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samples/damon/prcl: avoid starting DAMON before initialization

Commit 2780505ec2b4 ("samples/damon/prcl: fix boot time enable crash") is
somehow incompletely applying the origin patch [1]. It is missing the
part that avoids starting DAMON before module initialization. Probably a
mistake during a merge has happened. Fix it by applying the missed part
again.

Link: https://lkml.kernel.org/r/20250909022238.2989-3-sj@kernel.org
Link: https://lore.kernel.org/20250706193207.39810-3-sj@kernel.org [1]
Fixes: 2780505ec2b4 ("samples/damon/prcl: fix boot time enable crash")
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

authored by

SeongJae Park and committed by
Andrew Morton e6b733ca f826edeb

+3
+3
samples/damon/prcl.c
··· 137 137 if (enabled == is_enabled) 138 138 return 0; 139 139 140 + if (!init_called) 141 + return 0; 142 + 140 143 if (enabled) { 141 144 err = damon_sample_prcl_start(); 142 145 if (err)