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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6dd18137218sm174104476d6.57.2025.01.06.16.03.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Jan 2025 16:03:51 -0800 (PST) From: Gregory Price To: linux-mm@kvack.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, nehagholkar@meta.com, abhishekd@meta.com, david@redhat.com, nphamcs@gmail.com, gourry@gourry.net, akpm@linux-foundation.org, hannes@cmpxchg.org, kbusch@meta.com, ying.huang@linux.alibaba.com, feng.tang@intel.com, donettom@linux.ibm.com Subject: [PATCH v3 1/6] migrate: Allow migrate_misplaced_folio_prepare() to accept a NULL VMA. Date: Mon, 6 Jan 2025 19:03:41 -0500 Message-ID: <20250107000346.1338481-2-gourry@gourry.net> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250107000346.1338481-1-gourry@gourry.net> References: <20250107000346.1338481-1-gourry@gourry.net> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit migrate_misplaced_folio_prepare() may be called on a folio without a VMA, and so it must be made to accept a NULL VMA. Suggested-by: Johannes Weiner Signed-off-by: Gregory Price --- mm/migrate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/migrate.c b/mm/migrate.c index caadbe393aa2..ea20d9bc4f40 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2627,7 +2627,7 @@ int migrate_misplaced_folio_prepare(struct folio *folio, * See folio_likely_mapped_shared() on possible imprecision * when we cannot easily detect if a folio is shared. */ - if ((vma->vm_flags & VM_EXEC) && + if (vma && (vma->vm_flags & VM_EXEC) && folio_likely_mapped_shared(folio)) return -EACCES; -- 2.47.1