
diff --git a/mm/page_io.c b/mm/page_io.c
index 667c76df1ec2..2e605a19ce57 100644
--- a/mm/page_io.c
+++ b/mm/page_io.c
@@ -127,7 +127,7 @@ out:
         return ret;
 }
 
-#if defined(CONFIG_SOFTWARE_SUSPEND) || defined(CONFIG_PM_DISK)
+#ifdef CONFIG_SOFTWARE_SUSPEND
 /*
  * A scruffy utility function to read or write an arbitrary swap page
  * and wait on the I/O.  The caller must have a ref on the page.