Merge commit 'v3.6-rc5' into next

* commit 'v3.6-rc5': (1098 commits)
  Linux 3.6-rc5
  HID: tpkbd: work even if the new Lenovo Keyboard driver is not configured
  Remove user-triggerable BUG from mpol_to_str
  xen/pciback: Fix proper FLR steps.
  uml: fix compile error in deliver_alarm()
  dj: memory scribble in logi_dj
  Fix order of arguments to compat_put_time[spec|val]
  xen: Use correct masking in xen_swiotlb_alloc_coherent.
  xen: fix logical error in tlb flushing
  xen/p2m: Fix one-off error in checking the P2M tree directory.
  powerpc: Don't use __put_user() in patch_instruction
  powerpc: Make sure IPI handlers see data written by IPI senders
  powerpc: Restore correct DSCR in context switch
  powerpc: Fix DSCR inheritance in copy_thread()
  powerpc: Keep thread.dscr and thread.dscr_inherit in sync
  powerpc: Update DSCR on all CPUs when writing sysfs dscr_default
  powerpc/powernv: Always go into nap mode when CPU is offline
  powerpc: Give hypervisor decrementer interrupts their own handler
  powerpc/vphn: Fix arch_update_cpu_topology() return value
  ARM: gemini: fix the gemini build
  ...

Conflicts:
	drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
	drivers/rapidio/devices/tsi721.c

5 files changed, 45 insertions, 46 deletions

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index d23b31ca9d7a..1b5089067d01 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -280,14 +280,18 @@ struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
         return desc;
 }
 
-static int ext4_valid_block_bitmap(struct super_block *sb,
-                                   struct ext4_group_desc *desc,
-                                   unsigned int block_group,
-                                   struct buffer_head *bh)
+/*
+ * Return the block number which was discovered to be invalid, or 0 if
+ * the block bitmap is valid.
+ */
+static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb,
+                                            struct ext4_group_desc *desc,
+                                            unsigned int block_group,
+                                            struct buffer_head *bh)
 {
         ext4_grpblk_t offset;
         ext4_grpblk_t next_zero_bit;
-        ext4_fsblk_t bitmap_blk;
+        ext4_fsblk_t blk;
         ext4_fsblk_t group_first_block;
 
         if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
@@ -297,37 +301,33 @@ static int ext4_valid_block_bitmap(struct super_block *sb,
                  * or it has to also read the block group where the bitmaps
                  * are located to verify they are set.
                  */
-                return 1;
+                return 0;
         }
         group_first_block = ext4_group_first_block_no(sb, block_group);
 
         /* check whether block bitmap block number is set */
-        bitmap_blk = ext4_block_bitmap(sb, desc);
-        offset = bitmap_blk - group_first_block;
+        blk = ext4_block_bitmap(sb, desc);
+        offset = blk - group_first_block;
         if (!ext4_test_bit(offset, bh->b_data))
                 /* bad block bitmap */
-                goto err_out;
+                return blk;
 
         /* check whether the inode bitmap block number is set */
-        bitmap_blk = ext4_inode_bitmap(sb, desc);
-        offset = bitmap_blk - group_first_block;
+        blk = ext4_inode_bitmap(sb, desc);
+        offset = blk - group_first_block;
         if (!ext4_test_bit(offset, bh->b_data))
                 /* bad block bitmap */
-                goto err_out;
+                return blk;
 
         /* check whether the inode table block number is set */
-        bitmap_blk = ext4_inode_table(sb, desc);
-        offset = bitmap_blk - group_first_block;
+        blk = ext4_inode_table(sb, desc);
+        offset = blk - group_first_block;
         next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
                                 offset + EXT4_SB(sb)->s_itb_per_group,
                                 offset);
-        if (next_zero_bit >= offset + EXT4_SB(sb)->s_itb_per_group)
-                /* good bitmap for inode tables */
-                return 1;
-
-err_out:
-        ext4_error(sb, "Invalid block bitmap - block_group = %d, block = %llu",
-                        block_group, bitmap_blk);
+        if (next_zero_bit < offset + EXT4_SB(sb)->s_itb_per_group)
+                /* bad bitmap for inode tables */
+                return blk;
         return 0;
 }
 
