The patch titled
Subject: mm/damon: return void from damon_set_schemes()
has been added to the -mm mm-unstable branch. Its filename is
mm-damon-return-void-from-damon_set_schemes.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-damon-return-void-from-damon_set_schemes.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
Subject: mm/damon: return void from damon_set_schemes()
Date: Fri, 16 Sep 2022 23:20:35 +0800
There is no point in returning an int from damon_set_schemes(). It always
returns 0 which is meaningless for the caller, so change it to return void
directly.
Link: https://lkml.kernel.org/r/1663341635-12675-1-git-send-email-kaixuxia@xxxxxxxxxxx
Signed-off-by: Kaixu Xia <kaixuxia@xxxxxxxxxxx>
Reviewed-by: SeongJae Park <sj@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/damon.h | 2 +-
mm/damon/core.c | 5 +----
mm/damon/dbgfs.c | 8 +++-----
mm/damon/lru_sort.c | 4 +---
mm/damon/reclaim.c | 4 +---
5 files changed, 7 insertions(+), 16 deletions(-)
--- a/include/linux/damon.h~mm-damon-return-void-from-damon_set_schemes
+++ a/include/linux/damon.h
@@ -541,7 +541,7 @@ unsigned int damon_nr_regions(struct dam
struct damon_ctx *damon_new_ctx(void);
void damon_destroy_ctx(struct damon_ctx *ctx);
int damon_set_attrs(struct damon_ctx *ctx, struct damon_attrs *attrs);
-int damon_set_schemes(struct damon_ctx *ctx,
+void damon_set_schemes(struct damon_ctx *ctx,
struct damos **schemes, ssize_t nr_schemes);
int damon_nr_running_ctxs(void);
bool damon_is_registered_ops(enum damon_ops_id id);
--- a/mm/damon/core.c~mm-damon-return-void-from-damon_set_schemes
+++ a/mm/damon/core.c
@@ -454,10 +454,8 @@ int damon_set_attrs(struct damon_ctx *ct
*
* This function should not be called while the kdamond of the context is
* running.
- *
- * Return: 0 if success, or negative error code otherwise.
*/
-int damon_set_schemes(struct damon_ctx *ctx, struct damos **schemes,
+void damon_set_schemes(struct damon_ctx *ctx, struct damos **schemes,
ssize_t nr_schemes)
{
struct damos *s, *next;
@@ -467,7 +465,6 @@ int damon_set_schemes(struct damon_ctx *
damon_destroy_scheme(s);
for (i = 0; i < nr_schemes; i++)
damon_add_scheme(ctx, schemes[i]);
- return 0;
}
/**
--- a/mm/damon/dbgfs.c~mm-damon-return-void-from-damon_set_schemes
+++ a/mm/damon/dbgfs.c
@@ -307,11 +307,9 @@ static ssize_t dbgfs_schemes_write(struc
goto unlock_out;
}
- ret = damon_set_schemes(ctx, schemes, nr_schemes);
- if (!ret) {
- ret = count;
- nr_schemes = 0;
- }
+ damon_set_schemes(ctx, schemes, nr_schemes);
+ ret = count;
+ nr_schemes = 0;
unlock_out:
mutex_unlock(&ctx->kdamond_lock);
--- a/mm/damon/lru_sort.c~mm-damon-return-void-from-damon_set_schemes
+++ a/mm/damon/lru_sort.c
@@ -203,9 +203,7 @@ static int damon_lru_sort_apply_paramete
scheme = damon_lru_sort_new_hot_scheme(hot_thres);
if (!scheme)
return -ENOMEM;
- err = damon_set_schemes(ctx, &scheme, 1);
- if (err)
- return err;
+ damon_set_schemes(ctx, &scheme, 1);
cold_thres = cold_min_age / damon_lru_sort_mon_attrs.aggr_interval;
scheme = damon_lru_sort_new_cold_scheme(cold_thres);
--- a/mm/damon/reclaim.c~mm-damon-return-void-from-damon_set_schemes
+++ a/mm/damon/reclaim.c
@@ -155,9 +155,7 @@ static int damon_reclaim_apply_parameter
scheme = damon_reclaim_new_scheme();
if (!scheme)
return -ENOMEM;
- err = damon_set_schemes(ctx, &scheme, 1);
- if (err)
- return err;
+ damon_set_schemes(ctx, &scheme, 1);
if (monitor_region_start > monitor_region_end)
return -EINVAL;
_
Patches currently in -mm which might be from kaixuxia@xxxxxxxxxxx are
mm-damon-sysfs-simplify-the-judgement-whether-kdamonds-are-busy.patch
mm-damon-core-iterate-the-regions-list-from-current-point-in-damon_set_regions.patch
mm-damon-vaddr-add-a-comment-for-default-case-in-damon_va_apply_scheme.patch
mm-damon-sysfs-use-the-wrapper-directly-to-check-if-the-kdamond-is-running.patch
mm-damon-simplify-the-parameter-passing-for-prepare_access_checks.patch
mm-damon-sysfs-simplify-the-variable-pid-assignment-operation.patch
mm-damon-core-simplify-the-kdamond-stop-mechanism-by-removing-done.patch
mm-damon-use-struct-damon_target-instead-of-void-in-target_valid.patch
mm-damon-return-void-from-damon_set_schemes.patch
