+ mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch added to -mm tree

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

The patch titled
     Subject: mm/swapfile.c: found_free could be represented by (tmp < max)
has been added to the -mm tree.  Its filename is
     mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/mm-swapfilec-found_free-could-be-represented-by-tmp-max.patch

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------------------------------------------------------
From: Wei Yang <richard.weiyang@gmail.com>
Subject: mm/swapfile.c: found_free could be represented by (tmp < max)

This is not necessary to use the variable found_free to record the status.
Just check tmp and max is enough.

Link: http://lkml.kernel.org/r/20200421213824.8099-1-richard.weiyang@gmail.com
Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Reviewed-by: "Huang, Ying" <ying.huang@intel.com>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/swapfile.c |   11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

--- a/mm/swapfile.c~mm-swapfilec-found_free-could-be-represented-by-tmp-max
+++ a/mm/swapfile.c
@@ -601,7 +601,6 @@ static bool scan_swap_map_try_ssd_cluste
 {
 	struct percpu_cluster *cluster;
 	struct swap_cluster_info *ci;
-	bool found_free;
 	unsigned long tmp, max;
 
 new_cluster:
@@ -623,8 +622,6 @@ new_cluster:
 			return false;
 	}
 
-	found_free = false;
-
 	/*
 	 * Other CPUs can use our cluster if they can't find a free cluster,
 	 * check if there is still free entry in the cluster
@@ -638,21 +635,19 @@ new_cluster:
 	}
 	ci = lock_cluster(si, tmp);
 	while (tmp < max) {
-		if (!si->swap_map[tmp]) {
-			found_free = true;
+		if (!si->swap_map[tmp])
 			break;
-		}
 		tmp++;
 	}
 	unlock_cluster(ci);
-	if (!found_free) {
+	if (tmp >= max) {
 		cluster_set_null(&cluster->index);
 		goto new_cluster;
 	}
 	cluster->next = tmp + 1;
 	*offset = tmp;
 	*scan_base = tmp;
-	return found_free;
+	return tmp < max;
 }
 
 static void __del_from_avail_list(struct swap_info_struct *p)
_

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-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