[25/37] xfs: use kfree_rcu_mightsleep to free the perag structures

Commit Message

Darrick J. Wong Oct. 21, 2024, 10:05 p.m. UTC

From: Christoph Hellwig <[e-mail]>

Source kernel commit: 4ef7c6d39dc72dae983b836c8b2b5de7128c0da3

Using the kfree_rcu_mightsleep is simpler and removes the need for a
rcu_head in the perag structure.

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Darrick J. Wong <[e-mail]>
Signed-off-by: Chandan Babu R <[e-mail]>
---
 include/kmem.h  |    5 +++++
 libxfs/xfs_ag.c |   12 +-----------
 libxfs/xfs_ag.h |    3 ---
 3 files changed, 6 insertions(+), 14 deletions(-)

Patch

diff --git a/include/kmem.h b/include/kmem.h
index 8739d824008e2a..16a7957f1acee3 100644
--- a/include/kmem.h
+++ b/include/kmem.h
@@ -71,6 +71,11 @@  static inline void kvfree(const void *ptr)
 	kfree(ptr);
 }
 
+static inline void kfree_rcu_mightsleep(const void *ptr)
+{
+	kfree(ptr);
+}
+
 __attribute__((format(printf,2,3)))
 char *kasprintf(gfp_t gfp, const char *fmt, ...);
 
diff --git a/libxfs/xfs_ag.c b/libxfs/xfs_ag.c
index ed9ac7f58d1aba..1b65ba983ad542 100644
--- a/libxfs/xfs_ag.c
+++ b/libxfs/xfs_ag.c
@@ -233,16 +233,6 @@  xfs_initialize_perag_data(
 	return error;
 }
 
-STATIC void
-__xfs_free_perag(
-	struct rcu_head	*head)
-{
-	struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
-
-	ASSERT(!delayed_work_pending(&pag->pag_blockgc_work));
-	kfree(pag);
-}
-
 /*
  * Free up the per-ag resources associated with the mount structure.
  */
@@ -268,7 +258,7 @@  xfs_free_perag(
 		xfs_perag_rele(pag);
 		XFS_IS_CORRUPT(pag->pag_mount,
 				atomic_read(&pag->pag_active_ref) != 0);
-		call_rcu(&pag->rcu_head, __xfs_free_perag);
+		kfree_rcu_mightsleep(pag);
 	}
 }
 
diff --git a/libxfs/xfs_ag.h b/libxfs/xfs_ag.h
index 35de09a2516c70..d62c266c0b44d5 100644
--- a/libxfs/xfs_ag.h
+++ b/libxfs/xfs_ag.h
@@ -63,9 +63,6 @@  struct xfs_perag {
 	/* Blocks reserved for the reverse mapping btree. */
 	struct xfs_ag_resv	pag_rmapbt_resv;
 
-	/* for rcu-safe freeing */
-	struct rcu_head	rcu_head;
-
 	/* Precalculated geometry info */
 	xfs_agblock_t		block_count;
 	xfs_agblock_t		min_block;