Merge tag 'v5.11-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next

Backmerge v5.11-rc5 into drm-next to clean up a bunch of conflicts we are dragging around.

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 21 insertions, 4 deletions

diff --git a/fs/afs/xdr_fs.h b/fs/afs/xdr_fs.h
index 94f1f398eefa..8ca868164507 100644
--- a/fs/afs/xdr_fs.h
+++ b/fs/afs/xdr_fs.h
@@ -54,10 +54,16 @@ union afs_xdr_dirent {
 		__be16		hash_next;
 		__be32		vnode;
 		__be32		unique;
-		u8		name[16];
-		u8		overflow[4];	/* if any char of the name (inc
-						 * NUL) reaches here, consume
-						 * the next dirent too */
+		u8		name[];
+		/* When determining the number of dirent slots needed to
+		 * represent a directory entry, name should be assumed to be 16
+		 * bytes, due to a now-standardised (mis)calculation, but it is
+		 * in fact 20 bytes in size.  afs_dir_calc_slots() should be
+		 * used for this.
+		 *
+		 * For names longer than (16 or) 20 bytes, extra slots should
+		 * be annexed to this one using the extended_name format.
+		 */
 	} u;
 	u8			extended_name[32];
 } __packed;
@@ -96,4 +102,15 @@ struct afs_xdr_dir_page {
 	union afs_xdr_dir_block	blocks[AFS_DIR_BLOCKS_PER_PAGE];
 };
 
+/*
+ * Calculate the number of dirent slots required for any given name length.
+ * The calculation is made assuming the part of the name in the first slot is
+ * 16 bytes, rather than 20, but this miscalculation is now standardised.
+ */
+static inline unsigned int afs_dir_calc_slots(size_t name_len)
+{
+	name_len++; /* NUL-terminated */
+	return 1 + ((name_len + 15) / AFS_DIR_DIRENT_SIZE);
+}
+
 #endif /* XDR_FS_H */