[PATCH] dm-stats: fix merge accounting

There were wrong parentheses when setting stats_aux->merged, so that
merging was never properly accounted. This commit fixes it.

Signed-off-by: Mikulas Patocka <[email protected]>
Assisted-by: Claude:claude-opus-4-6
Fixes: fd2ed4d25270 ("dm: add statistics support")
Cc: [email protected]

---
 drivers/md/dm-stats.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

Index: linux-2.6/drivers/md/dm-stats.c
===================================================================
--- linux-2.6.orig/drivers/md/dm-stats.c	2026-02-23 19:31:52.000000000 +0100
+++ linux-2.6/drivers/md/dm-stats.c	2026-07-10 15:38:59.000000000 +0200
@@ -692,10 +692,8 @@ void dm_stats_account_io(struct dm_stats
 		 */
 		last = raw_cpu_ptr(stats->last);
 		stats_aux->merged =
-			(bi_sector == (READ_ONCE(last->last_sector) &&
-				       ((bi_rw == WRITE) ==
-					(READ_ONCE(last->last_rw) == WRITE))
-				       ));
+			bi_sector == READ_ONCE(last->last_sector) &&
+				(bi_rw == WRITE) == (READ_ONCE(last->last_rw) == WRITE);
 		WRITE_ONCE(last->last_sector, end_sector);
 		WRITE_ONCE(last->last_rw, bi_rw);
 	} else