+ mm-swapfilec-__swap_entry_free-always-free-1-entry.patch added to -mm tree

+ mm-swapfilec-__swap_entry_free-always-free-1-entry.patch added to -mm tree

[akpm]

The patch titled
     Subject: mm/swapfile.c: __swap_entry_free() always free 1 entry
has been added to the -mm tree.  Its filename is
     mm-swapfilec-__swap_entry_free-always-free-1-entry.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-swapfilec-__swap_entry_free-always-free-1-entry.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-swapfilec-__swap_entry_free-always-free-1-entry.patch

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------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: mm/swapfile.c: __swap_entry_free() always free 1 entry

__swap_entry_free() always frees 1 entry.  Let's remove the usage.

Link: http://lkml.kernel.org/r/20200501015259.32237-2-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/swapfile.c |    9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

--- a/mm/swapfile.c~mm-swapfilec-__swap_entry_free-always-free-1-entry
+++ a/mm/swapfile.c
@@ -1273,13 +1273,14 @@ unlock_out:
 }
 
 static unsigned char __swap_entry_free(struct swap_info_struct *p,
-				       swp_entry_t entry, unsigned char usage)
+				       swp_entry_t entry)
 {
 	struct swap_cluster_info *ci;
 	unsigned long offset = swp_offset(entry);
+	unsigned char usage;
 
 	ci = lock_cluster_or_swap_info(p, offset);
-	usage = __swap_entry_free_locked(p, offset, usage);
+	usage = __swap_entry_free_locked(p, offset, 1);
 	unlock_cluster_or_swap_info(p, ci);
 	if (!usage)
 		free_swap_slot(entry);
@@ -1314,7 +1315,7 @@ void swap_free(swp_entry_t entry)
 
 	p = _swap_info_get(entry);
 	if (p)
-		__swap_entry_free(p, entry, 1);
+		__swap_entry_free(p, entry);
 }
 
 /*
@@ -1737,7 +1738,7 @@ int free_swap_and_cache(swp_entry_t entr
 
 	p = _swap_info_get(entry);
 	if (p) {
-		count = __swap_entry_free(p, entry, 1);
+		count = __swap_entry_free(p, entry);
 		if (count == SWAP_HAS_CACHE &&
 		    !swap_page_trans_huge_swapped(p, entry))
 			__try_to_reclaim_swap(p, swp_offset(entry),
_

Patches currently in -mm which might be from richard.weiyang@gmail.com are

mm-swapfilec-offset-is-only-used-when-there-is-more-slots.patch
mm-swapfilec-explicitly-show-ssd-non-ssd-is-handled-mutually-exclusive.patch
mm-swapfilec-remove-the-unnecessary-goto-for-ssd-case.patch
mm-swapfilec-simplify-the-calculation-of-n_goal.patch
mm-swapfilec-remove-the-extra-check-in-scan_swap_map_slots.patch
mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch
mm-swapfilec-tmp-is-always-smaller-than-max.patch
mm-swapfilec-omit-a-duplicate-code-by-compare-tmp-and-max-first.patch
mm-swapfilec-classify-swap_map_xxx-to-make-it-more-readable.patch
mm-swapfilec-__swap_entry_free-always-free-1-entry.patch
mm-page_allocc-bad_-is-not-necessary-when-pagehwpoison.patch
mm-page_allocc-bad_flags-is-not-necessary-for-bad_page.patch
mm-page_allocc-rename-free_pages_check_bad-to-check_free_page_bad.patch
mm-page_allocc-rename-free_pages_check-to-check_free_page.patch
mm-page_allocc-extract-check__page_bad-common-part-to-page_bad_reason.patch
mm-page_allocc-use-node_mask_none-in-build_zonelists.patch
mm-rename-gfpflags_to_migratetype-to-gfp_migratetype-for-same-convention.patch
mm-vmscanc-use-update_lru_size-in-update_lru_sizes.patch