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mm/damon/sysfs: use DAMON core API damon_is_running()

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DAMON core implements a static function to see if a given DAMON context is
running.  DAMON sysfs interface is implementing the same one on its own. 
Make the core function non-static and reuse it from the DAMON sysfs
interface.

Link: https://lkml.kernel.org/r/20250705175000.56259-5-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-07-05 10:49:58 -07:00
committed by Andrew Morton
parent 775c96714d
commit d2b5be741a
3 changed files with 10 additions and 13 deletions
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1
include/linux/damon.h
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@@ -934,6 +934,7 @@ static inline unsigned int damon_max_nr_accesses(const struct damon_attrs *attrs
int damon_start(struct damon_ctx **ctxs, int nr_ctxs, bool exclusive);
int damon_stop(struct damon_ctx **ctxs, int nr_ctxs);
bool damon_is_running(struct damon_ctx *ctx);
int damon_call(struct damon_ctx *ctx, struct damon_call_control *control);
int damos_walk(struct damon_ctx *ctx, struct damos_walk_control *control);

8
mm/damon/core.c
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@@ -1311,7 +1311,13 @@ int damon_stop(struct damon_ctx **ctxs, int nr_ctxs)
return err;
}
static bool damon_is_running(struct damon_ctx *ctx)
/**
* damon_is_running() - Returns if a given DAMON context is running.
* @ctx: The DAMON context to see if running.
*
* Return: true if @ctx is running, false otherwise.
*/
bool damon_is_running(struct damon_ctx *ctx)
{
bool running;

14
mm/damon/sysfs.c
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@@ -1189,16 +1189,6 @@ static void damon_sysfs_kdamond_rm_dirs(struct damon_sysfs_kdamond *kdamond)
kobject_put(&kdamond->contexts->kobj);
}
static bool damon_sysfs_ctx_running(struct damon_ctx *ctx)
{
bool running;
mutex_lock(&ctx->kdamond_lock);
running = ctx->kdamond != NULL;
mutex_unlock(&ctx->kdamond_lock);
return running;
}
/*
* enum damon_sysfs_cmd - Commands for a specific kdamond.
*/
@@ -1275,7 +1265,7 @@ static ssize_t state_show(struct kobject *kobj, struct kobj_attribute *attr,
if (!ctx)
running = false;
else
running = damon_sysfs_ctx_running(ctx);
running = damon_is_running(ctx);
return sysfs_emit(buf, "%s\n", running ?
damon_sysfs_cmd_strs[DAMON_SYSFS_CMD_ON] :
@@ -1429,7 +1419,7 @@ static inline bool damon_sysfs_kdamond_running(
struct damon_sysfs_kdamond *kdamond)
{
return kdamond->damon_ctx &&
damon_sysfs_ctx_running(kdamond->damon_ctx);
damon_is_running(kdamond->damon_ctx);
}
static int damon_sysfs_apply_inputs(struct damon_ctx *ctx,