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Message-Id: <1482249341-21113-1-git-send-email-jlayton@redhat.com> Date: Tue, 20 Dec 2016 10:55:41 -0500 From: Jeff Layton <jlayton@...hat.com> To: tytso@....edu, adilger.kernel@...ger.ca Cc: linux-ext4@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [RFC PATCH] ext4: convert swap_inode_data() over to use swap() on most of the fields For some odd reason, it forces a byte-by-byte copy of each field. A plain old swap() on most of these fields would be more efficient. We do need to retain one memswap however as that field is an array. Signed-off-by: Jeff Layton <jlayton@...hat.com> --- fs/ext4/ioctl.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 49fd1371bfa2..fb844da4836f 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -60,18 +60,16 @@ static void swap_inode_data(struct inode *inode1, struct inode *inode2) ei1 = EXT4_I(inode1); ei2 = EXT4_I(inode2); - memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); - memswap(&inode1->i_version, &inode2->i_version, - sizeof(inode1->i_version)); - memswap(&inode1->i_blocks, &inode2->i_blocks, - sizeof(inode1->i_blocks)); - memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); - memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); - memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); + swap(inode1->i_flags, inode2->i_flags); + swap(inode1->i_version, inode2->i_version); + swap(inode1->i_blocks, inode2->i_blocks); + swap(inode1->i_bytes, inode2->i_bytes); + swap(inode1->i_atime, inode2->i_atime); + swap(inode1->i_mtime, inode2->i_mtime); memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); - memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); - memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); + swap(ei1->i_flags, ei2->i_flags); + swap(ei1->i_disksize, ei2->i_disksize); ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); -- 2.7.4
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