linux-kernel - [PATCH 3/8] mm/damon/paddr,vaddr: Register themselves to DAMON in subsys

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Message-Id: <20220215184603.1479-4-sj@kernel.org>
Date:   Tue, 15 Feb 2022 18:45:58 +0000
From:   SeongJae Park <sj@...nel.org>
To:     akpm@...ux-foundation.org
Cc:     xhao@...ux.alibaba.com, rientjes@...gle.com, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org, SeongJae Park <sj@...nel.org>
Subject: [PATCH 3/8] mm/damon/paddr,vaddr: Register themselves to DAMON in subsys_initcall

This commit makes the monitoring operations for the physical address
space and virtual address spaces register themselves to DAMON in the
subsys_initcall step.  Later, in-kernel DAMON user code can use them via
damon_select_ops() without have to unnecessarily depend on all possible
monitoring operations implementations.

Signed-off-by: SeongJae Park <sj@...nel.org>
---
 mm/damon/paddr.c | 20 ++++++++++++++++++++
 mm/damon/vaddr.c | 20 ++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 9f0abd0369bc..d968bb38bd5d 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
@@ -273,3 +273,23 @@ void damon_pa_set_operations(struct damon_ctx *ctx)
 	ctx->ops.apply_scheme = damon_pa_apply_scheme;
 	ctx->ops.get_scheme_score = damon_pa_scheme_score;
 }
+
+static int __init damon_pa_initcall(void)
+{
+	struct damon_operations ops = {
+		.id = DAMON_OPS_PADDR,
+		.init = NULL,
+		.update = NULL,
+		.prepare_access_checks = damon_pa_prepare_access_checks,
+		.check_accesses = damon_pa_check_accesses,
+		.reset_aggregated = NULL,
+		.target_valid = damon_pa_target_valid,
+		.cleanup = NULL,
+		.apply_scheme = damon_pa_apply_scheme,
+		.get_scheme_score = damon_pa_scheme_score,
+	};
+
+	return damon_register_ops(&ops);
+};
+
+subsys_initcall(damon_pa_initcall);
diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index c0eb32025f9b..87475ba37bec 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -752,4 +752,24 @@ void damon_va_set_operations(struct damon_ctx *ctx)
 	ctx->ops.get_scheme_score = damon_va_scheme_score;
 }
 
+static int __init damon_va_initcall(void)
+{
+	struct damon_operations ops = {
+		.id = DAMON_OPS_VADDR,
+		.init = damon_va_init,
+		.update = damon_va_update,
+		.prepare_access_checks = damon_va_prepare_access_checks,
+		.check_accesses = damon_va_check_accesses,
+		.reset_aggregated = NULL,
+		.target_valid = damon_va_target_valid,
+		.cleanup = NULL,
+		.apply_scheme = damon_va_apply_scheme,
+		.get_scheme_score = damon_va_scheme_score,
+	};
+
+	return damon_register_ops(&ops);
+};
+
+subsys_initcall(damon_va_initcall);
+
 #include "vaddr-test.h"
-- 
2.17.1