+ mm-damon-dbgfs-remove-a-unnecessary-variable.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm/damon/dbgfs: remove an unnecessary variable
has been added to the -mm tree.  Its filename is
     mm-damon-dbgfs-remove-a-unnecessary-variable.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-damon-dbgfs-remove-a-unnecessary-variable.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-damon-dbgfs-remove-a-unnecessary-variable.patch

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------------------------------------------------------
From: SeongJae Park <sj@kernel.org>
Subject: mm/damon/dbgfs: remove an unnecessary variable

Patch series "mm/damon: Hide unnecessary information disclosures".

DAMON is exposing some unnecessary information including kernel pointer
in kernel log and tracepoint.  This patchset hides such information.
The first patch is only for a trivial cleanup, though.


This patch (of 4):

This commit removes a unnecessarily used variable in
dbgfs_target_ids_write().

Link: https://lkml.kernel.org/r/20211229131016.23641-1-sj@kernel.org
Link: https://lkml.kernel.org/r/20211229131016.23641-2-sj@kernel.org
Fixes: 4bc05954d007 ("mm/damon: implement a debugfs-based user space interface")
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/damon/dbgfs.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

--- a/mm/damon/dbgfs.c~mm-damon-dbgfs-remove-a-unnecessary-variable
+++ a/mm/damon/dbgfs.c
@@ -363,7 +363,7 @@ static ssize_t dbgfs_target_ids_write(st
 {
 	struct damon_ctx *ctx = file->private_data;
 	bool id_is_pid = true;
-	char *kbuf, *nrs;
+	char *kbuf;
 	unsigned long *targets;
 	ssize_t nr_targets;
 	ssize_t ret;
@@ -373,14 +373,13 @@ static ssize_t dbgfs_target_ids_write(st
 	if (IS_ERR(kbuf))
 		return PTR_ERR(kbuf);
 
-	nrs = kbuf;
 	if (!strncmp(kbuf, "paddr\n", count)) {
 		id_is_pid = false;
 		/* target id is meaningless here, but we set it just for fun */
 		scnprintf(kbuf, count, "42    ");
 	}
 
-	targets = str_to_target_ids(nrs, count, &nr_targets);
+	targets = str_to_target_ids(kbuf, count, &nr_targets);
 	if (!targets) {
 		ret = -ENOMEM;
 		goto out;
_

Patches currently in -mm which might be from sj@kernel.org are

mm-damon-remove-some-no-need-func-definitions-in-damonh-file-fix.patch
mm-damon-convert-macro-functions-to-static-inline-functions.patch
docs-admin-guide-mm-damon-usage-update-for-scheme-quotas-and-watermarks.patch
docs-admin-guide-mm-damon-usage-remove-redundant-information.patch
docs-admin-guide-mm-damon-usage-mention-tracepoint-at-the-beginning.patch
docs-admin-guide-mm-damon-usage-update-for-kdamond_pid-and-mkrm_contexts.patch
mm-damon-remove-a-mistakenly-added-comment-for-a-future-feature.patch
mm-damon-schemes-account-scheme-actions-that-successfully-applied.patch
mm-damon-schemes-account-how-many-times-quota-limit-has-exceeded.patch
mm-damon-reclaim-provide-reclamation-statistics.patch
docs-admin-guide-mm-damon-reclaim-document-statistics-parameters.patch
mm-damon-dbgfs-support-all-damos-stats.patch
docs-admin-guide-mm-damon-usage-update-for-schemes-statistics.patch
mm-damon-dbgfs-remove-a-unnecessary-variable.patch
mm-damon-vaddr-use-pr_debug-for-damon_va_three_regions-failure-logging.patch
mm-damon-vaddr-hide-kernel-pointer-from-damon_va_three_regions-failure-log.patch
mm-damon-hide-kernel-pointer-from-tracepoint-event.patch