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b=i10OdjcxbIIELF+N6tlSux0gYDg0CoQs9zRPvDBH7PxK3Pv5+MaS73hoMBgMR6UVj UlbnKTr0kP2i7z+BwDMbJpSrnxIeK1Ddrk2QqZ97vlQw3ARgIgTDRGPRkHrHF5jTww 238+MOrpYZDHA80e9LktKDClyiA2A8n8LqVsQbm2vGiINhRlNrDokGl1lm3HYB7kn0 /cPj6g8pP26AyT+oOeAbw3OEb7FYJinyuDeGNEL1C7atJrjXJIZODMLX0Tp1FCVbLe O4M56BR5HSjEnN12cWsdGEPnVTvDYlUZ30tjs3k0NHFZ8ridz1L/GkgBr7X5cX4BQR WFvLOvKYldZag== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 03/10] mm/damon/core: add damon_del_region() debug_sanity check Date: Fri, 6 Mar 2026 07:29:06 -0800 Message-ID: <20260306152914.86303-4-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260306152914.86303-1-sj@kernel.org> References: <20260306152914.86303-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 3380C40004 X-Stat-Signature: nt84mmf5ewznzfubbuum6fdn64r6w5q5 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1772810964-708845 X-HE-Meta: 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 CY2Tezl8 yJpcRvnlC56ncxxGuSlqdJBTgvaNwsN8FeDSCzKZjecXrWKVAUyOB6Yc6lttPBkth4dkpMVPASlx+DPvBeKWrM08eQ0CFwoHtC8KuPmRUMnHRfP6E7sbnJxszJeeeASM2Esfln2i5K3+8ZaZ/RyPjz3NfGVx0aPITwQHgYOJH66NP541OpS36yJgMEjnZJ+jIU0NKeAWeVmX+2IxxiIjn632erPx3KQ5GQVmhRehk4HvhEvy9dELFqL+LiLCk48tWHE68d0aPvMNqTAWNqCfT3EfCdA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: damon_del_region() should be called for targets that have one or more regions. Add a sanity check for that under CONFIG_DAMON_DEBUG_SANITY. Signed-off-by: SeongJae Park --- mm/damon/core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/mm/damon/core.c b/mm/damon/core.c index 0c1353164ec81..92eac5eb96026 100644 --- a/mm/damon/core.c +++ b/mm/damon/core.c @@ -152,8 +152,21 @@ void damon_add_region(struct damon_region *r, struct damon_target *t) t->nr_regions++; } +#ifdef CONFIG_DAMON_DEBUG_SANITY +static void damon_verify_del_region(struct damon_target *t) +{ + WARN_ONCE(t->nr_regions == 0, "t->nr_regions == 0\n"); +} +#else +static void damon_verify_del_region(struct damon_target *t) +{ +} +#endif + static void damon_del_region(struct damon_region *r, struct damon_target *t) { + damon_verify_del_region(t); + list_del(&r->list); t->nr_regions--; } -- 2.47.3