Merge tag 'refactor-rtbitmap-accessors-6.7_2023-10-19' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux into xfs-6.7-mergeA

xfs: refactor rtbitmap/summary accessors [v1.2]

Since the rtbitmap and rtsummary accessor functions have proven more
controversial than the rest of the macro refactoring, split the patchset
into two to make review easier.

v1.1: various cleanups suggested by hch
v1.2: rework the accessor functions to reduce the amount of cursor
      tracking required, and create explicit bitmap/summary logging
      functions

With a bit of luck, this should all go splendidly.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

* tag 'refactor-rtbitmap-accessors-6.7_2023-10-19' of https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux:
  xfs: use accessor functions for summary info words
  xfs: create helpers for rtsummary block/wordcount computations
  xfs: use accessor functions for bitmap words
  xfs: create a helper to handle logging parts of rt bitmap/summary blocks

Author: Chandan Babu R

fs/xfs/libxfs/xfs_format.h

@@ -690,6 +690,22 @@ struct xfs_agfl {
 	    ASSERT(xfs_daddr_to_agno(mp, d) == \
 		   xfs_daddr_to_agno(mp, (d) + (len) - 1)))
 
+/*
+ * Realtime bitmap information is accessed by the word, which is currently
+ * stored in host-endian format.
+ */
+union xfs_rtword_raw {
+	__u32		old;
+};
+
+/*
+ * Realtime summary counts are accessed by the word, which is currently
+ * stored in host-endian format.
+ */
+union xfs_suminfo_raw {
+	__u32		old;
+};
+
 /*
  * XFS Timestamps
  * ==============