+ scatterlist-inline-sg_next.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: scatterlist: inline sg_next()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     scatterlist-inline-sg_next.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scatterlist-inline-sg_next.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Caleb Sander Mateos <csander@purestorage.com>
Subject: scatterlist: inline sg_next()
Date: Wed, 16 Apr 2025 10:06:13 -0600

sg_next() is a short function called frequently in I/O paths. Define it
in the header file so it can be inlined into its callers.

Link: https://lkml.kernel.org/r/20250416160615.3571958-1-csander@purestorage.com
Signed-off-by: Caleb Sander Mateos <csander@purestorage.com>
Cc: Eric Biggers <ebiggers@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/scatterlist.h |   23 ++++++++++++++++++++++-
 lib/scatterlist.c           |   23 -----------------------
 2 files changed, 22 insertions(+), 24 deletions(-)

--- a/include/linux/scatterlist.h~scatterlist-inline-sg_next
+++ a/include/linux/scatterlist.h
@@ -95,6 +95,28 @@ static inline bool sg_is_last(struct sca
 }
 
 /**
+ * sg_next - return the next scatterlist entry in a list
+ * @sg:		The current sg entry
+ *
+ * Description:
+ *   Usually the next entry will be @sg@ + 1, but if this sg element is part
+ *   of a chained scatterlist, it could jump to the start of a new
+ *   scatterlist array.
+ *
+ **/
+static inline struct scatterlist *sg_next(struct scatterlist *sg)
+{
+	if (sg_is_last(sg))
+		return NULL;
+
+	sg++;
+	if (unlikely(sg_is_chain(sg)))
+		sg = sg_chain_ptr(sg);
+
+	return sg;
+}
+
+/**
  * sg_assign_page - Assign a given page to an SG entry
  * @sg:		    SG entry
  * @page:	    The page
@@ -418,7 +440,6 @@ static inline void sg_init_marker(struct
 
 int sg_nents(struct scatterlist *sg);
 int sg_nents_for_len(struct scatterlist *sg, u64 len);
-struct scatterlist *sg_next(struct scatterlist *);
 struct scatterlist *sg_last(struct scatterlist *s, unsigned int);
 void sg_init_table(struct scatterlist *, unsigned int);
 void sg_init_one(struct scatterlist *, const void *, unsigned int);
--- a/lib/scatterlist.c~scatterlist-inline-sg_next
+++ a/lib/scatterlist.c
@@ -14,29 +14,6 @@
 #include <linux/folio_queue.h>
 
 /**
- * sg_next - return the next scatterlist entry in a list
- * @sg:		The current sg entry
- *
- * Description:
- *   Usually the next entry will be @sg@ + 1, but if this sg element is part
- *   of a chained scatterlist, it could jump to the start of a new
- *   scatterlist array.
- *
- **/
-struct scatterlist *sg_next(struct scatterlist *sg)
-{
-	if (sg_is_last(sg))
-		return NULL;
-
-	sg++;
-	if (unlikely(sg_is_chain(sg)))
-		sg = sg_chain_ptr(sg);
-
-	return sg;
-}
-EXPORT_SYMBOL(sg_next);
-
-/**
  * sg_nents - return total count of entries in scatterlist
  * @sg:		The scatterlist
  *
_

Patches currently in -mm which might be from csander@purestorage.com are

scatterlist-inline-sg_next.patch