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.

Link: https://lkml.kernel.org/r/20220215184603.1479-4-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Xin Hao <xhao@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 20 insertions, 0 deletions

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);