Re: [GIT PULL] y2038 changes for vfs

From: Linus Torvalds
Date: Tue May 24 2016 - 18:44:20 EST

On Tue, May 24, 2016 at 3:23 PM, Linus Torvalds
<torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:
> Just as an example: code that does
> dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
> could pretty mechanically be converted to
> dir->i_mtime = dir->i_ctime = current_fs_time(sb);

Actually, looking at the users, most of them don't have the superblock
directly as a variable, so it might be better to just make
current_fs_time() take the inode pointer instead.

That would make the conversion simpler, and it can then do the
inode->i_sb thing when it is converted to actually take the filesystem
limits and time granularity into account.

I suspect you could do 95% with a fairly simply coccinelle script. Or
even just use 'sed', with something like

sed 's/\([a-z]*\)->i_\([amc]\)time = CURRENT_TIME_SEC/\1->i_\2time =

seems to get close.

Run that over the tree, fix up the few cases it doesn't catch, remove
the broken CURRENT_TIME_SEC thing, and voilÃ, you're pretty much done.