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Fri, 21 Mar 2025 01:32:08 -0400 X-MC-Unique: 4Kd6ubaAO9yUjABb1h_y_g-1 X-Mimecast-MFC-AGG-ID: 4Kd6ubaAO9yUjABb1h_y_g_1742535126 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 025C2196D2D0; Fri, 21 Mar 2025 05:32:06 +0000 (UTC) Received: from gshan-thinkpadx1nanogen2.remote.csb (unknown [10.64.136.79]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id B4BA719373C4; Fri, 21 Mar 2025 05:31:59 +0000 (UTC) From: Gavin Shan To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, willy@infradead.org, david@redhat.com, vbabka@suse.cz, osalvador@suse.de, gehao@kylinos.cn, shan.gavin@gmail.com Subject: [PATCH 0/2] Fix parameter passed to page_mapcount_is_type() Date: Fri, 21 Mar 2025 15:31:46 +1000 Message-ID: <20250321053148.1434076-1-gshan@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Stat-Signature: 45pxb3u858y396jmearnxmhupw5mjkat X-Rspam-User: X-Rspamd-Queue-Id: D25F1140004 X-Rspamd-Server: rspam08 X-HE-Tag: 1742535134-84020 X-HE-Meta: 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 gKwetJuF vmxRdcjoVBq+kfflvZ7CU63cHQlzDuU5uiGT8bCiWIsKxQyifZ0Ul3YPe+epwZCwKxSndfVPLVEGW0P+Ool6UJEkGofhaVqr7IIpZ+bS7yOKduEWusfuM2YjsPIiJQ/Eg+/AosHXMBaTNr4nmm4HAbhNynRDMyBuurTLOZ2F5uzOUlEne+cBdBUotSBfDXBA0MG8iElQjADf1026RD5lMKpvRsistVgD1GRNygpzM8kDzpmVewlUL0VeP0ltelvkRKT7GNve4KLqcFY+IpTr9R94fmPVh0fvU5kCt/W/FZuRjwg0g0WsiCrZH9HX16YFwk1YNa3JVi560r9rwigK93/Q55iltnpZ/PdHX1X7LnV9kMCv5cRpD/iKr8kbZ7LTBnntrRwhixgTr9unk7/VJVogrkd1TLlsbAttJKbCDH1kB4wFCkUrUdg9xsQ== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Found by code inspection. There are two places where the parameter passed to page_mapcount_is_type() is (page->__mapcount), which is correct since it should be one more than the value, as explained in the comments to page_mapcount_is_type(): (a) page_has_type() in page-flags.h (b) __dump_folio() in mm/debug.c PATCH[1] fixes the parameter for (a) PATCH[2] fixes the parameter for (b) Gavin Shan (2): mm: Fix parameter passed to page_mapcount_is_type() mm/debug: Fix parameter passed to page_mapcount_is_type() include/linux/page-flags.h | 2 +- mm/debug.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) -- 2.48.1