On 4/14/2021 12:53 AM, Christoph Hellwig wrote:

On Mon, Apr 12, 2021 at 08:48:08AM -0700, Darrick J. Wong wrote:

quoted

A couple of revisions ago I specifically asked Gustavo to create these
'silly' sizeof helpers to clean up...

quoted

quoted

-					(sizeof(struct xfs_efd_log_item) +
-					(XFS_EFD_MAX_FAST_EXTENTS - 1) *
-					sizeof(struct xfs_extent)),
-					0, 0, NULL);
+					 struct_size((struct xfs_efd_log_item *)0,
+					 efd_format.efd_extents,
+					 XFS_EFD_MAX_FAST_EXTENTS),

...these even uglier multiline statements.  I was also going to ask for
these kmem cache users to get cleaned up.  I'd much rather look at:

	xfs_efi_zone = kmem_cache_create("xfs_efi_item",
				sizeof_xfs_efi(XFS_EFI_MAX_FAST_EXTENTS), 0);
	if (!xfs_efi_zone)
		goto the_drop_zone;

even if it means another static inline.

Which doesn't really work with struct_size or rather leads to a mess
like the above as struct_size really wants a variable and not just a
type.  Making it really nasty for both allocations and creating slab
caches.  I tried to find a workaround for that, but that makes the
compiler unhappy based its inlining heuristics.

Anyway, a lot of the helpers are pretty silly as they duplicate stuff
without cleaning up the underlying mess.  I tried to sort much of this
out here, still WIP:

http://git.infradead.org/users/hch/xfs.git/shortlog/refs/heads/xfs-array-size

Hi xfs maintainers,

Kindly ping, is there any new progress on this patch series?

Best Regards,
Rong Chen