@@ -336,14 +336,26 @@ void ext4_validate_block_bitmap(struct super_block *sb,
                                unsigned int block_group,
                                struct buffer_head *bh)
 {
+        ext4_fsblk_t    blk;
+
         if (buffer_verified(bh))
                 return;
 
         ext4_lock_group(sb, block_group);
-        if (ext4_valid_block_bitmap(sb, desc, block_group, bh) &&
-            ext4_block_bitmap_csum_verify(sb, block_group, desc, bh,
-                                          EXT4_BLOCKS_PER_GROUP(sb) / 8))
-                set_buffer_verified(bh);
+        blk = ext4_valid_block_bitmap(sb, desc, block_group, bh);
+        if (unlikely(blk != 0)) {
+                ext4_unlock_group(sb, block_group);
+                ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
+                           block_group, blk);
+                return;
+        }
+        if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
+                        desc, bh, EXT4_BLOCKS_PER_GROUP(sb) / 8))) {
+                ext4_unlock_group(sb, block_group);
+                ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
+                return;
+        }
+        set_buffer_verified(bh);
         ext4_unlock_group(sb, block_group);
 }
 
diff --git a/fs/ext4/bitmap.c b/fs/ext4/bitmap.c
index f8716eab9995..5c2d1813ebe9 100644
--- a/fs/ext4/bitmap.c
+++ b/fs/ext4/bitmap.c
@@ -79,7 +79,6 @@ int ext4_block_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
         if (provided == calculated)
                 return 1;
 
-        ext4_error(sb, "Bad block bitmap checksum: block_group = %u", group);
         return 0;
 }
 
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index cd0c7ed06772..aabbb3f53683 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2662,6 +2662,7 @@ cont:
                 }
                 path[0].p_depth = depth;
                 path[0].p_hdr = ext_inode_hdr(inode);
+                i = 0;
 
                 if (ext4_ext_check(inode, path[0].p_hdr, depth)) {
                         err = -EIO;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 6324f74e0342..dff171c3a123 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1970,7 +1970,7 @@ static void ext4_end_io_buffer_write(struct buffer_head *bh, int uptodate);
  * This function can get called via...
  *   - ext4_da_writepages after taking page lock (have journal handle)
  *   - journal_submit_inode_data_buffers (no journal handle)
- *   - shrink_page_list via pdflush (no journal handle)
+ *   - shrink_page_list via the kswapd/direct reclaim (no journal handle)
  *   - grab_page_cache when doing write_begin (have journal handle)
  *
  * We don't do any block allocation in this function. If we have page with
@@ -4589,14 +4589,6 @@ static int ext4_expand_extra_isize(struct inode *inode,
  * inode out, but prune_icache isn't a user-visible syncing function.
  * Whenever the user wants stuff synced (sys_sync, sys_msync, sys_fsync)
  * we start and wait on commits.
- *
- * Is this efficient/effective?  Well, we're being nice to the system
- * by cleaning up our inodes proactively so they can be reaped
- * without I/O.  But we are potentially leaving up to five seconds'
- * worth of inodes floating about which prune_icache wants us to
- * write out.  One way to fix that would be to get prune_icache()
- * to do a write_super() to free up some memory.  It has the desired
- * effect.
  */
 int ext4_mark_inode_dirty(handle_t *handle, struct inode *inode)
 {
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d76ec8277d3f..c6e0cb3d1f4a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -326,11 +326,6 @@ static void ext4_put_nojournal(handle_t *handle)
 
 /*
  * Wrappers for jbd2_journal_start/end.
- *
- * The only special thing we need to do here is to make sure that all
- * journal_end calls result in the superblock being marked dirty, so
- * that sync() will call the filesystem's write_super callback if
- * appropriate.
  */
 handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
 {
@@ -356,12 +351,6 @@ handle_t *ext4_journal_start_sb(struct super_block *sb, int nblocks)
         return jbd2_journal_start(journal, nblocks);
 }
 
-/*
- * The only special thing we need to do here is to make sure that all
- * jbd2_journal_stop calls result in the superblock being marked dirty, so
- * that sync() will call the filesystem's write_super callback if
- * appropriate.
- */
 int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
 {
         struct super_block *sb;
@@ -959,6 +948,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
         ei->i_reserved_meta_blocks = 0;
         ei->i_allocated_meta_blocks = 0;
         ei->i_da_metadata_calc_len = 0;
+        ei->i_da_metadata_calc_last_lblock = 0;
         spin_lock_init(&(ei->i_block_reservation_lock));
 #ifdef CONFIG_QUOTA
         ei->i_reserved_quota = 0;
@@ -3119,6 +3109,10 @@ static int count_overhead(struct super_block *sb, ext4_group_t grp,
         ext4_group_t            i, ngroups = ext4_get_groups_count(sb);
         int                     s, j, count = 0;
 
+        if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC))
+                return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) +
+                        sbi->s_itb_per_group + 2);
+
         first_block = le32_to_cpu(sbi->s_es->s_first_data_block) +
                 (grp * EXT4_BLOCKS_PER_GROUP(sb));
         last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1;
@@ -4430,6 +4424,7 @@ static void ext4_clear_journal_err(struct super_block *sb,
                 ext4_commit_super(sb, 1);
 
                 jbd2_journal_clear_err(journal);
+                jbd2_journal_update_sb_errno(journal);
         }
 }