From eee4dabf625a44ee556cf6869bd90d54364cf38b Mon Sep 17 00:00:00 2001 From: Akira Fujita Date: Tue, 24 Nov 2009 10:31:56 -0500 Subject: [PATCH] ext4: move_extent_per_page() cleanup (cherry picked from commit ac48b0a1d068887141581bea8285de5fcab182b0) Integrate duplicate lines (acquire/release semaphore and invalidate extent cache in move_extent_per_page()) into mext_replace_branches(), to reduce source and object code size. Signed-off-by: Akira Fujita Signed-off-by: "Theodore Ts'o" Signed-off-by: Greg Kroah-Hartman --- fs/ext4/move_extent.c | 30 +++++++++--------------------- 1 file changed, 9 insertions(+), 21 deletions(-) diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 51180655df74..80d6c48380cf 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -660,6 +660,9 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode, int replaced_count = 0; int dext_alen; + /* Protect extent trees against block allocations via delalloc */ + double_down_write_data_sem(orig_inode, donor_inode); + /* Get the original extent for the block "orig_off" */ *err = get_ext_path(orig_inode, orig_off, &orig_path); if (*err) @@ -755,6 +758,11 @@ out: kfree(donor_path); } + ext4_ext_invalidate_cache(orig_inode); + ext4_ext_invalidate_cache(donor_inode); + + double_up_write_data_sem(orig_inode, donor_inode); + return replaced_count; } @@ -820,19 +828,9 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode, * Just swap data blocks between orig and donor. */ if (uninit) { - /* - * Protect extent trees against block allocations - * via delalloc - */ - double_down_write_data_sem(orig_inode, donor_inode); replaced_count = mext_replace_branches(handle, orig_inode, donor_inode, orig_blk_offset, block_len_in_page, err); - - /* Clear the inode cache not to refer to the old data */ - ext4_ext_invalidate_cache(orig_inode); - ext4_ext_invalidate_cache(donor_inode); - double_up_write_data_sem(orig_inode, donor_inode); goto out2; } @@ -880,8 +878,6 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode, /* Release old bh and drop refs */ try_to_release_page(page, 0); - /* Protect extent trees against block allocations via delalloc */ - double_down_write_data_sem(orig_inode, donor_inode); replaced_count = mext_replace_branches(handle, orig_inode, donor_inode, orig_blk_offset, block_len_in_page, &err2); @@ -890,18 +886,10 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode, block_len_in_page = replaced_count; replaced_size = block_len_in_page << orig_inode->i_blkbits; - } else { - double_up_write_data_sem(orig_inode, donor_inode); + } else goto out; - } } - /* Clear the inode cache not to refer to the old data */ - ext4_ext_invalidate_cache(orig_inode); - ext4_ext_invalidate_cache(donor_inode); - - double_up_write_data_sem(orig_inode, donor_inode); - if (!page_has_buffers(page)) create_empty_buffers(page, 1 << orig_inode->i_blkbits, 0); -- 2.39.5