[patch 262/262] mm/damon: remove return value from before_terminate callback

Andrew Morton
2021-11-05T20:48:30Z

From: Changbin Du <changbin.du@gmail.com>
Subject: mm/damon: remove return value from before_terminate callback

Since the return value of 'before_terminate' callback is never used,
we make it have no return value.

Link: https://lkml.kernel.org/r/20211029005023.8895-1-changbin.du@gmail.com
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

include/linux/damon.h | 2 +-
mm/damon/dbgfs.c | 5 ++---
2 files changed, 3 insertions(+), 4 deletions(-)

--- a/include/linux/damon.h~mm-damon-remove-return-value-from-before_terminate-callback
+++ a/include/linux/damon.h
@@ -322,7 +322,7 @@ struct damon_callback {
int (*before_start)(struct damon_ctx *context);
int (*after_sampling)(struct damon_ctx *context);
int (*after_aggregation)(struct damon_ctx *context);
- int (*before_terminate)(struct damon_ctx *context);
+ void (*before_terminate)(struct damon_ctx *context);
};

/**
--- a/mm/damon/dbgfs.c~mm-damon-remove-return-value-from-before_terminate-callback
+++ a/mm/damon/dbgfs.c
@@ -645,18 +645,17 @@ static void dbgfs_fill_ctx_dir(struct de
debugfs_create_file(file_names[i], 0600, dir, ctx, fops[i]);
}

-static int dbgfs_before_terminate(struct damon_ctx *ctx)
+static void dbgfs_before_terminate(struct damon_ctx *ctx)
{
struct damon_target *t, *next;

if (!targetid_is_pid(ctx))
- return 0;
+ return;

damon_for_each_target_safe(t, next, ctx) {
put_pid((struct pid *)t->id);
damon_destroy_target(t);
}
- return 0;
}

static struct damon_ctx *dbgfs_new_ctx(void)
_